Plotting the Koch Snowflake. To define a patch with faces that do not close, add one or more NaNs to the row in the Vertices matrix that defines the vertex you do not want connect. surface is the low-level function for creating surface graphics objects. 3D Plots in Matlab Learn how to plot graphs in Matlab In this case, the vertices of the surface faces are (X(j), Y(i), Z(i,j)) triples. Here is one proper solution based on the integrated function patch in MATLAB. obj mesh reader for MATLAB I wrote a little. This section includes several examples of generic programming. So in this case the first face is a triangle with extremeties at the first 3 vertices. SSLTool is developed on Matlab version R2010b, and has been tested on version R2009a and above. To define a patch with faces that do not close, add one or more NaNs to the row in the Vertices matrix that defines the vertex you do not want connected. This MATLAB function returns a polyshape object made up of the boundaries of the polygon polyin with all vertex duplicates removed, and all boundary intersections and improper nesting resolved. When I want to label some data points, I use the text function. This syntax returns the vertices of the finite Voronoi edges, which you can then plot with the plot function. PyWCSTools is distributed (and developed) as part of astLib. Histogram and Pie Chart. Defining a Vector¶. polyshape supports the Boolean operations supported by polybool: union, intersection, subtraction, and exclusive OR. MATLAB (MATrix LABoratory) is basically a high level language which has many specialized toolboxes for making things easier for us. T is usually the output of a Delaunay triangulation of a 3-D set of points. For the function name and arguments, use TriCirc (A, B, C). Introduction to directed and undirected graphs. These vertices are the first and fourth vertices in the property poly1. The blue circles are each of the vertices, and the red stars are the points considered when using the convex hull (due to slight curvature in some of the edges, the blue circles without red stars are excluded from the convex hull). MATLAB has built in commands to draw spheres and cylinders: >> [x,y,z] = sphere(10); % three 11x11 matrices >> surf(x,y,z); % displays sphere Increasing the argument of the command sphere we can make the sphere more smooth. actually for some of my data, I have both the faces and vertices and so I can plot my data as figure attached. Matlab Tools for Network Analysis (2006-2011) This toolbox was first written in 2006. For example, shape in matlab which has shape. plot(x,y,s) plot x,y data with style s : subplot(r,c,n) specify a configuration of r rows and c columns of plots in a figure and activate the nth area. In many circumstances surface view is much more straightforward than a slice view. surf(X,Y,Z,C) creates a shaded surface, with color defined by C. 6) SPM (v8) Step 1. let's plot the second. SYNTAX: n=hist(y) – Bins the elements in vector y into 10 equally spaced containers and returns the number of elements in each container as a row vector. Examples of different shapes. Translate the triangle by the vector [1;2] and then plot the resulting triangle. 5 produces approximately half as many. trimesh( ___ , Name,Value ) specifies one or more properties of the mesh plot using name-value pairs. the way you propose, draws some faces that are not correct and this can be seen by comparing the two figures attachd. Sometimes it chooses incorrectly. sharetechnote. La multiplication des appels à plot peut engendrer un ralentissement du code si le nombre d'objets devient élevé. (At a later point you may wish to look at the various plotting options in the MATLAB help files. Learn more about stl MATLAB Answers. The only downside is that you'll have to pick a projection, like you're looking along the z axis so that you are basically looking at the x-y plane, and you won't be able to interactively rotate your 3D scatterplot of points. This example draws stream lines from data representing air currents over a region of North America. SPHERE_VORONOI, a MATLAB library which computes the Voronoi diagram of points on the unit sphere. The vertices of the rectangles [x, y] are typically the output of meshgrid. I tried using PATCH command and got two funny triangles. The vertexid value enables you to index into the row of polyin. The three dimensional plot command is. I recently had a problem where I was trying to identify which corners of a property lot were abutting a street. For a first example, we will consider the bounded region between the curves y = 2x+2 and y = exp(x). Since a lot of geologic data is naturally of more than one dimension, we have use for these capabilities. In cases where they do not, pad the end of the Faces matrix with NaNs. If MATLAB ignores hold off (which it does occasionally), give the command. The plot is a logically rectangular, two-dimensional grid with vertices at