Fill3 matlab. Patch properties control the appearance and behavior of Patch objects. Fill3 matlab

 
 Patch properties control the appearance and behavior of Patch objectsFill3 matlab

. To plot one region, specify X, Y, and Z as vectors. please take a look to my code. example. fill3(X,Y,Z,C) fills three-dimensional polygons. So you can create a polygon out of your lines by going along your first curve than coming back along your second curve. To change color and transparency all you have to write in example:Comes from the documentation of fill3, which states that the fill3 command creates a patch object. Copy. Visualizations of fully 3D data sets] 3D specialized plots [MATLAB: ribbon, quiver, quiver3, fill3, stem3, sphere, cylinder. Denote these values as gmax, gmin, then we can normalize the entire data set according to these values. by using hold off. BW2 = imfill (BW) displays the binary image BW on the screen and lets you define the. However, the border line color is always black. a = rand (200); % Create a logical image that defines a rectangular boundary. C specifies color, where C is the vector or matrix of. Call the nexttile function to create the axes objects ax1 and ax2. You have the data for the lower and upper values of z in the cylinder. matlab plotting. Description. Line Plots. fill3 (X,Y,Z,C) plots filled polygonal regions on 3-D axes as Patch objects with vertices at the ( x, y, z) locations specified by X, Y, and Z. 영역을 여러 개. x= (-10:0. Just use fill in conjunction with fliplr. Is there an equivalent to Matlab’s fill3 in Plots. . Skip to content. The fill function creates colored polygons. So you can create a polygon out of your lines by going along your first curve than coming back along your second curve. . I'm trying to plot a signal, for example cos(x), with a red gradient colormap for positive values and a blue one for negative values. You also can create geometries where some cells are empty; for example, hollow cylinders, cubes, or spheres. 2nd. ) Description. fill3(X,Y,Z,C) fills three-dimensional polygons. drawing 3d contour plot from 3d vector. Plot multiple lines on the same axes. Description. Learn more about fill, fill3Following an idea I got from Malcolm Lidierth’s MUtilities submission on the Matlab File Exchange, the solution for setting Matlab figure window transparency is quite simple: Get the figure’s underlying Java window reference handle, as in last week’s article. This is the area I would like to use 'fill3' on. Thus, I have written something like: axes01 = fill3(X1, Y1. )Answers (1) Image Analyst on 28 Sep 2015. So one call per end of the cylinder. As far as why your plot looks "not as nice". I2 = imfill (I,conn) fills holes in the grayscale image I, where conn specifies the connectivity. Description. , Xn, Yn, Cn) // It is used for multiple 2D filled areas in. fill ( ___,Name,Value) modifies the patches using one or more name-value arguments to set properties. To create a 2D logical image of a solid circle (a disc), you can use code like this: % diameter, center, and image size. Then plot the filled region in red. fill3 command working strangely?. I can specify the fill color of the shape. If you get stuck, let me know where I can help. The default origin of the axis of rotation is the center of the plot box. Learn more about fill3, transparent polygonsfill (X1,Y1,C1,. This MATLAB function plots filled polygonal regions as patches with vertices at the (x,y) locations specified by X and Y. 0. 86] z = [0,-2. A variation on a theme of the above is to calculate and plot3/fill3 the first case then write the labels before you build the loop. ,Xn,Yn,Cn) plots multiple two-dimensional filled polygonal regions on the same axes. fill3(X,Y,Z,C) fills three-dimensional polygons. X, Y, and Z triplets specify the polygon vertices. Read about slice. I will remove my answer. Instead, you should first perform the calculations and find the points, then plot them all at once:Learn more about matlabgui, fill3, patch . MATLAB - Surf Plot data structure. 1 Answer. 98,0. This emulator is open-source software and is being developed by Microsoft. MATLAB 2D plot parabolic line rotation to form a cone in 3D. How to successively fill a vector with for loop?. Load the file windData. However, I need to update the position of this object over time. Thanks KSSV. 영역 하나를 플로팅하려면 X, Y, Z 를 벡터로 지정하십시오. 