Raster to ASCII export in R- ASCII full of NA's-CodePudding

I am trying to export a raster file (.tif) as an ascii in R for subsequent analysis. The goal is to replicate

Most of the image is light blue, that is, covered with cells that are NA

You can remove most NAs with trim

y <- trim(x)
plot(y, colNA="light blue")

You are not saying why you are creating an ascii file. I assume that you want to read the values with some other tool that does not know about spatial data file formats. In that case you might consider as.data.frame with na.rm=TRUE instead.

d <- as.data.frame(x, na.rm=TRUE, cells=TRUE)
head(d)
#       cell      ntl
#44592 44592 3.615484
#44593 44593 6.819953
#45010 45010 2.256919
#45011 45011 3.350195
#45012 45012 9.617457
#45013 45013 8.812189

And then save it to file, for example with

write.csv(d, "test.csv", row.names=FALSE)