How to concentrate time variables in separated columns for time series plot?

I'm new to Matlab, and I'm now working on a time series plot using a file whose hh:mm:ss are in 3 different columns.

How do I do to combine them to a single column? Or is it necessary to do so?

It would also be nice if there are some other ways that could show the time on x-axis.

Answer 1

[Abhishek Singh]

Let’s break it down the problem into 2 parts:

1). Loading the data from file

Assuming the table is in this format, named as ‘time_file.txt’.

You can load it into a matrix using:

timeseries_data = importdata('time_file.txt',',') % here ‘,’ being the delimiter

2). Converting it into datetime array

timearray = datetime(timeseries_data) %this is the datetime array that is being required 

Remember that the datetime function takes arguments as (year, month, date).

If your matrix has columns in form (date, month, year), then overcome this using:

flipped_matrix  = fliplr(timeseries_data) % this flips the matrix from left column to right

Now use timearray in plot function as x-axis.