[R] for loop or Hmisc library trap.rule function syntax error

[Prof Brian Ripley]

Try counting parentheses: they don't match.  A good editor (e.g. R mode in 
Emacs) would make this instantly obvious.

I doubt if data.df(subj,2:7) is what you want, either: perhaps 
data.df[subj, 2:7].  There is much more in that vain.

On Fri, 19 Mar 2004, Neil Skjodt wrote:

> Hello:
> 
> I am new R user stumped why the R code after this paragraph generates "Error: 
> syntax error" messages after each of the last 2 lines. I have tried searching 
> the manuals, Hmisc documentation, contributed manuals, help archives, and 
> Internet. I am running R 1.7.1 under Windows 2000 (I will upgrade when my 
> imminent OS upgrade happens). My data was successfully entered and displayed 
> as data.df whose first row is column labels, whose subsequent rows are 
> separate subject results, whose 2nd to 7th columns are numeric control results 
> (for observations at 0, 30, 60, 90, 120, and 180 min), and whose 8th to 13th 
> columns are numeric treatment results. I am trying to enter the control and 
> test area under the curve values from the Hmisc trap.rule function into 
> "control" and "test" for hypothesis testing. I tried posting this last PM, but 
> my message seems to have been lost. I apologize if this appears as a duplicate 
> message. Thanks. Neil
> 
> ...
> control = c();		 
> test = c();
> 
> for (subj in 1:11) {
> 
>   rownum = subj+1	  # add one to subject as first row is column labels
>   control(subj)=trap.rule(c(0,30,60,90,120,180),c(data.df(subj,2:7))
>   test(subj)=trap.rule(c(0,30,60,90,120,180),c(data.df(subj,8:13))
> }
> ...
> 
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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