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Improved plotting of DOUBLE data
- Subject: Improved plotting of DOUBLE data
- From: Liam Gumley <Liam.Gumley(at)ssec.wisc.edu>
- Date: Tue, 15 Jun 1999 14:09:38 -0500
- Newsgroups: comp.lang.idl-pvwave
- Organization: Space Science and Engineering Center, University of Wisconsin-Madison
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:15211
There was a discussion here recently about the limitations of PLOT
because it converts it's arguments to single precision. I just stumbled
across the following interesting routines at the PV-WAVE website, which
seem to work fine under IDL5:
ftp://ftp.boulder.vni.com/pub/unsupported/wave_user/release/plot_dbl.pro
ftp://ftp.boulder.vni.com/pub/unsupported/wave_user/release/oplot_dbl.pro
For example, to show the limitations of PLOT in IDL5:
x = dindgen(10)
y = x*0.0001d + 1000d
plot, x, y, /ynozero, ytickformat='(f10.4)'
oplot, x, y + 0.0001d
Now try PLOT_DBL (which normalizes the data):
plot_dbl, x, y, /ynozero, ytickformat='(f10.4)'
oplot_dbl, x, y + 0.0001d
It seems to work reasonably well in the few examples I've tried.
Cheers,
Liam.
--
Liam E. Gumley
Space Science and Engineering Center, UW-Madison
http://cimss.ssec.wisc.edu/~gumley