In the graph of Mississippi river annual discharge is it possible to plot each line with a different color (following the legend)? How? [Mississippi] )

I think this would work as long as you do not mind constructing the legend manually (with 6.2.0rc1): gmt begin GMT_cycle_2 gmt plot @mississippi.txt -R0/1/0/50 -JX15c/7c -W2p,auto -Bxaf -Byaf+l"10@+3@+ m@+3@+/s" -BWSrt+t"Mississippi river annual discharge" -i0,1+s1e-3 -wy -g0z0.05+n --COLOR_SET=roy…

I assume -C*cpt* would read a third column (-Z) ?

Yes, it does. But the data file does not have that info. There are two columns plot with the -wa option: gmt plot $Data -W0.25p,red -wa -R0/12/$min/$max -JX20c/13c -Y8c -Bxa1g1+lmonth -Byafg -BWSne Daily discharge rate in m^/s for the Mississippi River, 1930-1940. 1930-01-01T 14527 1930-01-02T 1…

Can you do something like : gmt math -fiT -o1 -T1930-01-01T/1930-01-14T/1 --TIME_UNIT=d --TIME_EPOCH=1930-01-01 T = vector.txt paste -d "," filedata.txt vector.txt > newfiledata.txt (first line create a vector from 0 to N : 1 count per day from 1930-01-01 to 1930-01-14) (second line concatenates…

I didn’t try it yet. But I make some progress using autocolor but I had to manually split the data file in segment for year (i.e. add a > at the end of each year). gmt plot $Data -W0.25p,auto -wa Now, I am searching how automatically split the file.

I usually use awk in loops … Something like (need to be adjusted/tested) for year in 1930..1935; do awk -v var=$year -F[-] '{ if ($1 == var) print $0 }' > $year.txt done ?

BTW, not sure but I don’t think it works because I want to plot lines and (as far as I know) the z-value must be in the header (not in the 3rd column). But it could work for symbols.

A ridiculous idea could be to do it with batch module …

Agree with @maxrjones that you will need to do a manual legend if you want specific language for each colored line. If you add -l you do get one entry per line but they would all say the same thing (whatever label you select).

Thanks. It works. [GMT_cycle_2]

Cyclic data with color

Q&A

Esteban82 April 26, 2021, 11:22pm 12

I must say that I don’t understand why does -g0z0.05+n works.

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Cyclic data with color

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