Hi -
What you're trying will work, you just need need to give two lists, with
the xpoints and ypoints, with a comma between, and just let them be
simple values that express the locations in the units of the coordinates
of the grid you're using (here, in degrees west, and degrees north.)
yes? set data levitus_climatology
yes? shade temp[k=1]
yes? plot/vs/line/over/color=black/nolabel {110,10}, {10,40}
The plot as it's presented by default breaks at 20 west, so it might be
better to locate it differently in X to begin with
yes? set data levitus_climatology
yes? shade/x=0:360 temp[k=1]
yes? plot/vs/line/over/color=black/nolabel {110,10}, {10,40}
! and you can plot any number of locations this way, e.g.
yes? plot/vs/line/over/color=purple/nolabel {110,210,215}, {20,30,-30}
The plot as it's presented by default breaks at 20 west, so it might be
better
and, while the ALINE command mentioned in the last message does work,
but it doesn't work well on plots involving time. Just a couple of
resources here for that,
http://ferret.pmel.noaa.gov/FERRET_17sep07/FAQ/custom_plots/time_series_symbol_overlay.html
http://ferret.pmel.noaa.gov/FERRET_17sep07/FAQ/custom_plots/time_series_overlay.html
Arne Biastoch wrote:
Hi Ferreters,
just a quick and (I assume) simple question that struggles me.
Suppose I have a x-y-plot, e.g.
yes? set data levitus_climatology
yes? shade temp[k=1]
How can I draw a single line, e.g. from 10N/110W to 40N/10W?
I tried:
yes? plot/vs/line/over/color=black/nolabel {110W,10N}{10W,40N}
**ERROR: command syntax: {110W,10N}{10W,40N}
{110W,10N} before {10W,40N} is illegal
but always get an error.
Thanks,
Arne