# freq: Frequency table In raster: Geographic Data Analysis and Modeling

## Description

Frequency table of the values of a RasterLayer.

## Usage

 ```1 2 3 4 5``` ```## S4 method for signature 'RasterLayer' freq(x, digits=0, value=NULL, useNA='ifany', progress='', ...) ## S4 method for signature 'RasterStackBrick' freq(x, digits=0, value=NULL, useNA='ifany', merge=FALSE, progress='', ...) ```

## Arguments

 `x` RasterLayer `digits` non-negative integer for rounding the cell values. Argument is passed to `round` `value` numeric, logical or NA. An optional single value to only count the number of cells with that value `useNA` character. What to do with NA values? Options are "no", "ifany", "always". See to `table` `progress` character to specify a progress bar. Choose from 'text', 'window', or ” (the default, no progress bar) `merge` logical. If `TRUE` the list will be merged into a single data.frame `...` additional arguments (none implemented)

## Value

matrix (RasterLayer). List of matrices (one for each layer) or data.frame (if `merge=TRUE`) (RasterStack or RasterBrick)

`crosstab ` and `zonal `

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10``` ```r <- raster(nrow=18, ncol=36) values(r) <- runif(ncell(r)) r[1:5] <- NA r <- r * r * r * 5 freq(r) freq(r, value=2) s <- stack(r, r*2, r*3) freq(s, merge=TRUE) ```

### Example output

```Loading required package: sp
value count
[1,]     0   288
[2,]     1   143
[3,]     2    82
[4,]     3    64
[5,]     4    42
[6,]     5    24
[7,]    NA     5
[1] 82
value layer.1 layer.2 layer.3
1      0     288     244     221
2      1     143      83      67
3      2      82      74      53
4      3      64      58      53
5      4      42      42      37
6      5      24      28      36
7      6      NA      33      29
8      7      NA      24      17
9      8      NA      26      19
10     9      NA      18      24
11    10      NA      13      21
12    11      NA      NA      14
13    12      NA      NA      11
14    13      NA      NA      17
15    14      NA      NA      12
16    15      NA      NA      12
17    NA       5       5       5
```

raster documentation built on June 18, 2021, 9:08 a.m.