Creating Histogram using .mat file

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Sclay748
Sclay748 2020-8-18
评论： Sclay748 2020-8-18
Hello,
I am trying to create a histogram. I used a .mat file to create a 1x5000 structure. I am trying to plot only 1000 out of the 5000, so I call 'a' and set the length to 1000 in a for loop, but it says it is only plotting one data point instead of them all. Any idea what I am doing wrong? Thanks!
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Stephen23
Stephen23 2020-8-18
1000 is a scalar number, so length(1000) is one, so your loop will iterate exactly once.
Sclay748
Sclay748 2020-8-18
ahh I thought if I changed x from a(i).time; to a(1).time; then that would be scalar and only print time once at the first row. Thought I was safe putting it in the length.
How would I fix this so it isn't scalar and includes all 1000 points?

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Cris LaPierre
Cris LaPierre 2020-8-18
I suspect your don't really want to create 1000 histograms. You don't need a for loop.
Try
histogram([a(1:1000).time])
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Cris LaPierre
Cris LaPierre 2020-8-18
I think you'd have to do it like this:
histogram([a(1:1000).time]/1e3)

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