2. Specify value as 'clear' or 'opaque', or as a number in the. . It seemed Matlab cannot close the polygon automatically, thus wouldn't color it. Find more on Axes Appearance in Help Center and File Exchange. Children (1). Accepted Answer: Adam Danz. To change color and transparency all you have to write in example: Theme. The fill3. Filled two-dimensional polygons. )This MATLAB function plots filled polygonal regions as patches with vertices at the (x,y) locations specified by X and Y. 5; % for 50% transparent. zplane = solve (planefunction, z) zplane = (10*y)/31 - (9*x)/31 + 112/31. fill3 (X,Y,Z,C) plots filled polygonal regions on 3-D axes as Patch objects with vertices at the ( x, y, z) locations specified by X, Y, and Z. Description. 2 using a new version of Microsoft Windows. The mesh plot uses Z for height and C for color. 1. 可以使用上述语法中的任何输入参数组合来指定补片。. 01:2,0:0. To change color and transparency all you have to write in example:With these functions, you can create stacked or nested geometries. example. How do i do that ?imagesc can put the png on you plot. The fill3 function creates flat-shaded and Gouraud-shaded polygons. Learn more about plot, rectangle, outline, width, edge, none. . The function GRIDDATA can be used to interpolate and plot data in 3-D as follows: ZI = griddata (x,y,z,XI,YI) fits a surface of the form z = f (x,y) to the data in the (usually) nonuniformly spaced vectors (x,y,z). Learn more about fill3 MATLABSyntax. [columnsInImage rowsInImage] = meshgrid (1:imageSizeX, 1:imageSizeY); % Next create the circle in the image. Here is another very helpful MATLAB doc on how to manually setting the colormap for a patch object (surf and trisurf are both using patch to draw things): Coloring Mesh and Surface Plots Here is what the numerical solution using quadratic elements is like for $-Delta u = 1$ with homogeneous Dirichlet boundary data on an L-shape domain. fill3(X,Y,Z,colorSpec) fills a polygon in 3D with a specific color. Apparently, putting 'figure(1)' inside the loop makes a huge difference. GRIDDATA interpolates this surface at the. Filled three-dimensional polygons. Color. The shading function controls the color shading of surface and patch graphics objects. To plot multiple regions, specify X, Y, and Z as matrices where each column corresponds to a polygon. 2) axis equal. Description. Rather than using the LINE function a PATCH surface is generated. Theme. To plot multiple regions, specify X, Y, and Z as matrices where each column corresponds to a polygon. You define a patch by specifying the coordinates of its vertices and some form of color data. viscircles ( ___,Name,Value) utiliza argumentos de nombre-valor para especificar propiedades adicionales de los círculos. Our main built-in function in this case is the function “fill3”, which is intended to color 3D flat planes. Is there an equivalent to Matlab’s fill3 in Plots. You must use Matlab / Python, or Python2. Well, I did mention how to do that, but only briefly. Learn more about fill3, interpolation, rectangular elementTo create colors manually and assign them to the marker values, start with the RGB values of last desired color in the shade, say light pink for this example (i. fill3 command working strangely?. To get a visual idea where the data lies, I plotted the individual series as patches (limited by min and max) on top of each other with a semitransparent color. [TR,fileformat,attributes,solidID] = stlread (filename) also returns the file. fill3(X,Y,Z,C) fills three-dimensional polygons. Here's a small example for an arbitrary line. To plot one region, specify X, Y, and Z as vectors. * ALPHA : scalar that defines the. 6)&(x+z>1. you can normalize by the global maximum value of the triangles in the fill3 line. Description example alpha value sets the face transparency for objects in the current axes that support transparency. Then just call patch or fill3 with the coordinates of those points, and whatever color you wish to fill it in with. ,Xn,Yn,Cn) plots multiple two-dimensional filled polygonal regions on the same axes. Hi there, I'm new to computing in MATLAB and I've been trying to get my head around the axes handle and figure handle. See below for a comparison of those three cases with painters vs the default OpenGL Renderer. 