How to plot line in time series format?

Q&A
1

Hi, I have tide gauge data. I want to plot it in time series format (DD:HH:MM). I have already tried it but got an error. Can anyone help me?
Here is my code and my data

gmt begin tidegauge png
gmt basemap -JX7.0c/3.0c -R17:19:46/18:03:00/-0.4/0.4 -Ba
psxy time.dat -W1,green --FORMAT_DATE_IN=dd:hh:mm
gmt end showtime.dat (522.5 KB)

2

Hi!! What error did you get?

3

gmt is missing here. should be
gmt psxy time.dat -W1,green --FORMAT_DATE_IN=dd:hh:mm

UPD time.dat contains multiple values per each dd:hh:mm value. You should add seconds or use only one value per each minute. One measurement per minute should be good enough resolution for tide gauge data.
17:19:46 0.0308012
17:19:46 0.0308012
17:19:46 0.0308012
17:19:46 0.0308012
17:19:46 0.0308012
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018
17:19:46 0.0408018

4

There is no thing such as dd:hh:mm - that is a made-up format that mixes days and clocks. You would have to turn that into something sensible, see ISO8601 for conventions.