[GRASS-dev] Re: [GRASS GIS] #1279: i.pca metadata truncated

[GRASS GIS]

#1279: i.pca metadata truncated
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 Reporter:  Barney2011             |       Owner:  grass-dev@…              
     Type:  defect                 |      Status:  new                      
 Priority:  normal                 |   Milestone:  6.4.1                    
Component:  Default                |     Version:  6.4.0                    
 Keywords:  i.pca metadata r.info  |    Platform:  Linux                    
      Cpu:  x86-64                 |  
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Comment(by hamish):

 so it is getting chopped at char 80.
 by my calculations 14 bands would need ~140 characters.

 maps written by grass 7's i.pca should be ok as they don't have the 80x40
 limit. although instead of allocating 256 chars for i.pca/support.c's
 tmpeigen[] we might allocate (bands * 8) + 30 instead. (or perhaps just
 1024 and push the problem away a few years)


 as for a fix in GRASS 6, I think we need to insert a "\n" then 15 spaces
 after each 6th band is
 printed (if there's more to come). so it would look like:
 {{{
 PC14     67.08 ( 0.0188, 0.0040,-0.0002, 0.0096, 0.0023,-0.0056,
                  0.0126,-0.0173,-0.0002, 0.0096, 0.0023,-0.0056,
                  0.0126,-0.0173 ) [ 88.07% ]
 }}}

 but in the case of 14 bands it would then make the history file 50 lines
 long, and so more than the max 40 lines long, at which the command history
 would be truncated.


 Hamish

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Ticket URL: <https://trac.osgeo.org/grass/ticket/1279#comment:3>
GRASS GIS <http://grass.osgeo.org>