1. plotting scatter3 and surf plots from loop in matlab. Usa la función rectángulo para dibujar un círculo. Visualize the wind patterns by plotting the data in polar coordinates using the polarscatter function. Patches — Specify a different transparency value for each face and edge. You could duplicate the y/z points, and have two planes of x points, then just fill one fat shape instead of 20 thin ones. But what you are trying to do can easily be accomplished by using EZMESH to plot a parametric surface, like the following. I still think a one liner is nicer than several. You are drawing each point with a separate call to scatter3. If X, Y, or Z is a matrix, fill3 develop n polygons, where n is a number of columns in the matrix. So far, i have created a plane with fill3, resulting a parallelipiped shape (matchbox) (for the record, a 2d place could work also, using fill3 with 4 points). If C is a row vector, length (C). Theme. The loop runs in parallel when you have the Parallel Computing Toolbox™ or when you create a MEX function or standalone code. Learn more about fill area between two curves MATLAB Hi, I know this question has been asked many times but I've tried almost every solution It's been posted and didn´t worked. fill3 command working strangely?. 1 Answer. The vertices of the polygon are specified by triples of components of X, Y, and Z. . This function plots the given datasets in a single figure and axis, and resembling the cover of Joy Divisions' Unknown Pleasures by Peter Saville (and in many other newspapers, journals, etc. . For example, plot two lines and a scatter plot. C is a vector or matrix used as an index into the colormap. Plotting function in MATLAB. Hi, I have data matrix with NaN, and I want to fill the polygon colored. fill3 (X,Y,Z,C) plots filled polygonal regions on 3-D axes as Patch objects with vertices at the ( x, y, z) locations specified by X, Y, and Z. fill3 (X,Y,Z,C) plots filled polygonal regions on 3-D axes as Patch objects with vertices at the ( x, y, z) locations specified by X, Y, and Z. fill (X1,Y1,C1,. [255, 192, 203]) and then scale the values down to [0,1]. How can i make multiple surfaces with fill3In the pictures below you can see blue rectangles plotted using fill3. Copy. I want to plot a cube of side length 10, that would be symmetrical from -5 to 5 and not -6 to 4. If C is a row vector, length (C) must equal size (X,2) and size (Y,2); if C is a column vector, length (C) must equal size (X,1) and. However, I need to update the position of this object over time. If you get stuck, let me know where I can help. m'. Create a set of 3-D points and compute the Delaunay triangulation using the delaunay function. Denote these values as gmax, gmin, then we can normalize the entire data set according to these values. Syntax. Here is an example that shows the effect: Theme. Specify a color name or a short name from the table below, or specify one RGB triplet. Is there a way to e. % Original Line. Example: x=0:0. patch (x', y', z', 'r') hold off. 01:2,0:0. fill3 closes the polygons by connecting the last vertex to the first when. h1=fill3 (X,Y,Z,C) 4x1 Patch array: Patch. I want to plot a cube of side length 10, that would be symmetrical from -5 to 5 and not -6 to 4. I am new to this and trying to make it look pretty! I wanted to have the red and blue plots display together, and then place a point on one of them; placing a green point on an intersection would be cool. If X, Y, or Z is a matrix, fill3 creates n polygons, where n is the number of columns in the matrix. FaceVertexCData is the property I use to change the vertex-wise color data for patch objects in. The plot3 calls draw circles around the tops of them to make the edge more visible. fill3(X,Y,Z,C) fill3(X,Y,Z,ColorSpec) fill3(X1,Y1,Z1,C1,X2,Y2,Z2,C2,. If you want different numbers of sides in all axes (for example a pyramid. The poly2mask function sets pixels that are inside the polygon to 1 and sets pixels outside the. 5 25. How can I also specify the border line color?Description. Learn more about 3d plots MATLAB. First we need a simple example. Patches support a variety of coloring options that are useful. You can do this using the function fill3 and referencing this answer for the 2D case to see how you have to add points on the ends of your data vectors to "close" your filled. X, Y, and Z triplets specify the polygon vertices. After due consideration of my goal of detecting a point (x,y,z) inside a 3d volume (X,Y,Z), I decided on a simple two-step approach. e. A value of 0 makes the objects transparent, and value of 1 makes the objects fully opaque. Description. The presence of NaN make matlab only draws the outline for the surface; the second surface is ok. To create one patch, specify X and Y as vectors. The function defines the position of each marker as the [x y] pair of coordinates in the matrix, as the. This will update the black line without. fill3 (X,Y,Z,C) plots filled polygonal regions on 3-D axes as Patch