Removing /tmp plot files

[Fredrik Lingvall]

I generate movies by generating a sequence of images
using the pm3d mode of gnuplot similar to:

for n=1:N
 Im = gen_new_image(n); 
 image(x,z,Im); %hacked version of image.m that uses pm3d mode.
 eval(['print("' png_path 'snapshot_' num2str(n) '.png", "-dpng");']);
end

My problem is that octave leaves a lot of oct-* files in the /tmp dir
that after a while is full. Is there a way to make octave remove these
files after the plot is created?

/Fredrik