the points [X(i,j), Y(i,j)]. tetramesh(T,X,c) displays the tetrahedrons defined in the m-by-4 matrix T as mesh. Create and plot a polyshape object whose boundaries are equal to the boundaries of the triangulation. Beginning with an equilateral triangle, a smaller equilateral triangle is placed halfway along each edge of the shape. This document is an initial attempt to help new users get started with the toolbox. One is that this entry does the task that I usually dread doing, which is making finishing touches to my plots. So how do I tell Matlab that it. surface(Z) plots the surface specified by the matrix Z. 3D Plots in Matlab Learn how to plot graphs in Matlab In this case, the vertices of the surface faces are (X(j), Y(i), Z(i,j)) triples. In this lesson you will learn how to draw polygons by using given coordinates as vertices. The tricky part is to change the Edge. Not every sample of data can be meaningfully plotted on a two-dimensional graph. MATLAB can also be used as a programming language. Assign02 Matlab - Free download as PDF File (. Chalmers University of Technology. This syntax returns the vertices of the finite Voronoi edges, which you can then plot with the plot function. Well, that's just a visualization, not the actual data structure. I want to plot an Ellipse. Projection (polyhedron, proj=) ¶ Bases: sage. I am dealing with k-neighbour problem in MATLAB. surf(X,Y,Z,C) creates a shaded surface, with color defined by C. There is an image with row r and column c. Contribute to areslp/matlab development by creating an account on GitHub. 2157) (The coordinates are taken from another part of code so the ellipse must be on the first quadrant of the x-y axis) I also want to be able to change the eccentricity of the ellipse. A MATLAB script is a program which simply executes lines of MATLAB code. plot cube in matlab with a given eight points then translate and rotate it! I have 8 points to plot a cube in matlab. It will be much much faster that way. October 2008 Online only Revised for MATLAB 7. Vertices corresponding to the nearest vertex, accessing its coordinates. This MATLAB function draws well-spaced streamlines (with direction arrows) from vector data U, V, W in axis aligned x-, y-, z-planes at the points in the vectors startx, starty, startz. Make a vector of points for your X coordinates, x. Well, that's just a visualization, not the actual data structure. How can I plot a specific size 3D bounding box (cube) around a 3D point? For example, the coordinate of the point is (10,5,10) and I need to draw a 3D bounding box size 20 (20x20x20) around the point such that the point is in the center (inside) of the 3D box. Welcome to Reddit, For example this one. Call the nexttile function to create the axes objects ax1 and ax2. o MATLAB Application & usage o MATLAB Environment o MATLAB Variables o MATLAB Operations. Use the isosurface function to generate the faces and vertices for the outside of the surface and the isocaps function to generate the faces and vertices for the end caps of the volume. A shapefile is a standard geospacial data format for storing location, shape, and attributes of geospacial features. Each row contains the x, y, and z-coordinates of each vertex. Setting Default Properties. ') creates the Voronoi diagram. 3D Plots in Matlab Learn how to plot graphs in Matlab In this case, the vertices of the surface faces are (X(j), Y(i), Z(i,j)) triples. tetramesh(T,X,c) displays the tetrahedrons defined in the m-by-4 matrix T as mesh. Everything you would ever want to know about patch can be found in the matlab helpdesk. streamparticles(vertices,n) uses n to determine how many stream particles to draw. Plot a surface from data sets in MATLAB. MATLAB experts undoubtedly will find better ways of implementing what I have attempted to do). The plot function plots columns of Y versus columns of X. The ability to handle surfaces and grids is one of Matlab's many strengths. How can I plot edges with predefined vertices Learn more about graph, adjacency matrix, edge, node, edge list, connectivity MATLAB. 1, 2019 PATH PLANNING-ORIENTED OBSTACLE AVOIDING WORKSPACE MODELLING FOR ROBOT MANIPULATOR Yi Cao,∗ Jason Gu,∗ Y. This results in an initial hexahedral mesh of the model, which can then be rened to the desired density. The mapping toolbox in MATLAB has tools for working with these datasets. the goal here is to replace these circles for example with hexagons or triangles ( if number of vertices = 3 eq => triangle, if numbre of vertices = 6 eq => hexagon). Ask Question I tried to plot a surface in MATLAB but, since it is the first time I had to do something like this, I need. T is usually the output of a Delaunay triangulation of a 3-D set of points. clf to clear the plot window. sage_object. Create separate line plots in the axes by specifying the axes object as the first argument to plot3. I would like to plot the corresponding partition, and to fill