RE: [ferret_users] Error on go error

RE: [ferret_users] Error on go error_bars

To: Paulo Santiago <paulohsm@xxxxxxxxx>, "ferret_users@xxxxxxxx" <ferret_users@xxxxxxxx>

Subject: RE: [ferret_users] Error on go error_bars

From: "Kaduk, Jorg D. (Dr.)" <jk61@xxxxxxxxxxxxxxx>

Date: Sun, 15 Nov 2015 20:24:50 +0000

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Thread-topic: [ferret_users] Error on go error_bars

Hello Paulo,

could the issue described in the link below apply to your problem?

'hope it helps,

best wishes,

Joerg

http://www.pmel.noaa.gov/maillists/tmap/ferret_users/fu_2002/msg00004.html

From: owner-ferret_users@xxxxxxxx [owner-ferret_users@xxxxxxxx] on behalf of Paulo Santiago [paulohsm@xxxxxxxxx]
Sent: 15 November 2015 15:20
To: ferret_users@xxxxxxxx
Subject: [ferret_users] Error on go error_bars

Dear Ferreters,

I would like to plot a variable and it's error as a filled polygon.

Based on "error_bars_demo.jnl" I'm running the following commands:

use coads_climatology
let mean = airt[x=60W:10E, y=0, l=@ave]
let stdv = airt[x=60W:10E, y=0, l=@var]^0.5
plot/vlimits=23:30 mean
go plot_swath poly/over/pal=gray/nolab mean-stdv, mean+stdv

When I call the plot_swath script, Ferret returns the following error message:

**ERROR: error: data is not a line

The same happens when I try "go error_bars".

"error_bars_demo.jnl" plots ok, and I can't see what I'm doing wrong in comparison to this demo script.

Could someone please help me?

Paulo Santiago

Doutorado em Meteorologia

Programa de Pós-Graduação em Meteorologia

Instituto Nacional de Pesquisas Espaciais

Tel.: (12) 3186 8637