Message-ID: <1054133288.3ed4cc287af66@webmail.uoguelph.ca>
Date: 2003-05-28T14:48:08Z
From: szhan@uoguelph.ca
Subject: 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 read the real zero as zero.
Thank in advance.
Joshua