How to plot a specific period of data

Hi. I am a student. I am trying to plot a graph which will show only a month out of a year data.

What I have: daily data from 01.01.19 to 31.12.2019 data_year(8760x1) and relative time step t(8760x1) -converted from dates and times.

I want to show a graph for September only.

How to do it?

What I did:

startDate = datenum('01-Sep-2019','dd-mmm-yyyy');

endDate = datenum('30-Sep-2019', 'dd-mmm-yyyy');

tma=datenum([2019 9 1 0 0 0]) + [0:1/24:30]

tt = (tma>=startDate & tma<=endDate);

figure

plot(tma(tt),data_year(tt))

datetick('x','dd mmm yyyy','KeepTicks');

set(gca,'XTickLabelRotation',30);

It works but I do not think it is correct.

Thank you in advance

[Mathieu NOE]

isbetween

Determine elements within date and time interval

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Syntax

tf = isbetween(t,tlower,tupper)

Description

example

tf = isbetween(t,tlower,tupper) returns an array containing logical 1 (true) where the corresponding element of t is a datetime or duration value that lies within the closed interval specified by the corresponding elements of tlower and tupper. The output tf indicates which elements of t satisfy:

tlower <= t <= tupper

The sizes of t, tlower, and tupper must be the same or be compatible. If the sizes of the input arrays are compatible, then the arrays implicitly expand to match each other. For example, if one of t, tlower, or tupper is a scalar, then the scalar is compared to each element of the other arrays. Also, vectors with different orientations (row vectors and column vectors) implicitly expand to form a matrix.