Changing the number of xticks on heatmat (without changing the data)

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Camille Woicekowski
评论： Camille Woicekowski 2020-6-25
I am creating a heat map where the x-axis is a datetime when a measurement was taken. I have about 100 times when data was recorded. When all 100 ticks show up on the x-axis, its not legible so I want to only display time labels for every 10th measurement. I have tried using
ax = gca;
ax.XDisplayLabels = [date(1:10:end)];
But I get the error message "'XDisplayLabels' vector must contain the same number of elements as the 'XDisplayData vector'".
How do I map all 100 columns of data but only display every 10th xtick label?

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回答（1 个）

Sindar
Sindar 2020-6-25
Try:
xt=xticks;
xticks(xt(1:10:end))
If that doesn't work, it sounds like
ax = gca;
ax.XDisplayData = [date(1:10:end)];
% probably not necessary
ax.XDisplayLabels = [date(1:10:end)];
is the version of your solution that will work.
p.s. be warned that "date" is an existing function
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Sindar
Sindar 2020-6-25
It's not looking good. The properties I'd change just don't seem to exist for heatmap objects
Camille Woicekowski
Camille Woicekowski 2020-6-25
Yeah, same. These properties don't seem to exist for heatmap, which is frustrating. Thanks for your help though

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