Re: [ferret_users] Can we add legend to the plots?

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Hui,
We do need more documentation on this point.  I'll work on that. There 
are a few index entries under "key" which point to some related topics, 
but not to this in particular.

There are several ways to get legends. Ferret automatically creates a 
legend below the plot when you plot several lines in one PLOT command. 
Try this;

  yes? PLOT/i=1:10 i/2, i/4, 1./i

If you add lines to an existing plot with PLOT/OVERLAY, then the legend 
is placed at the lower left. The first plot doesn't have a line in the 
legend, as it is not known when the first PLOT command is issued whether 
it will be part of  a multi-line plot

  yes? plot/i=1:10  i
  yes? plot/over/i=1:10 1 + i/4
  yes? plot/over/i=1:10 1 + 1./i

In addition, several users have contributed scripts to give you more 
control over the legends. You make your plot with PLOT/NOKEY to remove 
the automatic legend, and then call legend.jnl or legline.jnl. The 
go/help command prints out the start of a script so you can see what it 
does.

  yes? go/help legend
  yes? go/help legline
  yes? go/help legline_nu

For the legend.jnl script, there is a demonstration script that makes 
some simple plots and shows how to call it;

  yes? go test_legend.jnl

By the way, one way to search for scripts that might be included with 
Ferret is the Unix command Fgo.  Give the command some text to search 
for in the names of scripts.  The command returns names of scripts that 
match the text.

  > Fgo legend
  legend.jnl
  test_legend.jnl

  > Fgo leg
  legend.jnl
  legline.jnl
  legline_nu.jnl
  test_legend.jnl

Ansley

Hui Du wrote:

> Dear ferret users:
>  I wonder whether we can add  legend to my plots, for instance I want 
> others to know what different colors and shapes mean.
>  Can we do that? I have not found the information about this from the 
> documents.
>  Thanks a lot
>  Hui
>
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