Quiet. Turn off informational messages.
Parameters:
- input=name
- Name of an existing sites file.
- output=name
- Name of the output sites file. If not specified, the
program writes to standard output.
- field=value
- Decimal attribute to use for calculation
default: 1
- min=value
- Set a minimum sample size per cell. If there are fewer than
value sites found for a given cell, statistics are not calculated for
that cell.
default: 1
- stats=stat[,stat,...]
- Specify which statistics should be reported. Statistics
will be reported in the order specified, otherwise
they are output in the order below. The statistics are:
m - mean
s - standard deviation
cv - coefficient of variation
skw - skewness
kur - kurtosis
mse - mean of squares
mav - mean of absolute values
min - minimum
q1 - first quartile
med - median
q3 - third quartile
max - maximum
sum - sum
n - number of sites in the sample
SEE ALSO
s.univar,
s.windavg,
s.normal,
r.univar
NOTES
Requires at least 16 bytes of memory per input site plus some other overhead.
Very large input sites files may cause excessive swap file usage or
cause the program to fail with an out of memory error.
Certain statistics are invalid when calculated for a single site. These
statistics are the standard deviation, coefficient of variation, skewness and
kurtosis. The min parameter may be used to insure the sample size
is large enough to approximate normality. Additionally, the cell size for the
current region may be enlarged to capture more sites per cell. No test for
normality is performed on the input and some statistics may not be valid
if normality is violated.
BUGS
None known.
Please send all bug fixes and comments to the grass development team.
http://grass.itc.it.
AUTHOR
Eric G. Miller, adapted from s.univar written by
James Darrell McCauley
<darrell@mccauley-usa.com>,
when he was at
Agricultural
Engineering,
Purdue University
Last changed: $Date: 2003/08/20 14:14:48 $