## Topic: statistics

d.correlate | Prints a graph of the correlation between raster maps (in pairs).
db.univar | Calculates univariate statistics on selected table column.
i.cca | Canonical components analysis (CCA) program for image processing.
r.clump | Recategorizes data in a raster map by grouping cells that form physically discrete areas into unique categories.
r.coin | Tabulates the mutual occurrence (coincidence) of categories for two raster map layers.
r.covar | Outputs a covariance/correlation matrix for user-specified raster map layer(s).
r.cross | Creates a cross product of the category values from multiple raster map layers.
r.kappa | Calculates error matrix and kappa parameter for accuracy assessment of classification result.
r.mode | Finds the mode of values in a cover map within areas assigned the same category value in a user-specified base map.
r.object.geometry | Calculates geometry parameters for raster objects.
r.quant | Produces the quantization file for a floating-point map.
r.reclass.area | Reclasses a raster map greater or less than user specified area size (in hectares).
r.regression.line | Calculates linear regression from two raster maps: y = a + b*x.
r.regression.multi | Calculates multiple linear regression from raster maps.
r.report | Reports statistics for raster maps.
r.statistics | Calculates category or object oriented statistics.
r.stats | Generates area statistics for raster map.
r.stats.quantile | Compute category quantiles using two passes.
r.stats.zonal | Calculates category or object oriented statistics (accumulator-based statistics).
r.support.stats | Update raster map statistics
r.univar | Calculates univariate statistics from the non-null cells of a raster map.
r3.stats | Generates volume statistics for 3D raster maps.
r3.univar | Calculates univariate statistics from the non-null cells of a 3D raster map.
t.rast.univar | Calculates univariate statistics from the non-null cells for each registered raster map of a space time raster dataset.
t.rast3d.univar | Calculates univariate statistics from the non-null cells for each registered 3D raster map of a space time 3D raster dataset.
t.vect.univar | Calculates univariate statistics of attributes for each registered vector map of a space time vector dataset
v.db.univar | Calculates univariate statistics on selected table column for a GRASS vector map.
v.kcv | Randomly partition points into test/train sets.
v.normal | Tests for normality for vector points.
v.outlier | Removes outliers from vector point data.
v.qcount | Indices for quadrat counts of vector point lists.
v.rast.stats | Calculates univariate statistics from a raster map based on a vector map and uploads statistics to new attribute columns.
v.univar | Calculates univariate statistics of vector map features.

See also the corresponding keyword statistics for additional references.

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