loop save new name and save .mat
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This is main function
function [] = READIMAGEFORAREA ()
srcFiles = dir('C:\Users\xzaa\Documents\MATLAB\bwwalk2\*.jpg'); % the folder in which ur images exists
j=1;
for i = 1 : length(srcFiles)
filename = strcat('C:\Users\xzaa\Documents\MATLAB\bwwalk2\',srcFiles(i).name);
I = imread(filename);
imshow(I);
drawnow;
AREAPICTURE (I,j);
j=j+1;
end
end
and 2nd function
function [] = AREAPICTURE (BW,i)
BWAREA = bwarea(BW);
j=num2str(i);
save('AREA.mat',strcat('BWAREA00'),j);
end
I want to save in file .mat and save many object in .mat in code that error loop in program
this error Error in AREAPICTURE (line 4) save('AREA.mat',strcat('BWAREA00'),j);
Error in READIMAGEFORAREA (line 9) AREAPICTURE (I,j);
1 个评论
回答(2 个)
Jan
2017-1-24
Your code:
function [] = AREAPICTURE (BW,i)
BWAREA = bwarea(BW);
j = num2str(i);
save('AREA.mat',strcat('BWAREA00'),j)
This is equivalent to the call (when i=7):
save AREA.mat BWAREA00 7
and tries to save the variables "BWAEREA00" and "7" to the file called "AREA.mat". Due to the lack of comment we have to guess the intention of this code. A bold guess:
function AREAPICTURE(BW, index) % Use "i" for the imaginary unit only
BWAREA = bwarea(BW);
save(sprintf('BWAREA%03d.mat', index), 'BWAREA')
3 个评论
Walter Roberson
2017-1-25
function AREAPICTURE(BW, index) % Use "i" for the imaginary unit only
BWAREA = bwarea(BW);
field = sprintf('BWAREA%d', index);
datastruct.(field) = BWAREA;
save('AREA.mat', '-struct', 'datastruct', '-append')
If you were to use a -v7.3 .mat file then you could handle this a bit more cleanly using matFile()
5 个评论
Walter Roberson
2017-1-25
Possibly the problem occurs while reading the 21st image. You should put in some debugging:
function [] = READIMAGEFORAREA ()
projectdir = 'C:\Users\xzaa\Documents\MATLAB\bwwalk2'
srcFiles = dir( fullfile(projectdir, '*.jpg') );
IGNORETHISVARIABLE = []; %the file needs to exist
save( 'AREA.mat', 'IGNORETHISVARIABLE');
for index = 1 : length(srcFiles)
filename = fullfile(projectdir, srcFiles(index).name );
fprintf('about to read image #%d: "%s"\n', index, filename);
I = imread(filename);
fprintf('image #%d read\n', index);
imshow(I);
drawnow;
AREAPICTURE(I, index);
end
function AREAPICTURE(BW, index)
BWAREA = bwarea(BW);
field = sprintf('BWAREA%d', index);
datastruct.(field) = BWAREA;
fprintf('about to save field %s\n', field);
save('AREA.mat', '-struct', 'datastruct', '-append')
fprintf('saved field %s\n', field);
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