# NOT RUN {
y <- c(0.112220988, 0.055554941, 0.013333187, 0.055554941, 0.063332640, 0.014444285,
0.015555384, 0.057777140, 0.059999339, 0.034444068, 0.058888242, 0.136665165,
0.038888458, 0.096665606,0.141109571, 0.015555384, 0.012222088, 0.012222088,
0.072221428, 0.052221648, 0.087776810,0.014444285, 0.033332966, 0.012222088,
0.032221869, 0.059999339, 0.011110989, 0.011110989,0.042221759, 0.029999670,
0.018888680, 0.098887801, 0.016666483, 0.031110767, 0.061110441,0.022221979,
0.073332526, 0.012222088, 0.016666483, 0.012222088, 0.122220881, 0.134442955,
0.094443403, 0.128887475, 0.045555055, 0.152220547, 0.071110331, 0.018888680,
0.022221979, 0.029999670, 0.035555165, 0.014444285, 0.049999449, 0.074443623,
0.068888135, 0.062221535, 0.032221869, 0.095554501, 0.143331751, 0.121109776,
0.065554835, 0.074443623, 0.043332856, 0.017777583, 0.016666483, 0.036666263,
0.152220547, 0.032221869, 0.009999890, 0.009999890, 0.021110879, 0.025555275,
0.099998899, 0.015555384, 0.086665712, 0.008888791, 0.062221535, 0.044443958,
0.081110224, 0.015555384, 0.089999005, 0.082221314, 0.056666043, 0.013333187,
0.048888352, 0.075554721, 0.025555275, 0.056666043, 0.146665052, 0.118887581,
0.125554174, 0.024444176, 0.124443069, 0.012222088, 0.126665279, 0.048888352,
0.046666153, 0.141109571, 0.015555384, 0.114443190)
plot(y, type="l", lty = 3, main="Savitzky-Golay with l = 51, 25, 10")
lines(sg.smooth(y),col="red", lwd=2)
lines(sg.smooth(y, l = 25),col="blue", lwd=2)
lines(sg.smooth(y, l = 10),col="green", lwd=2)
#### function applied to a raster stack and sp object
library(raster)
random.raster <- function(r=50, c=50, l=10, min=0, max=1){
do.call(stack, replicate(l, raster(matrix(runif(r*c, min, max),r,c))))
}
r <- random.raster()
# raster stack example
( r.sg <- calc(r, sg.smooth) )
# sp SpatialPixelsDataFrame example
r.sp <- as(r, "SpatialPixelsDataFrame")
r.sp@data <- as.data.frame(t(apply(r.sp@data, MARGIN=1, FUN=sg.smooth)))
# }
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