Reversing y axis direction causes xticks to invert and overlap with labels

Question

Kelly Hokanson 2018-11-21

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/431242-reversing-y-axis-direction-causes-xticks-to-invert-and-overlap-with-labels

回答： Robert Weigel 2021-5-13

I just switched from 2015a to 2018b and encounted a problem with the xticks and corresponding labels whenever I invert the y-axis. The Xtick direction seems reversed from the set value (in or out) and they overlap with the labels. I have no clue how to fix this.

Thanks!

subplot(1,3,1)
plot(rand(10,1),rand(10,1).*(1E-8))
subplot(1,3,2)
plot(rand(10,1),rand(10,1).*(1E-8))
set(gca,'Ydir','reverse')
subplot(1,3,3)
plot(rand(10,1),rand(10,1).*(1E-8))
set(gca,'Ydir','reverse')
set(gca,'TickDir','out')

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Star Strider 2018-11-21

My pleasure!

Consider posting the MathWorks reply in a Comment here.

Kelly Hokanson 2018-11-21

编辑：Kelly Hokanson 2018-11-21

From the support team:

"I have been investigating the issue for a while now and unfortunately have not been able to come up with a workaround yet. I believe the issue is caused due to the presence of the exponent in the yaxis. The code snippet you provided on the MATLAB Answers page works as expected when (1E-8) exponent is not present.

If the exponent value of the y data is known previously, perhaps we could plot the y data without the exponent and specify the exponent in the ylabel. The following example shows how we may be able to achieve this.

>> f=figure;

>> x=1:10; y=rand(10, 1)*(1E-8);

>> Exp = max(floor(log10(y)));

>> plot(x, y*(10^-Exp));

>> ylabel(strcat(' x 10e', num2str(Exp)))

>> set(gca, 'Ydir', 'reverse')

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Answer 1

Samuel Coakley 2019-5-31

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/431242-reversing-y-axis-direction-causes-xticks-to-invert-and-overlap-with-labels#answer_377381

编辑：Samuel Coakley 2019-5-31

在 MATLAB Online 中打开

So I ran into the same problem and my solution is below.

Say you are plotting some data in A. Instead of plotting just A, plot -A and change the y tick labels. This means you don't have to reverse the axis so the x tick labels are still in the right place.

plot(1:length(A), -A)
yt = get(gca,'YTickLabel');
for ii=1:length(yt)
    ytt{ii} = yt{ii}(2:end); % This trims the minus sign from the negative numbers
end
set(gca, 'YTickLabel', ytt)

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Kelly Hokanson 2019-6-4

This has been addressed in the newest release

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Answer 2

Stefanie Schwarz 2021-3-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/431242-reversing-y-axis-direction-causes-xticks-to-invert-and-overlap-with-labels#answer_654942

编辑：Stefanie Schwarz 2021-3-22

在 MATLAB Online 中打开

This is a bug in R2018b that was fixed in R2019a. See the following Bug Report:

https://www.mathworks.com/support/bugreports/1832634

A workaround is to set the Y-axis label to text and insert spaces.

Example:

>> set(gca, 'YTickLabel', {'0 ', '1 ', '2 ', '3 ', '4 '})

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Answer 3

Robert Weigel 2021-5-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/431242-reversing-y-axis-direction-causes-xticks-to-invert-and-overlap-with-labels#answer_699008

在 MATLAB Online 中打开

Adding an empty subscript worked for the case when the x-tick labels have exponents.

    xtl = get(gca,'XTickLabel'); % {'10^{1}', '10^{2}'}
    for i = 1:length(xtl)
        xtl{i} = [xtl{i},'_{ }']; % Append empty subscript
    end
    set(gca,'XTickLabel',xtl);