Naming figures with existing filename

Hello Community,

I am having trouble getting the naming of my figures right. What I want to do is use part of a variable that contains an existing file name. For example: baseFileName = IMG_1234.jpg, and I want the title for the subsequent figure to read as, 'RGB 1234'. I have tried various iterations of code, an example of which is:

figure('name', 'RGB (regexpi(baseFileName, (?<=IMG_)\d+', 'match', 'once'))', 'numbertitle', 'off');

but obviously the section referring to 'regexpi(baseFileName,...etc.' would also appear in the title which is not what I want. The regexpi line of code has worked sucessfully elsewhere so I know this is correct, but I'm struggling to insert it in to the correct part of naming the figure.

This is for a script that will be run a few times using different images and I want to store the images after with their correct ID in the title for future reference.

So, can anyone offer some useful advice please?

Regards,

10B.

Answer 1

[Ilham Hardy]

Perhaps this might works?

figT = ['RGB ' (regexpi(baseFileName, (?<=IMG_)\d+', 'match', 'once'))];
figure('name', figT, 'numbertitle', 'off');

[10B]

Hello Illham,

Thanks for your comment. Actually I tried something like this earlier:

ImgName = regexpi(baseFileName, '(?<=IMG_)\d+', 'match', 'once');

which produces the variable ImgName = 1234, then I wrote:

figure('name', ImgName, 'numbertitle', 'off');

which writes the '1234' to the figure title, but... the 'RGB ' part is missing.

When I tried your version as above, I get the following error:

   figT = ['RGB ' (regexpi(baseFileName, (?<=IMG_)\d+', 'match', 'once'))];
                                           |
  Error: Unexpected MATLAB operator.

which unusually is saying that the 'less than' operator is in error - so, I'm still not sure of the way forward!

[Ilham Hardy]

Hello,

Apparently you've missed a colon in your example.

It should be:

figT = ['RGB ' (regexpi(baseFileName, '(?<=IMG_)\d+', 'match', 'once'))];

instead of

figT = ['RGB ' (regexpi(baseFileName, (?<=IMG_)\d+', 'match', 'once'))];

Hope this helps, IH

[10B]

Ah - the curse of the missing colon! (or single inverted comma). That's it, sorted perfectly. Thanks a lot for your help.

Answer 2

[Image Analyst]

You're probably referring to the annoying feature of title where it treats the letter following an underline as a subscript. You can turn off that annoying default feature by using the 'Interpreter' option in title(), xlabel(), or ylabel():

baseFileName = 'IMG_1234.jpg';
[~, baseNameNoExtension, ~] = fileparts(baseFileName);
title(baseNameNoExtension, 'Interpreter', 'none'); % No subscript now - YAY!!!

Or if you just plain don't want the underline, replace it with a space:

baseFileName = 'IMG_1234.jpg';
[~, baseNameNoExtension, ~] = fileparts(baseFileName);
baseNameNoExtension(baseNameNoExtension == '_') = ' ';
title(baseNameNoExtension, 'Interpreter', 'none');

[10B]

Do you know Image Analyst, your suggestion wasn't exactly what I was looking for, but, as it turns out is very good information in any case as I am now going to use this in the script to for generating the 'caption' title for the figure as well. Great stuff - thanks a lot for your input!