each spherical polygon with a different color. TRIV(the triangle faces) can be seen as a 3D triangle mesh shape. Then we can modify Edge. Example - Defining a Cube. These vertices are the first and fourth vertices in the property poly1. csv file with Matlab : % TEMPLATE – Read and plot data from txt file. You may also plot more cubes to present 3-dimension data. But in the cases that there is no faces, I'm looking for a solution. Download with Google Download with Facebook or download with email. The last version, posted here, is from November 2011. This method modifies the graph’s embedding so that the vertices listed in vertices appear in this ordering on a circle of given radius and center. Histogram hist() function helps us to plot the histogram. 5 produces approximately half as many. m, 5/19/05 % function h = plot(d,varargin) % Clear the axis if we are replacing patches if strcmp(get(gca,'nextplot. There are way too many vectors in this plot. Draw vertices using different colors and markers. TRIANGULATION_PLOT, a MATLAB program which plots a triangulation. the goal here is to replace these circles for example with hexagons or triangles ( if number of vertices = 3 eq => triangle, if numbre of vertices = 6 eq => hexagon). An isosurface is a surface where all the points within a volume of space have a constant value. T is usually the output of a Delaunay triangulation of a 3-D set of points. The plot is a logically rectangular, two-dimensional grid with vertices at the points [X(i,j), Y(i,j)]. I recently had a problem where I was trying to identify which corners of a property lot were abutting a street. You could try wgPlot or gplotwl. The control file is used to call the cube_plot. draws a 20-sided polygon with little circles at the vertices. Feret Diameters and Antipodal Vertices 3 Posted by Steve Eddins , October 24, 2017 Last time , I wrote about finding the maximum Feret diameter for an object in a binary image, ending up with this figure:. surface(Z) plots the surface specified by the matrix Z. If we give all the data of the vertices's coordinates and the graph's adjacency matrix, how to plot it with tikz, pstrick or other tool in tex?. (Octave is a GNU program which is designed to provide a free tool that work like Matlab. Beginning with an equilateral triangle, a smaller equilateral triangle is placed halfway along each edge of the shape. You can make this into an RGB image and then display with the image() or imshow() command. Description. It gives me. The wireframe mesh is plotted using rectangles. The pdepoly command opens the PDE Modeler app with the specified polygon drawn in it. (Let me add -- unlike Dick, who is a true MATLAB expert, I am a MATLAB dilettante, which I am sure is reflected in my code, below. Here is how I created such a plot using MatLab and SPM. MATLAB is a program for doing. Loading the wind data set creates the variables x, y, z, u, v, and w in the MATLAB workspace. Open Mobile Search. Learn more about plot, plotting, 3d plots, matrix, plot3, image processing, matlab gui, mathematics. Environment and Tools: Windows XP; MatLab (v7. Create separate line plots in the axes by specifying the axes object as the first argument to plot3. The input arguments are vectors with the x and y coordinates of the vertices, respectively. Here is my question: Given a graph g and coordinates x and y for each node. Functions for plotting polyhedra¶ class sage. This constructor assumes default options. Each row of T contains the vertex IDs that define a triangle or tetrahedron. circles(x,y,r) plots circle of radius r centered at points (x,y). To define a patch with faces that do not close, add one or more NaNs to the row in the Vertices matrix that defines the vertex you do not want connect. There can be long distances between. Matlab Bilinear Interpolation. It draws vertical lines (with little circles on the tip) proportional to the value of the function at that horizontal value. MATLAB Function Reference returns the vertices of the Voronoi edges in vx and vy so that plot(vx,vy,'-',x,y,'. I want to find out the vertices of polygons that make up the voronoi diagram limited by a rectangular boundary. The idea is to have a quite smooth surface, because then I have to fit this surface created from measurement data using a mathematical model. Find vertices and plot triangle in Matlab. But in the cases that there is no faces, I'm looking for a solution. I tried using PATCH command and got two funny triangles. How can this be done? In case you are also used to MATLAB, there is the function gplot, which does the job. In cases where they do not, pad the Faces matrix with NaNs. tetramesh(T,X,c) displays the tetrahedrons defined in the m-by-4 matrix T as mesh. How can I plot edges with predefined vertices Learn more about graph, adjacency matrix, edge, node, edge list, connectivity MATLAB. How can this be done?. Plot a surface from data sets in MATLAB. Functions