ah, I see! Thanks you for the assistance! I can see how I went wrong.
________________________________________
From: arun <smartpink...@yahoo.com>
Sent: Friday, January 31, 2014 2:59 PM
To: r-help@r-project.org
Cc: Mathew Nagendran
Subject: Re: [R] Defining function help
Hi,
Not sure if this is what you wanted:
t.control=function(m, a){(1-exp(-a*m)*((1-(1/30))*m))}
t.sham=function(m, a, d){(1-exp(-a*(1-d)*m)*((1-(1/30))*m))}
t.control(2,2)
#[1] 0.9645898
t.sham(2,2,0.1)
#[1] 0.9471741
A.K.
On Friday, January 31, 2014 12:29 PM, Mathew Nagendran
<mathew.nagend...@mail.utoronto.ca> wrote:
Hello everyone. I am quite new to R and I would appreciate some help in
figuring out what I am doing wrong.
For the following code:
> #with cost
>
> m.control=c(1.45,9.40,9.96,4.2,1.86,0.2)
> m.sham=c(3.39,23.94,23.62,10.08,2.99,1.09)
>
> t.control=function(m, a){(1-exp(-a*m)*(1-(1/30)*m))}
> t.sham=function(m, a, d){(1-exp(-a*(1-d)*m)*(1-(1/30)*m))}
>
> t.sham(2, 2, 0.1)
[1] 0.9744979
> t.control(2, 2)
[1] 0.9829054
>
> #without cost
>
> m.control=c(1.45,9.40,9.96,4.2,1.86,0.2)
> m.sham=c(3.39,23.94,23.62,10.08,2.99,1.09)
>
> t.control=function(m, a){(1-exp(-a*m))}
> t.sham=function(m, a, d){(1-exp(-a*(1-d)*m))}
>
> t.sham(2, 2, 0.1)
[1] 0.9726763
> t.control(2, 2)
[1] 0.9816844
As you can see the values I am getting for t.control and t.sham are larger in
the "with cost" scenario and this shouldn't be the case. (the cost is
1-1/30*m). Is there something wrong I did when defining t.sham and t.control in
the "with cost" section that I am failing to see?
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
