Plotting graph with X axis as time axis and Y axis showing kilometeres

I have txt file in formated like this:
11:10 123
11:11 125
11:12 127
11:13 129
in which first column contains time (hh:mm) and second column contains width in kilometers.
How can I plot it so my X axis will show time in hh:mm format and not in degrees and minute (ex. 11°30’E).

Really sorry for my bad english

Hi, @pwr-student125

Try to use Date/Time format in -R option to make GMT understand your first column is time. Like this