Variable horizontal alignment of cell array's strings in annotation

Question

giannit 2020-4-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/516004-variable-horizontal-alignment-of-cell-array-s-strings-in-annotation

评论： Ameer Hamza 2020-4-29

In the following example, I'm trying to center align the second string of arrcell while keeping the first and third strings aligned to the left

cases = 18;
percent = 0.3;
dim = [0.1 0.5 0.1 0.1];
arrcell = {['there are ',num2str(cases),' cases'],['- - - -'],['the percent is ',num2str(percent)]};
an = annotation('textbox',dim,'String',arrcell,'FitBoxToText','on');
set(an, {'HorizontalAlignment'}, {'left';'center';'left'});

but I get the error

Error using matlab.graphics.shape.TextBox/set
Value cell array handle dimension must match handle vector length.

What is wrong?

This is what I would like to obtain

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Answer 1

Ameer Hamza 2020-4-7

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/516004-variable-horizontal-alignment-of-cell-array-s-strings-in-annotation#answer_424555

编辑：Ameer Hamza 2020-4-7

在 MATLAB Online 中打开

cases = 18;
percent = 0.3;
dim = [0.1 0.5 0.1 0.1];
arrcell = {['there are ',num2str(cases),' cases'],['- - - -'],['the percent is ',num2str(percent)]};
an1 = annotation('textbox',dim,'String',arrcell(3), 'FitBoxToText','on', ...
    'Margin',0, 'EdgeColor', [0 0 0], 'HorizontalAlignment', 'left', ...
    'EdgeColor', 'none');
an1.Position(1:2) = dim(1:2);
drawnow;
pos1 = an1.Position;
an2 = annotation('textbox',[pos1(1) pos1(2)+pos1(4) pos1(3) pos1(4)],'String',arrcell(2), ...
    'Margin',0, 'EdgeColor', [0 0 0], 'HorizontalAlignment', 'center', ...
    'EdgeColor', 'none');
drawnow;
pos2 = an2.Position;
an3 = annotation('textbox',[pos2(1) pos2(2)+pos2(4) pos2(3) pos2(4)],'String',arrcell(1), ...
    'Margin',0, 'EdgeColor', [0 0 0], 'HorizontalAlignment', 'left', ...
    'EdgeColor', 'none');
pos3 = an3.Position;
annotation('rectangle', [pos1([1 2 3]) pos1(4)*3]+[-0.01 -0.01 0.02 0.02]);

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giannit 2020-4-29

Sorry for late, here is my version, is it bad?

Ameer Hamza 2020-4-29

If it works for on your platform, then you should continue using this code. I tried on macOS using R2018b and R2020a, and in both cases, this code created extra space inside the box.

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Answer 2

KALYAN ACHARJYA 2020-4-7

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/516004-variable-horizontal-alignment-of-cell-array-s-strings-in-annotation#answer_424530

编辑：KALYAN ACHARJYA 2020-4-7

在 MATLAB Online 中打开

cases = 18;
percent = 0.3;
dim = [0.1 0.5 0.1 0.1];
arrcell = {['there are ',num2str(cases),' cases'],['- - - -'],['the percent is ',num2str(percent)]};
an = annotation('textbox',dim,'String',arrcell,'FitBoxToText','on');
set(an, {'HorizontalAlignment'}, {'center'});

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giannit 2020-4-7

Thank you! Anyway, this is not exactly what I would like to obtain. Instead I would like

first string left aligned
second string center aligned
third string left aligned

This is why I tried with {'left';'center';'left'}` but, it doesn't work.

Any ideas?

Ameer Hamza 2020-4-7

Unfortunately, such a thing is not supported in MATLAB. The only workaround is to draw each component separately. Check the code in my answer. It is cumbersome, to say the least.

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