Mi primer cuaderno de R

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library(raster)
toy<- raster(ncol=5,nrow=5,xmn=100,xmx=150,
             ymn=100,ymx=150)## pixeles de ese raster es de 25 

toy

class      : RasterLayer 
dimensions : 5, 5, 25  (nrow, ncol, ncell)
resolution : 10, 10  (x, y)
extent     : 100, 150, 100, 150  (xmin, xmax, ymin, ymax)
crs        : NA 

#3 notiene valores 
## hay que llenar
values(toy)<-rnorm(n=25,mean = 0.4,sd=0.15)## llenar de datos el raster con datos que simulan una distribucion normal

values(toy)

 [1] 0.4900900 0.4737740 0.5968681 0.4658505 0.4646939 0.2326567 0.2988936 0.7610042 0.3097503 0.4160675 0.3507249 0.1861105
[13] 0.3853827 0.3432449 0.5660140 0.5807238 0.6237516 0.6441131 0.2857807 0.6212824 0.3777996 0.2904377 0.2087270 0.5126645
[25] 0.4000112

plot(toy)
text(toy*100)

hist(toy)