Make an Histogram with 24 bars

I have a variable of duration and I want to get an histogram where each bar (24 in total, for each hour) contains the total messages recieved at the same hour

Answer 1

[Cris LaPierre]

Check out the documentation for histogram. You likely want to use one of these syntaxes.

• histogram(X,nbins)
• histogram(X,edges)

Answer 2

[Steven Lord]

The histogram function can operate on datetime and duration arrays. Here's an example using datetime; you should be able to adapt it to operate on a duration array.

midnight = datetime('today');
secondsPerDay = seconds(days(1));
s = seconds(randi(secondsPerDay, 1000, 1));
T = midnight + s;
T(1:10) % Show the first few elements of T to show they contain date and time information

ans = 10×1 datetime array
   19-Oct-2021 23:42:45
   19-Oct-2021 21:59:22
   19-Oct-2021 16:31:34
   19-Oct-2021 14:18:30
   19-Oct-2021 18:25:32
   19-Oct-2021 10:08:10
   19-Oct-2021 02:45:47
   19-Oct-2021 17:54:04
   19-Oct-2021 11:18:35
   19-Oct-2021 10:02:54

histogram(T, midnight + hours(0:24)) % 1 hour long bins