如何处理R中的NaN？

Question

I have two binary files with the same dimensions(corr and rmse ).I want to do this: replace all pixels in rmse by NA whenevr corr is NA.

file1:

conne <- file("D:\\omplete.bin","rb")
corr<- readBin(conne, numeric(), size=4,  n=1440*720, signed=TRUE)

file2:

rms <- file("D:\\hgmplete.bin","rb")
rmse<- readBin(rms, numeric(), size=4,  n=1440*720, signed=TRUE)

I did this:

rmse[corr==NA]=NA 

did not do anything, so I tried this:

rmse[corr==NaN]=NA 

did not do anything either! Can anybody help me on this.

Head of the file corr:

> corr
[1] NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN 

Answer 1

You need to use the logical test is.nan() . In this case:

rmse[is.nan(corr)]=NA

should do the trick