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how to change the XTick of heatmap?
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Rt Ro
am 3 Dez. 2019
Kommentiert: Ayobami Olanrewaju
am 9 Feb. 2021
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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Adam Danz
am 3 Dez. 2019
Bearbeitet: Adam Danz
am 3 Dez. 2019
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
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/252483/image.png)
6 Kommentare
Ayobami Olanrewaju
am 9 Feb. 2021
Thank you, the XDisplayLabels and YDisplayLabels works like magic.
Weitere Antworten (2)
Juan Fernández Blasco
am 20 Apr. 2020
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);
1 Kommentar
Adam Danz
am 20 Apr. 2020
Bearbeitet: Adam Danz
am 21 Apr. 2020
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.
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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