倍频程：“加载：无法加载矩阵常数”

Question

I would like to save and load a set of images in Octave / Matlab. The general instructions given in the FAQ do not seem to work with saving and loading (octave 3.2.4, Ubuntu 12.04).

Namely, using bg_header_mwlogo_notag.jpg

images = cell(1, 1);
for i=1
    images{i} = imread('/tmp/bg_header_mwlogo_notag.jpg');
end
save images;
load images;

gives:

error: load: failed to load matrix constant
error: load: trouble reading ascii file `'
error: load: reading file 
error: load: cell array element had unexpected name
error: load: failed to load cell element
error: load: trouble reading ascii file `images'
error: load: reading file images

How can I save and load several images to and from one file?

Answer 1

There is some problem loading the ASCII representation of the matrix from file. If you rather issue

images{i} = double(imread('/tmp/bg_header_mwlogo_notag.jpg'));

it actually stores the numeric values instead, which is perfectly fine for Matlab. You can easily check that the two representations are equal. On the other hand, loading such numeric version of the matrix from file succeeds.