Hi everybody,
I'm kind of surprised that I didn't get any answer to my question... Is
it not interesting? Is it not well explained? Am I doing something
wrong? Was it lost in the hundreds of other emails during the weekend?
I hope it is because of my last guess. So I'll just send the email again
(see below).
I really need some help on this matter.
Thanks in advance.
To run some statistical tests from the package WRS (from Rand R
Wilcox), I need to store my data in a list, which fac2list() from this
package does very well.
But I would like to do it in a loop for each numerical variable. It
would be easier!
For now, I have the loop with the extraction and storage into a list.
The code is below.
-----
# Defines variables
file <- ssfamed #data file object to be used
spec <- "cotau" #species selection
bone <- "tx" #tooth row selection
cat <- 3 #column indexe to be used
as categorical variable
seq.num <- c(seq(7,21,1)) #column indexes to be used as
numerical variables
# Select data for species and tooth row
select <- file[file$SPECSHOR==spec & file$BONE==bone, ]
#Separate the data from each numeric variable in seq.num (select[,k])
into groups from levels in select[cat] and store into list mode.
for(i in 1:length(seq.num)) {
k <- seq.num[i]
name.num <- names(file)[k]
TO_POS_Asfc.median_cotautx <- fac2list(select[,k], select[cat])
names(TO_POS_Asfc.median_cotautx) <- levels(factor(select[[cat]]))
}
-----
What I want to do is, instead of giving manually the name of the list
(here TO_POS_Asfc.median_cotautx), I would like the name of the list
to be created in the loop too, so that it looks like:
select[[cat]]_name.num_specbone. In the code it would look like:
-----
select[[cat]]_name.num_specbone <- fac2list(select[,k], select[cat])
#create the list from the values of these variables at each iteration
of the loop
names(select[[cat]]_name.num_specbone) <- levels(factor(select[[cat]]))
-----
I thought about using paste(), but I cannot create an object like this.
In my small R life, I've always stored data into pre-defined objects,
I have no idea how to create an object automatically within a loop.
Is my question clear? I hope so. I thought there might be a function
that would create an object where the name would come from a string
stored in an other object.
Why do I want that? Simply because I want to run several statistical
tests on each list and I would therefore like to have standardized
names for the data objects.
There might be easier ways to do what I want to, I'm open to all
suggestions but I would prefer to stay close from my idea (I would
understand better!)
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