[R] shapiro-wilks test
Sukhaswami Malladi
smalladi at lexgen.com
Fri Dec 21 16:55:39 CET 2001
Hello,
I am a newbie to R. I would like to test my data for normality using the
Shapiro-Wilks
test. How do I go about it ?
My data is in form of a table with 2 columns - colA, colB and I want to know
if
colB values are a normal distribution.
First I read the data into R using
d <- read.table("tab.dat",header=T)
Then if I type
shapiro.test(d)
I get the error message:
Error in "[.data.frame"(x, complete.cases(x)) :
undefined columns selected
and if I type
shapiro.test(d.colB)
I get message:
Error in inherits(x, "factor") : Object "d.colB" not found
What is the correct syntax and how do I obtain this syntax from any help
documentation ?
Any suggestion is greatly appreciated.
Thanks
Sukhaswami Malladi
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