On 31/10/15 14:15, Val wrote:
Hi all,
Iam trying to change character to numeric but have probelm
mydata <- read.table(header=TRUE, text=', sep=" "
id sex
1 NA
2 NA
3 M
4 F
5 M
6 F
7 F
')
if sex is missing then sex=0;
if sex is"M" then sex=1;
if sex is"F" then sex=2;
Any help please ?
sex <- c(NA,NA,"M","F","M","F","F")
# 1.
match(sex,c(NA,"M","F"))-1
# 2.
as.numeric(factor(sex,exclude=NULL,levels=c(NA,"M","F")))-1
cheers,
Rolf Turner
P. S. As others have told you, converting character to numeric is highly
ill-advised.
R. T.
--
Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276
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