summing every twelve files from multiple .mat files
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Hi everyone,
I am new to Matlab. This may look trivial. I have thousands .mat matrix files of size K(180, 360). I want to do two things:
- Read these files and summing every twelve files
- Clip the result from size (180, 360) to something like (100,100)
- save the results
This is what I have done:
dirname = uigetdir;
Files = dir(fullfile(dirname,'*.mat'));
Total = zeros(180,360);
N=length(Files);
for k=1:N
ppm.Frame=load(Files(k).name)); % read the files
while k<= 12;
Total = Total + pp.Frame % do the summing of first twelve files here
k = k+1;
else
k=0;
% How do I resize the result here?
save(Total)
clear Total
end
Help would be highly appreciated.
1 个评论
Jan
2015-4-6
What exactly is "K(180, 360)"? How can files be added? Do you mean that the MAT-files contain a variables called "K", which has the size [180 x 360]? And you want to create the sum over these values? How is "every 12 files" defined? In alphabetical order? How should the clipping be applied exatcly? Do you want to remove the right, left, upper, lower rows and columns?
采纳的回答
I've formatted your code properly. As soon as you do so, you can see, that there cannot be an else ibn a while loop. The for loop counter k should not be modified inside the loop - you will see a corresponding warning in the editor.
The code contains more problems, e.g. you read the file into "ppm.Frame", but try to access ""pp.Frame". I guess, you want something similar to this:
dirname = uigetdir;
Files = dir(fullfile(dirname,'*.mat'));
N = length(Files);
count = 0;
for iFile = 1:N
if count == 0
Total = zeros(180,360);
end
count = count + 1;
FileData = load(fullfile(dirname, Files(iFile).name)); % read the files
Total = Total + FileData.Frame;
count = count + 1;
if count == 12
% It is unclear how you want to "clip" Total.
Total = ??? Perhaps resize()
% Or: Total = Total(1:100, 1:100, :);
save(Total)
count = 0;
end
end
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