How do I find a file name containing a particular string in a given directory and read this present file and write into other folder.

Question

praveen chandaliya 2017-9-27

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回答： Amirali Kamalian 2019-8-21

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q.PNG

i have folder in this different .jpg files are present with specified name. i want to read file with particular name not fullfile name .

like in folder i have AKS_9129.jpg file present but i want to read with 9129.jpg name . not include AKS_9129.jpg

path15 = strcat('E:\folder\',num2str(9129),'.jpg');
im15 =  imread(path15);
error occured file is not found.

i have enclosed folder structure.

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Answer 1

Amirali Kamalian 2019-8-21

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You can make the code simpler by replacing this line

X = ~cellfun('isempty',strfind(N,num2str(9129)));

with

X = contains(N,num2str(9129));

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Answer 2

Stephen23 2017-9-27

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编辑：Stephen23 2017-9-27

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Method one: strfind:

P = 'E:\folder';
S = dir(fullfile(P,'*.jpg'));
N = {S.name};
X = ~cellfun('isempty',strfind(N,num2str(9129)));
I = imread(fullfile(P,N{X}))

Method two: dir:

P = 'E\folder';
F = sprintf('*%i*.jpg',9129);
S = dir(fullfile(P,F));
N = S.name;
I = imread(fullfile(P,N));

Note that in both cases you will need to check how many matching filenames there are. You should also read the MATLAB documentation:

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

and this forum, e.g.:

https://www.mathworks.com/matlabcentral/answers/57446-faq-how-can-i-process-a-sequence-of-files

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praveen chandaliya 2017-9-27

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IF TWO FILE MATCH THAN THIS ERROR X =

1 0 0 0 1 0 0 0 0 0 0 0

Error using imread (line 349) File "E:\actualdata\9129.JPG\AKS_9129.jpg" does not exist.

Error in folderread (line 10) I = imread(fullfile(P,N{X})); HOW TO SOLVE THIS ERROR

Stephen23 2017-9-27

编辑：Stephen23 2017-9-27

在 MATLAB Online 中打开

@praveen chandaliya: if two or more files match that number then you have to decide what to do. You might want to process both/all of them, or throw an error, or ignore them. How am I supposed to know what you want to do in that situation?

In any case I would highly recommend that you read the link to the documentation that I gave. The method you are trying to attempt is rather strange, and you would likely be much better off using one of the more standard ways to process a sequence of files.

The error message that you show tells me that you have used some different code than what I showed you, because in your error message 9129.JPG appears twice (did you read the message?):

E:\actualdata\9129.JPG\AKS_9129.jpg

My code does not do that, so you need to fix your code.

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