How to read hh:mm:ss.sss time format from a file that has time and other data

Basically I am working with generated ECG data.

The data is stoed as follows in the file as points

00:00:00.000 -0.060

00:00:00.010 -0.065

00:00:00.020 -0.060

00:00:00.030 -0.075

00:00:00.040 -0.065

00:00:00.050 -0.070

00:00:00.060 -0.070

and so on.

when I load the data from the file Matlab interpets it as this:

0 -0.0600000000000000

0 -0.0650000000000000

0 -0.0600000000000000

0 -0.0750000000000000

0 -0.0650000000000000

0 -0.0700000000000000

0 -0.0700000000000000

0 -0.0900000000000000

how do I fix this, i need the time format to be changed to seconds

Answer 1

[Stephen23]

Because you did not upload a sample file I had to create my own (attached).

T = readtable('test.txt')

T = 7×2 table
        Var1         Var2 
    ____________    ______

    00:00:00.000     -0.06
    00:00:00.010    -0.065
    00:00:00.020     -0.06
    00:00:00.030    -0.075
    00:00:00.040    -0.065
    00:00:00.050     -0.07
    00:00:00.060     -0.07

T.Var1

ans = 7×1 duration array
   00:00:00.000
   00:00:00.010
   00:00:00.020
   00:00:00.030
   00:00:00.040
   00:00:00.050
   00:00:00.060