Description Usage Arguments Details Value Examples

View source: R/rasterLocalSums.R

`rasterLocalSums`

finds the local sum within the weighted neighborhood of W.

1 | ```
rasterLocalSums(r, W)
``` |

`r` |
An in memory raster image. |

`W` |
A matrix of weights. The sums will be applied at each centroid. Dimensions must be non-zero and odd. Only non-missing neighbors are used in the sum. |

A spatial neighborhood is calculated for each pixel in `r`

.
The spatial neighborhood for each pixel is defined by the weight matrix
`W`

, where the center of the odd dimensioned matrix `W`

is identified
with the target pixel. The target pixel value is replaced with the sum of
all pixels within the neighborhood weighted by `W`

. Only non-missing
or neighbors with non-zero weights are used in the calculation.

An in memory raster image of local sums.

1 2 3 | ```
r <- raster::raster( matrix(rnorm(36),6,6))
W <- matrix(1,3,3)
sumR <- rasterLocalSums(r,W)
``` |

jlisic/rasterKernelEstimates documentation built on May 17, 2017, 11:24 p.m.

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