Common left ylabel and right ylabel for subplots

Question

Mayank Parmar 2023-6-4

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https://ww2.mathworks.cn/matlabcentral/answers/1978014-common-left-ylabel-and-right-ylabel-for-subplots

评论： Mayank Parmar 2023-6-4

Hello,

I have a figure with 6 subplots in 2 rows and 3 columns. Each subplot has two y axes, first say "Y-1" and second, "Y-2". I want single ylabel on each side for the entire figure. I have following code that takes care of common ylabel on the left hand side:

fig = figure;
subplot(2, 3, 1)
...
subplot(2, 3, 6)
...
handle = axes(fig,'visible','off'); 
handle.XLabel.Visible='on';
handle.YLabel.Visible='on';
xlabel(handle, 'X')
ylabel(handle, 'Y-1')

For right hand common ylabel, I have tried using

yyaxis right

However, that doesn't work for me. Any help on this will be greatly appreciated.

Many thanks!

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Answer 1

Harsh Kumar 2023-6-4

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Hi Mayank ,

It is my understanding that you are unable to assign a common right ylabel for your multi axes graph using yylabel.This might be because there doesn,t exists a function like yylabel as i tried in matlab R2023a .

To resolve this issue, you may use the matlab inbuilt "yyaxis" OR "annotation" function of matlab to get the desired results .

For your reference, the below example demonstrates a simple approach to assign a common right label to a multi-axes graph using "annotation" function :

fig = figure;
% Subplot 1
subplot(2, 3, 1);
% ... code for subplot 1
% Subplot 6
subplot(2, 3, 6);
% ... code for subplot 6
% Create a common ylabel on the right side
annotation('textarrow', [0.91 0.91], [0.45 0.55], 'String', 'Y-1', 'HorizontalAlignment', 'center', 'VerticalAlignment', 'middle', 'Color', 'red', 'FontSize', 12);
% Adjust the figure's position to make room for the ylabel
fig.Position(3) = fig.Position(3) + 0.1;

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Harsh Kumar 2023-6-4

编辑：Harsh Kumar 2023-6-4

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Hi Mayank,

To my understanding , You can do it with 'yyaxis' as well but with a bit adjustment of label coordinates as 'yyaxis' unlike 'annotation' is function related to axis not plot/figure.

For your reference, the below example demonstrates a simple approach to assign a common right label to a multi-axes graph using 'yyaxis' function:

fig = figure;
% Subplot 1
subplot(2, 3, 1);
% ... code for subplot 1
% Subplot 6
subplot(2, 3, 6);
% ... code for subplot 6
% Set the right-hand y-axis label
yyaxis right;
ylabel('Y-1');
% Adjust the position and height of the right-hand y-axis label
h = get(gca, 'ylabel');
h.Position(1) = h.Position(1) + 0.1;  % Adjust the x-coordinate as needed
h.Position(2) = h.Position(2) + 0.9;  % Adjust the y-coordinate as needed

Mayank Parmar 2023-6-4

Hi Harsh,

I tried similar approach previously but in this case, 'ylabel' on the left hand side disappears. For now, I will stick with the annotations and fiddle with this problem when I have more time. I am not closing this question yet as I would like to come back to it with or for a solution that uses 'ylabel' to get labels on both sides.

Thank you for your patience!

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