Introducing element * in sprintf()

Hello

I am trying to introduce the element * to the function sprintf in MATLAB.

My code look like this

ss=sprintf('%s//Segments//Image_TrueColor_%d',Pathname,*)

I could set the code to read in the names of the files at the point of the unknow number name but is it possible just to introduce the * (select all) command ?

Thank you in advance

Answer 1

[Walter Roberson]

That is not really a question about sprintf(), that is a question about the routine that you are using the resulting string. sprintf() just does string creation based upon the parameters passed to it, and it has no knowledge of files.

prefix = fullfile(Pathname, 'Segments');
fileinfo = fullfile( prefix, 'Image_TrueColor_*' );
filenames = strcat( prefix, {fileinfo.name} );

The result would be cell array of strings, one (complete) file name per entry.

For most operations you would then need to loop over those file names. Very few of the routines can operate on multiple files at the same time.

[Dimitris M]

Hello

Thank you for your guidance but maybe my question was not very clear. The '*' is supposed to be a number that I do not know.

Your code works fine up to the point of

fileinfo = fullfile( prefix, 'Image_TrueColor_*' );

The things is that is should read something like

'Image_TrueColor_10' but it reads 'Image_TrueColor_*' which does not exist.

MATLAB returns

Attempt to reference field of non-structure array.

Can you guide me from this point ?

Thank you in advance !

[Walter Roberson]

Sorry, should have been

fileinfo = dir( fullfile( prefix, 'Image_TrueColor_*' ) );