for plotting polyhedra¶ class sage. Chalmers University of Technology. If you do not specify values, MATLAB uses the default: stepsize = 0. _circle_embedding(g, vertices, center=(0, 0), radius=1, shift=0)¶. There are various functions that you can use to plot data in MATLAB ®. obj file format reader in MATLAB. I want to check the points in the convex hull, I know how to find the convex hull of the set but I don't know how to find the vertices so I can check them. T is usually the output of a Delaunay triangulation of a 3-D set of points. To begin this series on computational geometry in MATLAB, we’ll discuss the creation of random polygons in MATLAB. coord_index_of (v) ¶. A shapefile is a standard geospacial data format for storing location, shape, and attributes of geospacial features. draws a 20-sided polygon with little circles at the vertices. ColorBinding value from its default value of 'object' to 'interpolated' (there are also 'discrete' and 'none'). Graph::plotBipartiteGraph(G) returns a plot::Group2d object in which the vertices are ordered in two rows (from bottom to top). The second entry is the number of columns. Hi, Guys I just started using Matlab and I would like to how to plot 3d figure for co-ordinates shown in the image which happens to be a triangular prism. Plotting the Koch Snowflake. Since a lot of geologic data is naturally of more than one dimension, we have use for these capabilities. When you type hold on MATLAB does not remove the existing graph; it adds the new data to the current graph, rescaling if necessary. Although MATLAB do include visualization functionality for surface and contour plots (with the surf and contour functions), it is currently limited to regular structured tensor-product grids (such as those created with meshgrid). MATLAB has different plotting approaches for showing data in 3D: 3D line plots [MATLAB: plot3. surf(X,Y,Z,C) creates a shaded surface, with color defined by C. Create and plot a polyshape object whose boundaries are equal to the boundaries of the triangulation. Jiro's pick this week is labelpoints by Adam Danz. over a 2-D rectangular region in the x-y plane. Translate the triangle by the vector [1;2] and then plot the resulting triangle. vertices is a cell array of stream line vertices (as produced by stream3 ). tetramesh(T,X,c) displays the tetrahedrons defined in the m-by-4 matrix T as mesh. 6 (Release 2008a) This publication was previously part of the Using MATLAB Graphics User Guide. Use the polyshape boundary object function to return Cx and Cy. A row of T contains indices into X of the vertices of a tetrahedron. fill3 closes. I tried using PATCH command and got two funny triangles. For example, these statements first create a contour plot of the peaks function, then superimpose a pseudocolor plot of the same function:. Each row of T contains the vertex IDs that define a triangle or tetrahedron. The basic premise of computational geometry is to calculate distances, areas, intersections and other geometrical calculations on basic objects such as points, lines and polygons. My question is how to visualize such a shape in MATLAB with a specific colormap. This MATLAB function creates a 2-D line plot of the data in Y versus the corresponding values in X. 1, 2019 PATH PLANNING-ORIENTED OBSTACLE AVOIDING WORKSPACE MODELLING FOR ROBOT MANIPULATOR Yi Cao,∗ Jason Gu,∗ Y. 6) SPM (v8) Step 1. To create these formats, MATLAB renders the Figure using the Z-buffer rendering method and the resulting pixmap is then saved to the specified file. 5 produces approximately half as many. Learn more about stl MATLAB Answers. We can plot this polygon in Matlab very easily. Plot the given triangle whose vertices are given in T. But the plot functions in MATLAB cannot directly fulfil this goal. x and y should now both be column vectors with the sa. let's plot the second. Description. Matlab IV: Modeling and Simulation 11 The Department of Statistics and Data Sciences, The University of Texas at Austin in the Command window of the default Matlab desktop, by clicking on the Simulink icon on Matlab's icon toolbar , or from the Start button with Start > Simulink > Library Browser. Some Interests: -3D Volume Processing (CT, mri) -Finite Element Analysis (human body simulation) -Geometry Analysis (human body morphomics) Professional Interests: Image processing, Finite Element Analysis, Human Body Biomechanics. For example, plot(G,'-or') uses red circles for the nodes and red lines for the edges. MATLAB can also be used as a programming language. Types of MATLAB Plots. Matlab is a software package that makes it easier for you to enter matrices and vectors, and manipulate them. Learn more about 3d plots, figure, mesh, handles, surface, plot MATLAB, Image Processing Toolbox, MATLAB C/C++ Graphics Library. Randomness can also used to create beautiful computer arts, as seen on OpenProcessing. In this example we're going to explain how