[GRASS-user] "Illegal value(s) of sample intervals" using i.cluster

[Gökçen Güner]

Hi,
I'm using WinGRASS-6.5.svn-r54428-453 on Win7. I want to use i.cluster with
2 bands. Metadata of one of them is here:

r.info map=band4_2005 at PERMANENT

 +----------------------------------------------------------------------------+
 | Layer:    band4_2005 at PERMANENT           Date: Tue Jan 01 18:30:17
2013    |
 | Mapset:   PERMANENT                      Login of Creator:
murat           |
 | Location:
newLocation                                                      |
 | DataBase:
D:\gis\grassWS                                                   |
 | Title:     ( band4_2005
)                                                  |
 | Timestamp:
none                                                            |
 |----------------------------------------------------------------------------|
 |
|
 |   Type of Map:  raster               Number of Categories:
255             |
 |   Data Type:
CELL                                                       |
 |   Rows:
7121                                                       |
 |   Columns:
8081                                                       |
 |   Total Cells:
57544801                                                   |
 |        Projection: UTM (zone
36)                                           |
 |            N:    4257015    S:    4043385   Res:
30                     |
 |            E:     844215    W:     601785   Res:
30                     |
 |   Range of data:    min = 0  max =
255                                     |
 |
|
 |   Data
Description:                                                        |
 |    generated by
r.in.gdal                                                  |
 |
|
 |
Comments:                                                                |
 |    r.in.gdal
input="C:\Users\murat\Dropbox\projedata\qgisWS\grassData\e\   |
 |    tm\L71175034_03420050627_B40.TIF"
output="band4_2005"                   |
 |
|
 +----------------------------------------------------------------------------+
(Tue Jan 01 18:44:02 2013) Command finished (0
sec)

The error of i.cluster with different parameters:

i.cluster group=group2000 at PERMANENT subgroup=group2000
sigfile=unsupervised_signature classes=16 sample=4,5 separation=0.5
reportfile=D:\gis\grassData\etm\unsupervised_signature
ERROR: Illegal value(s) of sample intervals (4,5)
i.cluster group=group2000 at PERMANENT subgroup=group2000
sigfile=unsupervised_signature classes=16 sample=4,5
reportfile=D:\gis\grassData\etm\unsupervised_signature
ERROR: Illegal value(s) of sample intervals (4,5)
i.cluster group=group2000 at PERMANENT subgroup=group2000
sigfile=unsupervised_signature classes=16 sample=1000, 1000
reportfile=D:\gis\grassData\etm\unsupervised_signature
ERROR: Illegal value(s) of sample intervals (1000, 1000)
i.cluster group=group2000 at PERMANENT subgroup=group2000
sigfile=unsupervised_signature classes=16 sample=81,71
reportfile=D:\gis\grassData\etm\unsupervised_signature
ERROR: Illegal value(s) of sample intervals (81,71)

What should I do?

Thanks in advance.
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