title: Error: Input grid is not a valid Meshgrid
body: <p>I have a question. So I have a 3D matrix of XxYxZ = 10x5x20. I want to plot this matrix with the help of isosurface. So first I need to create a mesh grid, but here comes the first problem when I say:    <code>[X,Y,Z] = meshgrid(1:10,1:5,1:20)</code>    I get a grid of 5x10x20, but I want 10x5x20. Why is this? My idea was to just change the X and Y    <code>[Y,X,Z] = meshgrid(1:10,1:5,1:20)</code>    When I try to plot the matrix with the help of this grid:    <code>isosurface(X,Y,Z,M)</code>    I get the error "Input grid is not a valid MESHGRID" </p>
  
  <p>What is the problem?</p>
  
  <p>Thank you</p>