objects with vertices at the ( x, y, z) locations specified by X, Y, and Z. Filled three-dimensional polygons. fill3(X,Y,Z,C) fill3(X,Y,Z,ColorSpec) fill3(X1,Y1,Z1,C1,X2,Y2,Z2,C2,. What is the way to do this on MATLAB? I attempted to use fill3 and a mesh but the result was not very good [x,y,z] = meshgrid(0:0. The polygon has no isolated points or edges, nor does it have dangling edges. Also i want the circle to be transparent (i think alpha command ) Please help. If potential cannot verify that V is a gradient field, it returns NaN. That eliminates the if test each pass at the cost of a little code upfront that duplicates that in the loop. To plot multiple regions, specify X, Y, and Z as matrices where each column corresponds to a polygon. If Y is a scalar, then potential expands it into a vector of the same length as X with all. However, the graph is 2-dimensional, with the points color-coded by z-coordinate. In MATLAB, a scalar is a variable with one row and one column. ,'PropertyName',PropertyValue) h = fill3(. "If X, Y, and Z are matrices of the same size, fill3 forms a vertex from the corresponding elements of X, Y, and Z (all from the same matrix location), and creates one polygon from the data in each column. But now I need to adapt it to accept multiple other shapes (hexagon, pentagon, etc. fills two-dimensional polygons specified by with the color specified by. example. determines the color of the patch. 2. Learn more about TeamsTeams. However, I am struggling how exactly should I define the interpolation to get the interpolated plane. For example, fill3(X,Y,Z,C,'LineWidth',2) specifies a two-point border around all the patches. Copy. 6); fill3(x(:),y(:),z(:), 'r') box on grid on Using plot3 also was not very good. . * ORIGIN: 3-elements vector that defines the start point of the cube. h2=fill3(X,Y,Z,[0 0 1]) note that the order of introduction of points matters, if you jump to an opposite vertex the square will look like a bow tie. 此 MATLAB 函数 将填充多边形区域绘制为补片,其顶点位于由 X 和 Y 指定的 (x,y) 位置。 要绘制一个区域,请将 X 和 Y 指定为向量。 要绘制多个区域,请将 X 和 Y 指定为矩阵,其中每列对应一个多边形。. fill(X,Y,C) Cis a vector or matrix used as an index into the colormap. Let us now use the plotting capabilities of MATLAB to plot the plane and the line. thanks for noticing. When you use a colormap, C is the same size as Z. I'm writing code in which I use MATLAB's fill command to plot 2D shapes. Y = [2 3 4; 6 1 5; 7 4 9]; a = area (Y); Modify the second area to be green with thick red edges. When the SeriesIndex value is a number, MATLAB uses the number to calculate an index for automatically assigning colors when you call plotting functions. However, when using the fill command, I find it's filling up unwanted spaces. 04,-2. 1) detect the presence of the point in the X,Y perimeter with inpolygon. The fill3 function creates flat-shaded and Gouraud-shaded polygons. . You can check this by getting the Renderer of the current figure before and after plot setting the FaceAlpha. The distinction between row and column vectors is crucial. If C is a 1-by-3 vector, it is assumed to be an RGB triplet, specifying a color directly. MATLAB Graphics Formatting and Annotation Axes Appearance. I am not sure if this is because I am misunderstanding how data is stored in the fill3. To better view the curved surface of the sphere, vary the light across. 01:2*pi; %#initialize x array. C determines the patch colors. fill3(x,y,z,blue, 'FaceAlpha',0. % the origin (x, y, and z). C determines the color of the patch. example. So i want to find a way to fill. matlab function 3d plot geometry Share Improve this question Follow Filled 3-D polygons in 3-space. xc=1; yc=1; zc=1; % coordinated of the center L=10; % cube size (length of an ed. 32,0] The resulting plot is as shown: How can I create a surf. First, specify the transparency values by setting the AlphaData property to an array the same size as the ZData property. Theme. Accepted Answer. Programs in the Book. g. Based on your location, we recommend that you select: . I have a function that plots a circle in 3d if given the center the normal of the circle and the radius. 2) If the x,y point is inside the bottom perimeter of the region as (X,Y, Z=Z0), then test for min (Z) <= z <= max (Z), where Z. The function returns the x -, y -, and z - coordinates as three (n+1) -by- (n+1) matrices. You define a patch by specifying the coordinates of its vertices and some form of color data. This MATLAB function plots filled polygonal regions on 3-D axes as Patch objects with vertices at the (x,y,z) locations specified by X, Y, and Z. To plot two lines with different line widths, you can use either of these approaches. Position of markers, specified as an M-by-2 matrix, where each row is an image coordinate pair of the form [x y], or an M-element vector of one of the points objects listed on the Point Feature Types page. Create a light by calling the lightangle function and specifying an azimuth angle of –45 degrees and an elevation angle of 30 degrees. 