Which cells are TRUE?
Which returns a RasterLayer with TRUE or FALSE setting cells that are NA to FALSE (unless na.rm=FALSE). If the RasterLayer has numbers, all values that are 0 become FALSE and all other values become TRUE. The function can also return the cell numbers that are TRUE
## S4 method for signature 'RasterLayer' Which(x, cells=FALSE, na.rm=TRUE, ...)
x |
RasterLayer |
cells |
logical. If |
na.rm |
logical. If |
... |
Additional arguments (none implemented) |
RasterLayer
r <- raster(ncol=10, nrow=10) set.seed(0) values(r) <- runif(ncell(r)) r[r < 0.2 ] <- 0 r[r > 0.8] <- 1 r[r > 0 & r < 1 ] <- 0.5 Which(r, cells=TRUE) Which(r > 0.5, cells=TRUE) s1 <- r > 0.5 s2 <- Which(r > 0.5) s1[1:15] s2[1:15] # this expression x1 <- Which(r, na.rm=FALSE) # is the inverse of x2 <- r==0
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