1t.rast.univar(1)            GRASS GIS User's Manual           t.rast.univar(1)
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NAME

6       t.rast.univar   -  Calculates  univariate  statistics from the non-null
7       cells for each registered raster map of a space time raster dataset.
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KEYWORDS

10       temporal, statistics, raster, time
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SYNOPSIS

13       t.rast.univar
14       t.rast.univar --help
15       t.rast.univar  [-eru]  input=name   [output=name]     [where=sql_query]
16       [separator=character]   [--overwrite]  [--help]  [--verbose]  [--quiet]
17       [--ui]
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19   Flags:
20       -e
21           Calculate extended statistics
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23       -r
24           Ignore the current region settings and use the raster  map  regions
25           for univar statistical calculation
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27       -u
28           Suppress printing of column names
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30       --overwrite
31           Allow output files to overwrite existing files
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33       --help
34           Print usage summary
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36       --verbose
37           Verbose module output
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39       --quiet
40           Quiet module output
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42       --ui
43           Force launching GUI dialog
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45   Parameters:
46       input=name [required]
47           Name of the input space time raster dataset
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49       output=name
50           Name for output file
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52       where=sql_query
53           WHERE  conditions  of SQL statement without ’where’ keyword used in
54           the temporal GIS framework
55           Example: start_time > ’2001-01-01 12:30:00’
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57       separator=character
58           Field separator character between the output columns
59           Special characters: pipe, comma, space, tab, newline
60           Default: pipe
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DESCRIPTION

63       t.rast.univar calculates univariate statistics from the non-null  cells
64       for each registered raster map of a space time raster dataset.
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66       By  default  it  returns the name of the map, the start and end date of
67       dataset and the following  values:  mean,  minimum  and  maximum  vale,
68       mean_of_abs,  standard  deviation,  variance, coeff_var, number of null
69       cells, total number of cell.
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71       Using the e flag it can calculate also extended statistics: first quar‐
72       tile, median value, third quartile and percentile 90.
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EXAMPLE

75       Obtain  the  univariate  statistics  for  the raster space time dataset
76       "tempmean_monthly" (precision reduced to 2 decimals in this example):
77       t.rast.univar -e tempmean_monthly
78       id|start|end|mean|min|max|mean_of_abs|stddev|variance|coeff_var|sum|null_cells|cells|first_quartile|median|third_quartile|percentile_90
79       2009_01_tempmean@climate_2009_2012|2009-01-01 00:00:00|2009-02-01 00:00:00|3.90|-3.38|7.43|3.95|1.79|3.20|45.91|1977967.31|503233|1010600|2.80|3.92|5.21|6.23
80       2009_02_tempmean@climate_2009_2012|2009-02-01 00:00:00|2009-03-01 00:00:00|5.91|-1.82|8.01|5.92|1.63|2.65|27.53|2999555.60|503233|1010600|5.44|6.26|7.07|7.48
81       ...
82       2012_11_tempmean@climate_2009_2012|2012-11-01 00:00:00|2012-12-01 00:00:00|8.03|1.79|10.91|8.03|1.32|1.73|16.41|4072472.77|503233|1010600|7.49|8.13|8.96|9.48
83       2012_12_tempmean@climate_2009_2012|2012-12-01 00:00:00|2013-01-01 00:00:00|8.71|1.76|11.98|8.71|1.72|2.95|19.74|4418403.77|503233|1010600|7.84|8.95|9.99|10.67
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SEE ALSO

86        t.create, t.info
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AUTHOR

89       Sören Gebbert, Thünen Institute of Climate-Smart Agriculture
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SOURCE CODE

92       Available at: t.rast.univar source code (history)
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94       Main index | Temporal index | Topics index | Keywords index | Graphical
95       index | Full index
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97       © 2003-2020 GRASS Development Team, GRASS GIS 7.8.5 Reference Manual
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101GRASS 7.8.5                                                   t.rast.univar(1)
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