R help - Mar 2004 - for loop or Hmisc library trap.rule function syntax error

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))
}
...

On Fri, 19 Mar 2004 07:49:26 -0700
Neil Skjodt <neil.skjodt at ualberta.ca> 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();
You need to spend time with the manuals.  Remove ; from end of line, set
aside vectors of full length, use [ ] for subscripting and subsetting;
remove rownum; recognize that first row should not be "column labels".

Frank Harrell
> 
> 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))
> }
---
Frank E Harrell Jr   Professor and Chair           School of Medicine
                     Department of Biostatistics   Vanderbilt University

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)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595