Save a plot in Matlab as a matrix [duplicate]

Question

This question already has an answer here:

• Turn a MATLAB plot into image 2 answers

Just imagine you plot several dots, circles, lines in a figure. Afterwards another m file should use this plot as an input to do e.g. thresholding. I'm aware of the print command but I don't want the plot to be stored as file. I would prefer to store it in a matrix (x_dim,y_dim,3). Any ideas?

Answer 1

You should check out the functions getframe and frame2im to convert a figure or axes object to an image matrix.

Answer 2

How about save to an image? You can use getframe to get a frame object F, where F.cdata contains the RGB values. Remember to use 'border', 'tight' option to avoid capturing the borders.