hello guys,i have matlab version r2013a , i have a project image compression,and i am encountered a problem,its the "zigzag function",its not exist in this version or what? please any help for me,for use this function

XZzag=blkproc(XdctQ,[R R],'zigzag(x)');

Answer 1

[Adam]

I have no idea what zigzag is. It doesn't sound like a Matlab function and it certainly isn't in my version.

By the way, blkproc is deprecated. You should use 'blockproc' now.

[ali al-hallal]

yes i used it,but i have the same error, in this function i mean "code to read Matrix in a ZigZag Scanning in images",but in some code is it used directly by a function named zigzag like this :

out=zigzag(in);

[Adam]

Where does zigzag come from? Is it in a toolbox or is it some 3rd party code you picked up or a function you wrote yourself?

I have the Image Processing Toolbox, but it isn't in there as a function

Taking a quick look I assume it is this that you are/were using:

http://uk.mathworks.com/matlabcentral/fileexchange/46029-zigzag-scanning-of-a-matrix

If you have upgraded Matlab your old path does not follow through to the upgraded version so you will need to add the folder containing this function (and any others you use) to your path in the new version of Matlab.