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Re: [ferret_users] Adding reference lines


Nearly right, you also need to specify the /LINE qualifier. I'd also use the symbols $YAXIS_MAX and $YAXIS_MIN to get the upper and lower limits of the frame automatically.

plot/ov/col=3/nolab/vs/line {32,32},{($yaxis_min),($yaxis_max)}

If you remap your data to the appropriate latitude grid this sort of thing can be done automatically with the PLOT/GRAT, PLOT/HGRAT and PLOT/VGRAT commands. (Aside to the documentation maintainers /GRAT and friends are mentioned in documentation for PLOT but they aren't listed in the summary of qualifiers at the top of the page.)



On 25/05/15 12:30, Nicolas Freychet wrote:

I am not sure I understand what you want to do. But if you just want to add a line on your plot, you should use the function "plot/vs/..." such as:

plot/vs/over {32,32},{0,28}

This should add a line on your plot at x=32, and between y=0 and y=28.


2015-05-25 9:48 GMT+08:00 Pearse Buchanan <Pearse.Buchanan@xxxxxxxxxxx>:

Hello dear Ferret community,


I have been trying to add some reference lines to my plots and have come up against a wall.


I have some plots of SST as a function of Latitude (90°S to 90°N, which is grid cells 0:112, see below) and would like to add a reference line at 40°S (grid cell 32) and 40°N (grid cell 81). However, after looking through the ferret manuals I haven’t been able to find any information about adding reference lines.


I hope I am not annoying anyone with this simple problem.


Something like this!


Pearse J. Buchanan

PhD Candidate / CSIRO-UTAS Quantitative Marine Science

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania




~~~ “Ocean deoxygenation: A Palaeo-Modelling Perspective” ~~~

Parts of the Ocean are predicted to lose oxygen in the coming century. But why?

Looking into the past, how does oxygen in the ocean change across climate transitions?


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Nicolas Freychet
Postdoc Reseach Fellow at RCEC
Academia Sinica

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