Message-ID: <1363553418.26063.YahooMailNeo@web142602.mail.bf1.yahoo.com>
Date: 2013-03-17T20:50:18Z
From: arun
Subject: help with simple function
In-Reply-To: <CANhKaPCDPLznigmnQVS=rOqy9xyrUDr4hjMK0MN55hRiw3wROA@mail.gmail.com>
Hi,
?Y1<- 1:4
?Y2<- 5:8
sqrt(var(Y1)+var(Y2)^2)-4*((var(Y1)*(var(Y2)-cov(Y1,Y2)^2)))
#[1] 9.515593
A.K.
----- Original Message -----
From: Miguel Eduardo Delgado Burbano <mdelgadoburbano at gmail.com>
To: r-help at r-project.org
Cc:
Sent: Sunday, March 17, 2013 11:47 AM
Subject: [R] help with simple function
hello all
I am writing a quite simple script to study dental wear patterns in humans
and I wrote this function
sqrt(var(Y1)+var(Y2))^2-4(var(Y1)*(var(Y2)-cov(Y1,Y2)^2)) but appear this
error message
Error: attempt to apply non-function
alternatively I wrote this
sqrt(var(Y1)+var(Y2)^2)-4[(var(Y1)*(var(Y2)-cov(Y1,Y2)^2))]
but this error message appear
[1] NA
Warning message:
NAs introduced by coercion
some suggestion to solve this?? thank you so much for your help
Miguel
??? [[alternative HTML version deleted]]
______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.