IMWRITE IMWRITE Write Matrix to Image File

Usage

Write the image data from the matrix into a given file.  Note that
FreeMat's support for imread is not complete.  Only some of the
formats specified in the MATLAB API are implemented.  The syntax
for its use is

  imwrite(filename, A)
  imwrite(filename, A, map)
  imwrite(filename, A, map, alpha)

where filename is the name of the file to write to.  The input
arrays A contain the image data, map contains the colormap information
(for indexed images), and alpha contains the alphamap (transparency).
The returned values will depend on the type of the original image.  Generally
you can write images in the jpg,png,xpm,ppm and some other formats.
