# Re: [R] :HELP

From: John Kane <jrkrideau_at_yahoo.ca>
Date: Sun, 03 Apr 2011 08:50:25 -0700 (PDT)

Your message is severely garbled. However a={1,2,3,4,5 6,7,8,9,10} is not going to work since {} is incorrect. you need c()

Anyway try this:

a=matrix(1:10,ncol=2)
sum(a[1:3,1])
sum(a[1:3,2])

• On Sun, 4/3/11, mustafabinar <mustafa_binar_at_mynet.com> wrote:

> From: mustafabinar <mustafa_binar_at_mynet.com>
> Subject: [R] :HELP
> To: r-help_at_r-project.org

> Received: Sunday, April 3, 2011, 9:10 AM
> Hello,
> &nbsp;
> I want to sum first three terms of each column of matrix.
> But I don't calculate with "apply" function.
> &nbsp;
> skwkrt&lt;-function(N=10000,mu=0,sigma=1,n=100,
> nboot=1000,alpha=0.05){
> x&lt;-rnorm(N,mu,sigma)#population
> samplex&lt;-matrix(sample(x,n*nboot,replace=T),nrow=nboot)
> #...
> }
> &nbsp;
> is that: suppose a is a 5x2 matrix.
> &nbsp;a={1,2,3,4,5
> 6,7,8,9,10}
> &nbsp;
> I want to sum first three terms.
> sm[1]=1+2+3
> sm[2]=6+7+8
>
>     [[alternative HTML version deleted]]
>
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