[GRASS-user] i.PCA r.info output format
rabennett at ymail.com
Fri Feb 11 04:18:12 EST 2011
Thanks Hamish. I am not lucky this time, the information in this file is also
I have tried to create a bug report but failed as I am not a recognised user?
From: Hamish <hamish_b at yahoo.com>
To: GRASS user list <grass-user at lists.osgeo.org>; Rebecca Bennett
<rabennett at ymail.com>
Sent: Thu, 10 February, 2011 22:31:08
Subject: Re: [GRASS-user] i.PCA r.info output format
> I have undertaken a number of transformations of spectral
> data using the i.pca in both GRASS 6.4 and GRASS 7.
> Unfortunately when more than 6 bands are used r.info cannot
> display the eigen vectors and % importance
> Output for r.info should look like this:
> PC1 1170.12 ( -0.63 -0.65 -0.43 ) [ 88.07% ]
> PC2 152.49 ( 0.23 0.37 -0.90 ) [ 11.48% ]
> But instead looks like this:
> PC1 13770134.87 ( 0.1019, 0.5087, 0.1896, 0.5185, 0.4578, 0.4527, 0.107
> 6PC2 174134.96 ( 0.6530,-0.1228,-0.0673,-0.1493,-0.0026, 0.0203, 0.7289
> with the full metadata being truncated.
> As I know the values are being calculated as they display
> in the i.pca output upon completion, so this appears to be a
> size issue with the display of r.info?
GRASS 6's metadata system has a historical wart which limits
the history file's column width to 80 characters and 40 lines.
> Is there any way to access the full metadata for the rasters
> without recalculating them?
If you're lucky, the data will be in the $MAPSET/hist/$MAPNAME
file and r.info is just failing to pass it on.
If it's not, please let us know/file a bug report.
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