How change part of a text in fprintf, title and subtitle?

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Antonio Trujillo-Ortiz 2014-9-28

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评论： Stephen23 2014-9-29

Hi all,

I need your help. How one can change as needed part of a text in the fprintf, title and subtitle, and leaving the another one fixed.

I would apprteciate any hint on this. Thx.

Antonio

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Answer 1

Image Analyst 2014-9-28

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Just blast over it with the new string. I mean, you put the string in there so somehow you know what you put it. So you could just make up a new string

caption1 = sprintf('This is %d', 10);
title(caption1);
% Now change it.
caption1 = sprintf('This is %d', 99);
title(caption1);

If, for some reason you don't know what's there, then you can retrieve it

existingCaption = get(gca, 'title'); % Or something like that

Then use strfind() or indexing to parse and change the string elements you want changed.

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Image Analyst 2014-9-29

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Antonio's response to me from moved from an "Answer" to a Comment to me:

Hi Image Analyst,

Thanks for your soon answer. What with a title or subtitle? How you can keep fixed part of a text but the another one changing as you need?

Eg.

Suppose in a case you need a title as:

As you knows: this is the same.

and in another case,

As you knows: this must change as you need.

First part is fixed, the another is different

Antonio

Image Analyst 2014-9-29

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Sure, just do this:

caption1 = 'As you knows: this is the same.';
title(caption1);
% Now change it.
caption2 = As you knows: this must change as you need.
title(caption2);

or, if you have the first part as a string:

str = caption1 = 'As you knows: ';
caption1 = sprintf('%s this is the same.', str);
title(caption1);
% Now change it.
caption2 = sprintf('%s this must change as you need.', str);
title(caption2);