pkstatogr

NAME

pkstatogr - program to calculate basic statistics from vector file

SYNOPSIS

pkstatogr -i input [options]

DESCRIPTION

pkstatogr calculates basic statistics on attributes of a vector file. Examples of the basic statistics include: minimum, maximum, median, mean and standard deviation. Histograms (in percentage or absolute values) can also be calculated. The attribute of interest can be selected using the option -n|--fname. Values defined by the -nodata option, or not within the limits set by the options -src_min and -src_max are ignored for the statistics.

OPTIONS

-i filename, --input filename

Input image file(s). If input contains multiple images, a multi-band output is created

-ln layer, --lname layer

Layer name(s) in sample (leave empty to select all)

-n attribute, --fname attribute

Fields on which to calculate statistics

-nodata value, --nodata value

Set nodata value(s)

-src_min value, --src_min value

Set minimum value for histogram

-src_max value, --src_max value

Set maximum value for histogram

-s, --size

Sample size (number of points)

-mm, --minmax

Calculate minimum and maximum value

-min, --min

Calculate minimum value

-max, --max

Calculate maximum value

-mean, --mean

Calculate mean

-median, --median

Calculate median

-stdev, --stdev

Calculate standard deviation

-hist, --hist

Calculate histogram

-nbin value, --nbin value

Number of bins to calculate histogram

-rel, --relative

Use percentiles for histogram to calculate histogram

-kde, --kde

Use Kernel ⟨http://pktools.nongnu.org/html/classKernel.html⟩ density estimation when producing histogram. The standard deviation is estimated based on Silverman’s rule of thumb

-v level, --verbose level

Verbose level

EXAMPLE

report histogram of values in FIELDID (to standard output)

pkstatogr -i input.shp -f FIELDID -n 100

report min, max, mean and standard deviation of values in FIELDID (to standard output)

pkstatogr -i input.shp -f FIELDID -min -max -mean -stdev