例如, fill3 (X,Y,Z,C,'LineWidth',2) 指定一个围绕所有补片的两点边框。. patch(X,Y,Z,C) creates a patch in three-dimensional coordinates. 영역을 여러 개 플로팅하려면 X, Y, Z 를 각 열이 하나의 다각형에. Returning NaN does not prove that V is not a gradient field. Answers (1) You might try using the painters Renderer. I'm trying to fill a portion of a specifically segmented sphere (pictured below) but the fill3() and patch() functions aren't working because they use polygon vertices as the inputs, and the polygons below are created by the intersection of 2 curved lines. The first vector is the top left corner. )To create colors manually and assign them to the marker values, start with the RGB values of last desired color in the shade, say light pink for this example (i. As shown above, the base of my 3D benchy. fill3(X,Y,Z,C) fills three-dimensional polygons. Polar Plots. view (-25, 30) This draws a prism with green sides and red ends. fill3() does not fill between planes. fill3(___,Name,Value) は、1 つ以上の名前と値の引数を使用してプロパティを設定し、Patch オブジェクトを変更します。パッチは、前述の構文にある任意の入力引数の組み合わせを使用して指定できます。たとえば、fill3(X,Y,Z,C,'LineWidth',2) は、すべてのパッチの周囲に 2 ポイントの境界線を指定します。Teams. If X, Y, or Z. It is similar to the Windows 8 emulator but is limited to the Windows 7. I think someone should write a book like "MATLAB a bunch of undocumented stuff", because it is not the first time I encounter some problem, which can be solved, but the solution isn't. Learn more about matrix, matrix manipulation, matrix array, for loop, for MATLAB I need to fill matrix r, where r=r(z), and ri is constant. Hi, I have the following code in Matlab and the red helix is coming out choppy. On the left hand side there is a clear figure which is I would like to obtain. it is already filled, let me explain: when you generate a surface with commands like fill3 patch surf surface. Please see attached file. This MATLAB function fills three-dimensional polygons. 7]) shape in a figure, which I generate using "fill. sphere ( ___) plots the sphere without returning the. This table classifies and illustrates the common graphics functions. clear all. Patches support a variety of coloring options that are useful. In this syntax, a hole is defined as an area of dark pixels surrounded by lighter pixels. A number of MATLAB ® functions create patch objects — fill, fill3, isosurface, isocaps, some of the contour functions, and patch. The function returns the x -, y -, and z - coordinates as three (n+1) -by- (n+1) matrices. Tags ode45; input arguments; Community Treasure Hunt. fill3(X,Y,Z,C) fill3(X,Y,Z,ColorSpec) fill3(X1,Y1,Z1,C1,X2,Y2,Z2,C2,. This MATLAB function plots filled polygonal regions on 3-D axes as Patch objects with vertices at the (x,y,z) locations specified by X, Y, and Z. 1. 2-D Graphics Functions (pp 105-154) 3-D Graphics Function (pp 159-163) Contact Your Sales Rep. In summary, I am trying to redraw a large fill3 object as part of an animation. zlabel (txt) labels the z -axis of the current axes with the text, txt . The isosurface does not clear the previous plot. The vector or array contains a scalar value for each vertex in the isosurface. 01:2); ineq = (x>=1)& (y>0. fill ( ___,Name,Value) modifies the patches using one or more name-value arguments to set properties. This page also shows you how to do it with patch (). The code that I am using to plot the shapes is as follows:The issue appears to be that you have overwritten the fill3 function by naming your script/function fill3 as well. Then use Java’s setWindowOpacity method to set the window’s transparency value. % box in the z-direction. MATLAB Graphics 2-D and 3-D Plots Surfaces, Volumes, and Polygons Surface and Mesh Plots. fill3 (X,Y,Z,C) plots filled polygonal regions on 3-D axes as Patch objects with vertices at the ( x, y, z) locations specified by X, Y, and Z. fill3 (points (1,:), points (2,:), points (3,:), 'b') colors the circle shape in blue. X, Y, and Z triplets specify the polygon vertices. ,'PropertyName',PropertyValue) h = fill3(. Find more on Ordinary Differential Equations in Help Center and File Exchange. colorbar ( ___,Name,Value) modifies the colorbar appearance using one or