How to plot a cell array containing characters?
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Hi everyone.
I have a cell array (1x1000) that looks like this:
comment=[artefact artefact 0 0 0 0 ...] ;
How can I plot the strings of this array against other values already plotted as lines?
3 Comments
Jan
on 15 Apr 2022
comment=[artefact artefact 0 0 0 0 ...] ;
This is not a cell array. Please post some code, which really procudes the variables you are talking of.
I have no idea, how you want to "plot" a string or CHAR vector.
Mariagrazia Ambrosino
on 15 Apr 2022
Edited: Mariagrazia Ambrosino
on 15 Apr 2022
I got this result as an export from c ++. it is stored as a 1x1000 cell and inside there are two strings. I should add these 2 strings to an already existing plot.
it is a very difficult subject for me, I hope I have explained myself.
I have to add the 'artefact' strings on the red lines:
Image Analyst
on 19 Apr 2022
Again, attach your cell array with the paperclip icon
save('Answers.mat', 'comment');
after you read this link:
Answers (1)
% you have a 1x1000 cell array called 'comment':
comment = repmat({0},1,1000);
comment([1 2]) = {"artefact"};
disp(comment);
% and you have already plotted the lines:
figure
xlim([0 5]*1e6);
ylim([-4000 4000]);
hold on
plot([0 0 NaN 1.3 1.3 NaN 4.52 4.52 NaN]*1e6,[-4000 4000 NaN -4000 4000 NaN -4000 4000 NaN],'--r');
% here's how you can make the texts:
text(0,0,comment{1});
text(1.3e6,0,comment{2},'Rotation',90)
text(4.52e6,0,comment{2},'Rotation',-45);
4 Comments
Mariagrazia Ambrosino
on 19 Apr 2022
You can use isstring or ischar to determine whether something is a string or a character array, respectively.
% some comments:
words = split('now is the winter of our discontent');
% put them into a cell array at random indices:
idx = cumsum(randi(5,1,numel(words)));
comment = repmat({0},1,idx(end));
comment(idx) = words
% make text objects showing the comments (use ischar to determine whether
% a particular cell of cell array 'comment' contains a comment)
for ii = 1:numel(comment)
if ischar(comment{ii})
text(ii,ii,comment{ii});
end
end
grid on
xlim([0 ii+1]);
ylim([0 ii+1]);
Mariagrazia Ambrosino
on 20 Apr 2022
Voss
on 20 Apr 2022
You're welcome! If you have any other questions, let me know. Otherwise, if my answer satisfactorily addresses what you're trying to do, please click 'Accept this Answer'. Thanks!
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on 15 Apr 2022
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