MATLAB Answers

Mr M.
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How to make long title for a plot with automatic line breaks?

Asked by Mr M.
on 17 Jun 2015
Latest activity Commented on by Jan
on 16 Aug 2018
I would like to use a very long title, which should have lots of line breaks, but I want to put line breaks automatically to achieve a kind of justified paragraph visually.

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5 Answers

Answer by Alberto
on 17 Jun 2015

Multiline can be done using this syntax:
figure;
str=['Line1', '\n', 'Line2'];
s=sprintf('Hello\nGoodbye');
title(s)

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Answer by Micke Malmström on 19 Feb 2018
Edited by Micke Malmström on 19 Feb 2018

Write code to
  1. Get the axis width (ha.Position), and fontsize (ha.Title.FontSize) in pixels (where ha is the handle to the axis of interest)
  2. If you use fixed width font then it's easy to break the line with something like:
while length(ha.Title.String{end})>YourWidthValue
ha.Title.String{end:end+1}=...
{ha.Title.String{end}(1:YourWidthValue) ;...
ha.Title.String{end}(YourWidthValue:end)};
end
(have not debugged it...)
an even better way is to search backwards for the first space before your YourWidthValue...
Is it not a bit strange that matlab cannot provide this functionallity built in?

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:) why in every years there are lots of updates and MATLAB is old, I think its time to format a title as we want, its not a big deal

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Answer by Micke Malmström on 23 May 2018

ha=gca; NoCharPerLine= 78; % or whatever you want...
if ismatrix(ha(end).Title.String) && size(ha(end).Title.String,2)>NoCharPerLine
II=strfind((ha(end).Title.String(1:NoCharPerLine)),' '); % find last occurence of a space
LastSpaceIndex=II(end);
ha(end).Title.String={ha(end).Title.String(1:LastSpaceIndex-1) ;
ha(end).Title.String(LastSpaceIndex+1:end)};
end
if iscell(ha(end).Title.String)
while size(ha(end).Title.String{end},2)>NoCharPerLine
STR=ha(end).Title.String{end};
II=strfind(STR,' '); % find last occurence of a space
LastSpaceIndex=II(end);
ha(end).Title.String{end}=STR(1:LastSpaceIndex-1);
ha(end).Title.String{end+1}=STR(LastSpaceIndex+1:end);
end
end

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Answer by Hannes
on 15 Aug 2018
Edited by Hannes
on 15 Aug 2018

Thanks Micke, that helped a lot!. Now I try to adapt your code to axes labels, but struggle with that task. Do you have this already available?

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sorry, I dont have that problem with the lables...
What is your problem?
The ylabel/xlabel don't have a title.string option to work with. So, I cannot just apply your code, it would need further re-coding, am I right?

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Answer by Jan
on 15 Aug 2018

This is a job for the textwrap command. Create an uicontrol('Style', 'text') at the wanted position and provide its handle to textwrap.

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Show 1 older comment
You do want to define a width, but not a position? Unfortunately Matlab cannot guess, what you want. Defining a uicontrol object of the style 'text' allows you to let textwrap do exactly, what you want. Therefore I suggest to use this solution instead of hoping for a more generic one. It is only 2 or 3 lines of code. You can even use this uicontrol only to let textwrap do its work, get its output and use it to call ylabel.
I've written a "more generic" solution, which is faster than textrwap. It has 350 lines of code.
Thx for the response. I create a large set of subplots with many scatter plots, which are arranged in a mxn matrix, where m is the amount of input parameters and n is the amount of output parameters. I did not proceed with your approach since I hesitate to guess or somehow automate the calculation of the position for these text objects..
@Hannes Lück: This is a question from 2015. Prefer to open a new thread an explain your question exactly. Provide some example code to demonstrate the problem, then it is much easier to write a solution.

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