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Comparision of two strings

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Jes
Jes 2015-7-14
评论： Image Analyst 2015-7-15
How to compare all the characters of the following two strings. I tried with strcmp, but it doesn't take the numbers for comparision. I have to differentiate n3 and n4 in the following lines
PATH=strcat('F:\OASIS\database\OAS1_',num2str(i,'%04d'),'_MR1\PROCESSED\MPRAGE\T88_111\OAS1_',num2str(i,'%04d'),'_MR1_mpr_n4_anon_111_t88_masked_gfc','.hdr');
N4=strcat('F:\OASIS\database\OAS1_',num2str(i,'%04d'),'_MR1\PROCESSED\MPRAGE\T88_111\OAS1_',num2str(i,'%04d'),'_MR1_mpr_n3_anon_111_t88_masked_gfc','.hdr');
Any help? Thanks in Advance

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回答（2 个）

the cyclist
the cyclist 2015-7-14
I don't understand what you are trying to do. Did you define a value for i before you ran this code? I ran
i = 3;
PATH=strcat('F:\OASIS\database\OAS1_',num2str(i,'%04d'),'_MR1\PROCESSED\MPRAGE\T88_111\OAS1_',num2str(i,'%04d'),'_MR1_mpr_n4_anon_111_t88_masked_gfc','.hdr');
N4=strcat('F:\OASIS\database\OAS1_',num2str(i,'%04d'),'_MR1\PROCESSED\MPRAGE\T88_111\OAS1_',num2str(i,'%04d'),'_MR1_mpr_n3_anon_111_t88_masked_gfc','.hdr');
strcmp(PATH,N4)
which ran to completion with no error.
  2 个评论
Jes
Jes 2015-7-14
yes . This is my code
for i=1:457
PATH=strcat('F:\OASIS\database\OAS1_',num2str(i,'%04d'),'_MR1\PROCESSED\MPRAGE\T88_111\OAS1_',num2str(i,'%04d'),'_MR1_mpr_n4_anon_111_t88_masked_gfc','.hdr');
N4=strcat('F:\OASIS\database\OAS1_',num2str(i,'%04d'),'_MR1\PROCESSED\MPRAGE\T88_111\OAS1_',num2str(i,'%04d'),'_MR1_mpr_n3_anon_111_t88_masked_gfc','.hdr');
if strcmp(PATH~=N4)
V=hdr_read_volume(PATH);
end
end
Jes
Jes 2015-7-14
Thanks for your advise. I am getting warning message. May I know the reason please?
Warning: Control
Character '\O' is not
valid.

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Image Analyst
Image Analyst 2015-7-14
Try this
differentIndexes = find(PATH ~= N4);
By the way, have you ever thought about using sprintf() for a much simpler way to build strings?
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Jes
Jes 2015-7-14
Thanks for your help. Here my baseFileName is not constant for all folders.It varies like OAS1_0001_MR1_mpr_n4_anon_111_t88_masked_gfc.hdr, OAS1_0002_MR1_mpr_n4_anon_111_t88_masked_gfc.hdr,etc for 457 folders
Image Analyst
Image Analyst 2015-7-15
Then just create the filename and search for n4 within it.
if ~isempty(fullFileName, '_n4_')
% Found the n4 file, so read it in:
V(k) = hdr_read_volume(fullFileName);
end

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