a way to use data from a function in another function without running whole program

I am working on a code that using K-Means and there are For loops . This code take hours to make results. These results I need to use it, But It will be improper for me to run the code from beginning every time. I need to know how can I save time, and a way to begin the code from the new functions that I add but it takes the results from old functions. I hope that my question is clear enough. Thanks in advance,

Answer 1

[dpb]

No magic is available, sorry. You'll have to save the results when they're computed and then write the function(s) to be able to take those results if available and use them.

See

doc save
doc load

for probably the simplest way to write/read variables without any more fuss than necessary.

[eman]

Thanks dpb

I have used this on .m file

 Codebook.Centers=Centers;
 Codebook.K=K;
 Codebook.blockSizeR=blockSizeR;
 Codebook.blockSizeC=blockSizeC;
 save Codebook.mat Codebook;

Then I have created another .m file with the other functions and use these

load Codebook;

ِand I have dfined the variables but I got an error message

[dpb]

Well, nothing looks terribly out of place there but we can't see your workstation from here so "what error message?"

Show the precise, full error in context...

[eman]

I've splitted the code in to Two.m files the first file code is:

clc;
clear all;
close all;
fontSize = 20;
TiledIm=[];
TrnImgPath='G:\Master_Students\Iman\UIUC\PNGImages\TrainImages\';
blockSizeR=16;
blockSizeC=16;
K=70;
for i=1:100
    rgbImage=[TrnImgPath 'pos-' num2str(i) '.PNG'];%Reading positive Pictures
    rgbImage=imread(rgbImage);
   rgbImage =im2double(rgbImage);
  % Display image full screen.
  % imshow(rgbImage)
  tmpTile = im2col(rgbImage,[blockSizeR blockSizeC],'sliding');
  tmpTile = tmpTile';
  TiledIm=[TiledIm; tmpTile];
end

opts = statset('Display','iter','MaxIter',400);
[IDX,Centers] = kmeans(TiledIm,K,'distance','sqEuclidean','Options',opts);
%///////////////////////////////////////////////////////////////////
%show centroids plot
%for i=1:K
  % subplot(8,7,i);
 %  imshow( reshape(Centers(i,:),[blockSizeR blockSizeC]));
%end
%///////////////////////////////////////////////////////////////////
%/********codebook*/
 Codebook.Centers=Centers;
 Codebook.K=K;
 Codebook.blockSizeR=blockSizeR;
 Codebook.blockSizeC=blockSizeC;

   save Codebook.mat Codebook;

And the second file code is

clc;
clear all;
close all;
%%load codeboock Centers and parameters
load Codebook;
fontSize = 20;
TiledIm=[];
TrnImgPath='G:\Master_Students\Iman\UIUC\PNGImages\TrainImages\';
blockSizeR=16;
blockSizeC=16;
K=70;

%convert centroids to image
for i=1:K
  CImg= col2im(Centers,[256 2125], 'sliding');
   imshow( reshape(Centers(i,:),[blockSizeR blockSizeC]));
end

when i run the second file this error message appeared:

Undefined function or variable 'Centers'.

Error in ToLoad (line 16)

 CImg= col2im(Centers,[256 2125], 'sliding');

[per isakson]

preallocate TiledIm to its final size, it will save some time

&nbsp

Replace

    Centers

by

    Codebook.Centers

You saved a structure named Codebook