Dear list,
I have problem that I cannot solve and would like to ask your opinion. I
tried to ask a few days ago already but got no answer and all my attempts to
solve it by myself since then failed. Sorry for repeated posting! Here the
problem broken down a bit.
My problem basically is, that I want to use the elements of a character
vector as names for objects and by recalling only the subscript of the
character vector get the object information I assigned.
Example:
vector of names created as follows:
char <- paste("A",1,sep="")
for (i in 2:10) {char[i] <- paste("A",i,sep="")}
char
[1] "A1" "A2" "A3" "A4" "A5" "A6" "A7" "A8" "A9" "A10"
Now assign each element as name for a data frame:
(d <-
data.frame(cbind(X1=1,Y1=1:10,X2=1,Y2=1:10,X3=1,Y3=1:10,X4=1,Y4=1:10,X5=1,Y5
=1:10,
X6=1,Y6=1:10,X7=1,Y7=1:10,X8=1,Y8=1:10,X9=1,Y9=1:10,X10=1,Y10=1:10)))
x <- paste("X",1,sep="")
y <- paste("Y",1,sep="")
for (i in 2:10) {x[i] <- paste("X",i,sep="")
y[i] <- paste("Y",i,sep="")}
for (k in 1:10) {assign(char[k],d[,c(x[k],y[k])])}
If I call "A1", I get a dataframe with columns "X1" and "Y1", so far so
good.
Now the trouble part:
nam <- paste("test",1,sep="")
for (i in 2:10) {nam[i] <- paste("test",i,sep="")}
for (i in 1:10){assign(nam[i],as.ltraj(xy=char[1],date=DATE,...)
????????????
Please don't get carried away by as.ltraj, it's an object type of the
package adehabitat to analyze animal tracks. However, I need to feed it the
xy (coordination) information in form of a data frame. I have 20 animals to
analyze (per different setup), so I want it to work in a handier way than
keep pushing buttons. By the way I handle it now, I only hand over the term
"A1" but not the data frame "A1".
How can I solve this. Turning the vector into a list does not work and I am
not sure if there's something I can do...
Please help if you can! Many thanks in advance already.
Jacqueline
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