how to change the XTick of heatmap?

Question

Rt Ro 2019-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/494648-how-to-change-the-xtick-of-heatmap

评论： Ayobami Olanrewaju 2021-2-9

采纳的回答： Adam Danz

在 MATLAB Online 中打开

when I run this code I have 192 months on the x-axis.

I want to show each year (Jan1971,Jan 1972,...Dec 1986) on the x axis. if I do:

set(h,'XTick',datetime('Jan-1971'):calmonths(12):datetime('Dec-1986'));

I have this error:

Error using matlab.graphics.chart.HeatmapChart/set

The name 'XTick' is not an accessible property for an instance of class 'matlab.graphics.chart.HeatmapChart'.

could you please help me to solve the problem.

tbl = readtable('heatmap.test.xlsx');
t1 = datetime(1971,1,1);t2 = datetime(1986,12,1);
t = t1:calmonths(1):t2;t= t(:);
xlabels = string(datestr(t,12));
ylabels = {'A' 'B' 'C' 'D'};
cdata = tbl{:,2:5};
h = heatmap(xlabels,ylabels,cdata');

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Answer 1

Adam Danz 2019-12-3

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编辑：Adam Danz 2019-12-3

在 MATLAB Online 中打开

I'm not sure what rule you were following to chose the x-ticks in your question (Jan1971,Jan 1972,...Dec 1986) but here's how to show every January. You can adapt the rule as needed.

t is your datetime vector

h is the handle to your heatmap object.

% Show every January
idx = month(t)==1;             % index of datetime values to show as x tick
h.XDisplayLabels(~idx) = {''}; % replace rejected tick labels with empties

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Rt Ro 2020-2-13

Thank you for your help.

it works perfectly :).

Ayobami Olanrewaju 2021-2-9

Thank you, the XDisplayLabels and YDisplayLabels works like magic.

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Answer 2

Rt Ro 2020-2-12

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Thank you for your reply.

I did it but it still shows the x-axis values as monthly.

could you please help me?

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Adam Danz 2020-2-12

See updated comment

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Answer 3

Juan Fernández Blasco 2020-4-20

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Any of you did face the problem of rotating the x axis values in a heatmap?

I am trying the following:

h2 = heatmap(tsT,stress_attributes,stress_matrix(:,1:272),'TickAngle',45);

Basically, 'TickAngle',45 because I saw it in a post, but I got this error:

The name 'TickAngle' is not an accessible property for an instance of class 'matlab.graphics.chart.HeatmapChart'.

I also tried without succeeding the following:

h2 = heatmap(tsT,stress_attributes,stress_matrix(:,1:272),[],'TickAngle',45);

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Adam Danz 2020-4-20

编辑：Adam Danz 2020-4-21

Heatmaps are notoriously difficult to customize due to inaccessible graphics handles. A workaround is to remove the tick labels completely, overlay an invisible axes the same size as the heatmap, and add the customizable tick labels to the new axes.

Here's a demo.

If you have any problems applying the demo to your needs show me your attempt and I can help straighten things out.

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