How to plot multiple legends in one plot

Q&A PyGMT Q&A
1

Hello all,
I am a student, new in GMT, I have a plot as shown below and I want to plot the legend but i could only see one legend instead of three. Please, can someone help me.

image
image1199×720 117 KB

gmt begin time series.png
gmt psxy -R1/365/2.200/2.300 -JX12.4i/7.4i ztd_3.dat -W1.15p,Blue, -Bxa30f1+l"days" -Bya0.02f1+l"delay" > t.ps
gmt psxy -R1/365/2.200/2.300 -JX12.4i/7.4i ztd_7.dat -W1.15p,Red, -Bxa30f1+l"days" -Bya0.02f1+l"delay" > t.ps
gmt psxy -R1/365/2.200/2.300 -JX12.4i/7.4i ztd_E.dat -W1.15p,Black, -Bxa30f1+l"days" -Bya0.02f1+l"delay" > t.ps

gmt makecpt -Cpanoply -T-8/8 -H > tt.cpt
gmt set FONT_ANNOT_PRIMARY 12p
gmt legend -R1/365/2.200/2.300 -Jx12.4i/7.4i -Dx0.3i/0.3i+w1.15i+jBL+l1.2 -C0.1i/0.1i -F+p+gwhite+r << EOF>> tsebeje.dat
S 0.1i - 0.3i 187 0.40p 0.4i
#S 0.1i - 0.3i Blue 0.40p 0.4i
#S 0.1i - 0.3i Black 0.40p 0.4i

2
  1. Strange mix of modern and classic mode is no good (if gmt begin is commented out, it is classic, so need -O -K etc.) Stick to modern mode. If you are a new user, especially
  2. plot instead of psxy in modern, and delete all the duplicate -R -J -B arguments after the first
  3. Just add -l"days" to your plot calls and no need for that legend call.
  4. Not sure what tsebeje.dat is for?
  5. Given the comments you only have one point in your legend file.
3

Good day sir, thank you for your prompt response to my request. I effected the changes as suggested but it was not giving me a desired result. Please, see below the code.
gmt plot -R1/365/2.200/2.300 -JX12.4i/7.4i ztd_3.dat -W1.15p,Blue, -Bxa30f1+1-l"days" -Bya0.02f1+l"delay" > t.ps
gmt plot 1/365/2.200/2.300 X12.4i/7.4i ztd_7.dat -W1.15p,Red, xa30f1+1-l"days" ya0.02f1+l"delay" > t.ps
gmt plot 1/365/2.200/2.300 X12.4i/7.4i ztd_E.dat -W1.15p,Black, xa30f1+1-l"days" ya0.02f1+l"delay" > t.ps

4

Presumable no go since you are using “plot” in classic mode. If I try that I get

gmt [ERROR]: Shared GMT module not found: plot

ERROR: No module named plot was found. This could mean one of four cases:

1. There actually is no such module; please check your spelling.
2. You used a modern mode module name while running in GMT classic mode.
3. Module exists in the GMT supplemental library, but the library could not be found.
4. Module exists in a GMT custom library, but none was specified via GMT_CUSTOM_LIBS.

Shared libraries must be in standard system paths or set via environmental parameter DYLD_LIBRARY_PATH.

Also, there are no -O -K handling and you are overwriting your previous t.ps each time Time to look at some examples in the gallery I think to see how to do basic stuff.

5

If you are unable to post a full script or simplification of it and attach data for it then we are unable to be very helpful. As it is this is not a script that can work since there are so many omissions and mistakes in it.