Re: 3D plot from a matrix

[Andy Buckle]

On 15 May 2014 14:37, guido.bonalumi <address@hidden> wrote:

Thank you for the tips... Can you be more specific about what your code does?
In particular I am interested in these three lines:

/ [XX YY]=meshgrid(X,Y);

 Z=XX.^2+YY.^2; %dummy data to plot.

 surf(XX,YY,Z)/

Thanks again!

surf does the plotting. meshgrid takes a 1D array for each of X and Y and makes a 2D array. XX, YY and Z then all have the same number of rows and columns. corresponding positions in those arrays give the X,Y and Z coordinates. This is required by the 3D plotting functions. It's also handy for me to generate a function of 2 variables, Z, because I don't have your data. For more info on the functions type the following into octave

help meshgrid

help surf

--
/* andy buckle */