Math-methods | R Documentation |

Standard mathematical methods for computations with SpatRasters. Computations are local (applied on a cell by cell basis). If multiple SpatRasters are used, these must have the same extent and resolution. These have been implemented:

`abs, sign, sqrt, ceiling, floor, trunc, cummax, cummin, cumprod, cumsum, log, log10, log2, log1p, acos, acosh, asin, asinh, atan, atanh, exp, expm1, cos, cosh, sin, sinh, tan, tanh, round, signif`

Instead of directly calling these methods, you can also provide their name to the `math`

method. This is useful if you want to provide an output filename.

The following methods have been implemented for `SpatExtent`

: `round, floor, ceiling`

`round`

has also been implemented for `SpatVector`

, to round the coordinates of the geometries.

```
## S4 method for signature 'SpatRaster'
sqrt(x)
## S4 method for signature 'SpatRaster'
log(x, base=exp(1))
## S4 method for signature 'SpatRaster'
round(x, digits=0)
## S4 method for signature 'SpatRaster'
math(x, fun, digits=0, filename="", overwrite=FALSE, ...)
## S4 method for signature 'SpatVector'
round(x, digits=4)
## S4 method for signature 'SpatRaster'
cumsum(x)
```

`x` |
SpatRaster |

`base` |
a positive or complex number: the base with respect to which logarithms are computed |

`digits` |
Number of digits for rounding |

`fun` |
character. Math function name |

`filename` |
character. Output filename |

`overwrite` |
logical. If |

`...` |
additional arguments for writing files as in |

SpatRaster or SpatExtent

See `app`

to use mathematical functions not implemented by the package, and `Arith-methods`

for arithmetical operations. Use `roll`

for rolling functions.

```
r1 <- rast(ncols=10, nrows=10)
v <- runif(ncell(r1))
v[10:20] <- NA
values(r1) <- v
r2 <- rast(r1)
values(r2) <- 1:ncell(r2) / ncell(r2)
r <- c(r1, r2)
s <- sqrt(r)
# same as
math(r, "sqrt")
round(s, 1)
cumsum(r)
```

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