[R] Warning message: numerical expression has 1000 elements: only the first used

Özgür Asar
Thu, 31 May 2012 06:08:42 -0000

Hi,

Your mistake seems to be in

sum(v[1:x])

You create "x" as a vector but your treat it as a single number.

v[1:x] expects "x" to be a single number and only considers its first
element which is 1.

If I understand your query correctly, the following might handle your
problem:

sum.vec <-NULL
for (x in 1:1000){
t <- rbinom(1000, 1, 0.5)
v <- replace(t,t==0,-1)
sum.vec<-c(sum.vec,sum(v[1:x]))
}

Best
Ozgur

-----
************************************
Ozgur ASAR

Research Assistant
Middle East Technical University
Department of Statistics
06531, Ankara Turkey
Ph: 90-312-2105309
http://www.stat.metu.edu.tr/people/assistants/ozgur/
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