more name-value pair arguments. Q&A for work. To link the colors of the rectangles to a colobar, you can define a color map which will be a nx3 matrix of RGB values. h2=fill3(X,Y,Z,[0 0 1]) note that the order of introduction of points matters, if you jump to an opposite vertex the square will look like a bow tie. To plot multiple regions, specify X, Y, and Z as matrices where each column corresponds to a polygon. Pass the predefined colormap name, hot, to the colormap function. ) fill(. To plot one region, specify X, Y, and Z as vectors. . Call the tiledlayout function to create a 2-by-1 tiled chart layout. If X, Y, or Z is a matrix, fill3 creates n polygons, where n is the number of columns in the matrix. Theme. 3. 0. If X, Y, or Z is a matrix, fill3 creates n polygons, where n is the number of columns in the matrix. 7:0. How do you use the fillup3 function to make a shape? I am able to make the flat shape using the plot3 command, but the fillup3 just produces just a black line. can't add axis labels. Building off of @gnovice's answer, you can actually create filled plots with shading only in the area between the two curves. the height of the cone and the axis of the cone (the axis is not predefined as x,y,z axis. So you can create a polygonal region in x and y, with a fixed z. fill3 (X,Y,Z,C) plots filled polygonal regions on 3-D axes as Patch objects with vertices at the ( x, y, z) locations specified by X, Y, and Z. For the latter you need the fliplr(A) command. alpha alphadata varies the transparency across all image, patch, surface, and. X, Y, and Z triplets specify the polygon vertices. If you are using MATLAB R2016b you can use the new fimplicit3 command: Theme. Then plot the filled region in red. Syntax. Use the alpha function to set the transparency for all image, patch, and surface objects in the current axes. png slices and creates 3D models from the slices. fill3(X,Y,Z,C) fills three-dimensional polygons. I have a function that plots a circle in 3d if given the center the normal of the circle and the radius. When the SeriesIndex value is a number, MATLAB uses the number to calculate an index for automatically assigning colors when you call plotting functions. 5)&(z>=0. I want to highlight an area on a surface plot and fill3 would do the job but I am not sure how to find the 3D points i need. I have a gray ([. If X, Y, or Z is a matrix, fill3 develop n polygons, where n is a number of columns in the matrix. Learn more about fill3, interpolation, rectangular elementThis MATLAB function plots filled polygonal regions on 3-D axes as Patch objects with vertices at the (x,y,z) locations specified by X, Y, and Z. fill (X,Y,C) creates filled polygons from the data in X and Y with vertex color specified by C. Description. example. What this implies you can retrieve the XData and YData coordinates of the first child of the output of viscircles, get rid of the nan at the end, and fill () 'color', 'r'); xd = h. The fill3 function creates flat-shaded and Gouraud-shaded polygons. "If X, Y, and Z are matrices of the same size, fill3 forms a vertex from the corresponding elements of X, Y, and Z (all from the. C specifies color, where C is the vector or matrix. xlabel ('Bootstrap Replicates') % x-axis label. FaceAlpha = 0. Check the matlab function area which can help you solve your particular problem. If you'll do it for an hellicopter, you will see a disk like shape from above (the aerea between. Is there any other way to generate. Patches — Specify a different transparency value for each face and edge. Thanks for your response, but I am wondering to generate cylinders using two point and their coordinates in limited intervals[a,b,c]. %# create some data data = randn (20000,1); %# create 20,000 corresponding x-values so that the last one is 50 - works for any number of data points x = linspace (1,50,length (data)); %# plot plot (x,data)viscircles (ax,centers,radii) dibuja círculos en los ejes que especifica ax. Fill BetweenOne question I'm often asked is how to fill the area between two plotted curves. I'm writing code in which I use MATLAB's fill command to plot 2D shapes. By default, the lighting method is flat, which applies light uniformly across the faces of the sphere that are facing the light source. fill3 close the polygons by linking the last vertex to the first when necessary. 7. Reissuing the zlabel command causes the new label to replace the old label. I am trying to achieve something similar to Matlab's fill3 function in ILNumerics and output to an SVG file. for i = 1:18.