[GRASS-dev] wxGUI: i.cluster argument is needed in pair, gui accepts only single value

[Yann Chemin]

Hello,

Below is one of the tests done from the i.cluster wxGUI, where sample
needs a pair as input, while the GUI does not provide such option.

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(Thu Feb  5 13:48:32 2009) Command finished (0 sec)
(Thu Feb  5 13:49:08 2009)
i.cluster group=124r039_20010915 at PERMANENT subgroup=process
signaturefile=signatures.txt classes=15 sample=8 reportfile=report
ERROR: option <sample> must be provided in multiples of 2
       You provided 1 items:
       8
Description:
 Generates spectral signatures for land cover types in an
image using a clustering algorithm.
 The resulting signature file is used as input for i.maxlik,
to generate an unsupervised image classification.
Keywords:
 imagery, classification, signatures
Usage:
 i.cluster group=name subgroup=name signaturefile=name
classes=value
   [seed=name] [sample=row_interval,col_interval]
[iterations=value]
   [convergence=value] [separation=value] [min_size=value]
   [reportfile=name] [--verbose] [--quiet]
Flags:
 --v   Verbose module output
 --q   Quiet module output
Parameters:
          group   Name of input imagery group
       subgroup   Name of input imagery subgroup
  signaturefile   Name for output file containing result
signatures
        classes   Initial number of classes
                  options: 1-255
           seed   Name of file containing initial signatures
         sample   Sampling intervals (by row and col);
default: ~10,000 pixels
     iterations   Maximum number of iterations
                  default: 30
    convergence   Percent convergence
                  options: 0-100
                  default: 98.0
     separation   Cluster separation
                  default: 0.0
       min_size   Minimum number of pixels in a class
                  default: 17
     reportfile   Name for output file containing final
report
(Thu Feb  5 13:49:08 2009) Command finished (0 sec)
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Yann