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colum
2003 May 28
1
Zero is not zero
Hello, There:
I read data from tab-delimted text file(1888.txt) in C:/temp, which has
thousands rows and 80 colulms, using read.delim("C:/temp/1888.txt"). when I
retrieved the numeric coulum which has real zero values and applies R buid-in
function such as mean( ), sum() and got a result of NA. It seems that R (R
1.6.2 in windows) considers zero as missing value (NA). Thus my question is
how to re...