Color background between two ylines patch (datetime)

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Lieke Numan 2019-3-15

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评论： Star Strider 2019-3-18

I have a plot with heartrate over time, using a datetime function. In addition I have two ylines (y=60 and y=100). Now I want to color the area (background) between those y-lines, for my whole timeline using datetime. The function patch does not work, as it cannot deal with datetime functions. How can I do this?

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Geoff Hayes 2019-3-15

Lieke - can you provide a screen shot of what you have and what you want coloured in? I don't understand how the datetime function is an issue since you just want to color the area between those y-lines. Aren't the y-lines just y=60 and y=100?

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Star Strider 2019-3-15

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The error is:

Error using patch
Non-numeric data is not supported in 'patch'

So you can’t use it with datetime objects.

If you want a single vertical line, just use plot:

datetime1=datetime('18-Aug-2017 22:56:00');
datetime2=datetime('18-Aug-2017 23:56:00');
figure
plot([datetime1 datetime1],[50 100],'red')
ylim([40 150])
set(gca, 'XTickLabelRotation',45)