Interpixel Redudancy with Huffman

I try to compress image aligned matches.tiff (558x558 uint8) I make codes in mfile

f = imread ('Matches_Aligned.tif');
%figure, imshow (f);
e = mat2lpc(f);
figure, imshow(mat2gray(e));
entropy(e)

c = mat2huff (e);
cr = imratio (f,c)

until entropy (e), I get ans = 0.9978

but then, when I compile next code, the next codes are

c = mathuff(e)
cr = imratio (f,c)

I get error warning like this

??? Undefined function or method 'huffman' for input arguments of type 'double'.

Error in ==> mat2huff at 59
map = huffman(double(h));          % Make Huffman code map

pliss hepl me,,how to solve this error?

thanks

Answer 1

[Walter Roberson]

There is no MATLAB routine named "huffman". The program must be expecting you to get the routine from some other source. You will have to read the installation instructions for the "mathuff" that you found (somewhere) to see what else you should have added and in what directories.