Extracting time from timestamp

I have a dataset that looks like this (a csv file)

I need to plot temperature of 5 days vs time (in hours)

I seem to be stuck on trying to extract the time in hours from the timestamp. I HAVE TRIED using "hours" but if you observe carefully, if i just use hours, then what happens is that under the hour "14" both entries of "14:00" and "14:30" come, essentially, 2 datavalues for 1 datapoint. This is creating a nightmare graph for me

Any help is greatly appreciated.

x = humidity_site1;
hday1 = x(674:721);
hday2 = x(722:769);
hday3 = x(770:817);
hday4 = x(818:865);
hday5 = x(866:913);
tday1 = hour(y(675:722));
tday2 = hour(y(722:769));
tday3 = hour(y(770:817));
tday4 = hour(y(818:865));
tday5 = hour(y(866:913));
plot(tday1,hday1,tday2,hday2,tday3,hday3,tday4,hday4,tday5,hday5)
legend('Mar 15','Mar 16','Mar 17','Mar 18','Mar 19');
figure
plot(tday1,hday1)

%I imported the data as separate column vectors using the "Import Data"
%tool

Answer 1

[Star Strider]

See my Answer to the essential duplicate of this Extracting time from datetime

With respect to eliminating the connecting lines, sort the data by the x-coordinate. That should elimiinate them.

Meanwhile, as I explained in the post I referenced, I cannot do anything until I have at least an example of that file, and the MATLAB release/version being used to read and plot it (since there have been significant differences over the past decade).

.