to draw a 3D polygon using Matlab. With an initial seed, one can generate random fantasy map, a random planet , a random block world, or even an random universe. PlotBoxAspectRatio Sets the proportions of the axes plot box (set box to on. Then you establish x, y (and z if applicable) according to the equations, then plot using the plot(x,y) for 2D or the plot3(x,y,z) for 3D command. Each row contains the x, y, and z-coordinates of each vertex. Plot lines in 3-space] 3D mesh plots [MATLAB: mesh, meshc, meshz, waterfall. Join GitHub today. One is that this entry does the task that I usually dread doing, which is making finishing touches to my plots. o Integrates computation, visualization, and programming in an easy-to-use environment where problems and solutions are. A weighted graph is a graph whose vertices or edges have been assigned weights; more specifically, a vertex-weighted graph has weights on its vertices and an edge-weighted graph has weights on its edges. The mapping toolbox in MATLAB has tools for working with these datasets. I am plotting this over a grid, and matlab is plotting a vector at each single cell, and the tip of the arrow is not very visible. This class keeps track of the necessary data to plot the input polyhedron. Scribd is the world's largest social reading and publishing site. You can make this into an RGB image and then display with the image() or imshow() command. draws a 20-sided polygon with little circles at the vertices. December 17, 2016 Brandon. I recall back in grad school doing some homework where we were treating pixels as hexagons. MATLAB experts undoubtedly will find better ways of implementing what I have attempted to do). MATLAB has different plotting approaches for showing data in 3D: 3D line plots [MATLAB: plot3. over a 2-D rectangular region in the x-y plane. Date: 12-17 2016 function plot_mountains %PLOT_MOUNTAINS Plots mountains % prepare vertices for the fill. 1 (one tenth of a cell) maximum number of vertices = 1000 Examples. If we use the instruction ' plot(x, y, '-o') ', we obtain the following figure (just to visualize what we are doing):. This way the faces always link the same points, regardless of their new positions. density must be greater than 0. Use lane marking vertices and faces to display lane markings using the laneMarkingPlotter function with a bird's-eye plot. See Example 2. You may also plot more cubes to present 3-dimension data. ZIP file and add the obtained. This class keeps track of the necessary data to plot the input polyhedron. Matlab is a software package that makes it easier for you to enter matrices and vectors, and manipulate them. There is a particularly compact way of making surfaces of irregularly spaced data called a Delaunay triangulation. The co-ordinates of point c are (-1,3,2). 0), to being a 4xN matrix, where N is the number of data points specified for the line, such that each data point. If the sphere is the unit sphere at the origin, the facet normals are the Voronoi vertices. If the number. Plot a surface from data sets in MATLAB. prompt = { 'Enter Number of vertices:' ,} numberOfVertices = str2num(cell2mat(inputdlg(prompt, 'enter a number' , 5))). Translate the triangle by the vector [1;2] and then plot the resulting triangle. The wireframe mesh is plotted using rectangles. MATLAB has different plotting approaches for showing data in 3D: 3D line plots [MATLAB: plot3. Show an image in a MATLAB 3D surface plot with a separate colormap T he surface / surf plot in MATLAB can visualize data in 3D. The triangle's coordinates are specified in a 3 by 2 matrix where each row represents one of the triangle vertices (columns represent x and y coordinate, respectively). Not every sample of data can be meaningfully plotted on a two-dimensional graph. Each row of T contains the vertex IDs that define a triangle or tetrahedron. The Koch snowflake is a well known fractal. A 3D triangle mesh shape is represented by vertices and triangle faces. the 3D coordinates of each vertex is present with me in another 3D array called POINTS. An isosurface is a surface where all the points within a volume of space have a constant value. 6 (Release 2008a) This publication was previously part of the Using MATLAB Graphics User Guide. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. 2157) (The coordinates are taken from another part of code so the ellipse must be on the first quadrant of the x-y axis) I also want to be able to change the eccentricity of the ellipse. The plot is a logically rectangular, two-dimensional grid with vertices at the points [X(i,j), Y(i,j)]. HOWEVER, it usually does what you want, AND if anything seems complicated you're probably not going about it the cutest way. 3D Polygon - draw planes with Matlab. I also downloaded the. Use the polyshape boundary object function to return Cx and Cy. let's plot the second. The interface follows a language that is designed to look a lot like the notation use in linear algebra. 