Try:
table.1[[hold[1]]]
Cheers,
Simon.
On 19/07/10 12:09, Seth wrote:
Hi,
What I would like to do is have a data.frame with column names and have
these column names stored as strings in another vector. Then I would like
to be able to access the data.fram columns via referencing the vector of
names. The code below shows the last few executions that failed to retrieve
the values for column named X1. Seth
table.1<-cbind(c(1,2,3,2,2),c(0,9,0,7,9),c(7,5,9,8,8))
table.1
[,1] [,2] [,3]
[1,] 1 0 7
[2,] 2 9 5
[3,] 3 0 9
[4,] 2 7 8
[5,] 2 9 8
table.1<-data.frame(table.1)
table.1
X1 X2 X3
1 1 0 7
2 2 9 5
3 3 0 9
4 2 7 8
5 2 9 8
hold<-c("X1","X2","X3")
hold
[1] "X1" "X2" "X3"
table.1$X1
[1] 1 2 3 2 2
hold[1]
[1] "X1"
table.1$hold[1] # FROM HERE DOWN ARE MY ATTEMPTS TO ACCESS X1
NULL
table.1$(hold[1])
Error: unexpected '(' in "table.1$("
table.1$get(hold[1])
Error: attempt to apply non-function
table.1$(get(hold[1]))
Error: unexpected '(' in "table.1$("
--
Simon Blomberg, BSc (Hons), PhD, MAppStat.
Lecturer and Consultant Statistician
School of Biological Sciences
The University of Queensland
St. Lucia Queensland 4072
Australia
T: +61 7 3365 2506
email: S.Blomberg1_at_uq.edu.au
http://www.uq.edu.au/~uqsblomb/
Policies:
1. I will NOT analyse your data for you.
2. Your deadline is your problem
Statistics is the grammar of science - Karl Pearson.
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