3D Plots in Matlab Learn how to plot graphs in Matlab In this case, the vertices of the surface faces are (X(j), Y(i), Z(i,j)) triples. MATLAB does not require each face to have the same number of vertices. Although MATLAB do include visualization functionality for surface and contour plots (with the surf and contour functions), it is currently limited to regular structured tensor-product grids (such as those created with meshgrid). MATLAB has built in commands to draw spheres and cylinders: >> [x,y,z] = sphere(10); % three 11x11 matrices >> surf(x,y,z); % displays sphere Increasing the argument of the command sphere we can make the sphere more smooth. The second face is defined by vertices 5, 3 and 2and so on. There are various functions that you can use to plot data in MATLAB ®. Create separate line plots in the axes by specifying the axes object as the first argument to plot3. Preventing MATLAB from putting a new plot on top of an old one. If you have a triangle mesh with 3d vertex positions V (number of vertices by 3 ) and face list F (number of faces by 3) you can plot and label using:. MATLAB experts undoubtedly will find better ways of implementing what I have attempted to do). If you are using MATLAB R2016b you can use the new fimplicit3 command: fimplicit3(@(x,y,z) abs(x)+abs(y)+abs(z)-1) You may also be interested in fplot , fplot3 , fsurf , fmesh , fcontour , and fimplicit (some of these have been available since R2016a, but fimplicit3 was added in R2016b). I see that this has the tag "3d plots" but you refer to "polygon". To plot vector functions or parametric equations, you follow the same idea as in plotting 2D functions, setting up your domain for t. The second face is defined by vertices 5, 3 and 2and so on. How can this be done? In case you are also used to MATLAB, there is the function gplot, which does the job. The pdepoly command opens the PDE Modeler app with the specified polygon drawn in it. This table classifies and illustrates the common graphics functions. MATLAB stands for matrix laboratory. What is the shape of a pixel? At various times, I have a pixel as a square (often), a point (sometimes), or a rectangle (occasionally). pgon = polyshape(x,y) creates a polyshape from 2-D vertices defined by a vector of x -coordinates and a vector of corresponding y -coordinates. But in the cases that there is no faces, I'm looking for a solution. MATLAB PDE Toolbox Commands What does the MATLAB PDE Toolbox do? The PDE Toolbox is a tool to solve partial differential equations (PDE) by making it easy to input the 2-D domain, specify the PDE coefficients and boundary conditions, and numerically solve a finite element discretization using piecewise linear elements. Each row of T contains the vertex IDs that define a triangle or tetrahedron. If a few patches have overlapping vertices, then MATLAB must choose which patch to draw first. Not a binary tree, just a tree, like the directory structure (that's what I need it for - to visualise and print a directory structure). patch connects the vertices in the order that you specify them. MATLAB: Write a user-defmed function that plots a triangle and the circle that is inscribed inside the triangle, given the coordinates of its vertices. The Koch snowflake is a well known fractal. tree = bctree(G) returns the block-cut tree of graph G, such that each node in tree represents either a biconnected component or cut vertex of G. Draw vertices using different colors and markers. How to make 3D line plots in MATLAB ®. Our main built-in function in this case is the function "fill3", which is intended to color 3D flat planes. Display Isosurface. ffmatlib provides useful commands to create contour() , quiver() as well as patch() plots from FreeFem++ simulation results. The blue circles are each of the vertices, and the red stars are the points considered when using the convex hull (due to slight curvature in some of the edges, the blue circles without red stars are excluded from the convex hull). These routines are useful for someone who wants to start hands-on work with networks fairly quickly, explore simple graph statistics, distributions, simple visualization and compute common network theory metrics. The symbols can appear in any order, and you can omit one or more of the characteristics. Create separate line plots in the axes by specifying the axes object as the first argument to plot3. T is usually the output of a Delaunay triangulation of a 3-D set of points. The pdepoly command opens the PDE Modeler app with the specified polygon drawn in it. Toggle Main Navigation Productos. h = streamslice() returns a vector of handles to the line objects created. A waterfall plot is similar to a meshz plot except only mesh lines for the rows of z (x-values) are shown. Description. z determines the height above the plane of each vertex. A cube is defined by eight vertices that form six sides.