Dear list i have a sample question
I have a dataframe of 1500 species and 13 life history traits.
small example code:
traits <- data.frame(letters[1:9],
sample(letters, 9),
sample(letters, 9),
sample(letters, 9),
sample(letters, 9),
sample(letters, 9),
sample(letters, 9),
sample(letters, 9),
sample(letters, 9))
colnames(traits) <- c("species", 1:8)
What i want to do is:
Sample a number of species from the data frame in integers of 50: - 50
species, 100 species ,150,200... up-to 1500, when i sample them i also want the
traits associated with them to be kept intact. For each species number i would
like a 1000 repetitions. So i would like 50 species with their life history
traits randomly sampled 1000 times, then 100 species with their life history
traits sampled 1000 times. I appreciate that as i get to the higher numbers i.e
1500 species this will only be sampled once, therefore i will need to use
replace = yes.
Then i have a function i want to run on the sample so for the 50 species i
want to run a function which requires the name of the sample
GFD(50species_sample1)
GFD(50species_sample2) etc to
GFD(50species_sample1000)
Then
GFD(100species_sample1)
etc.
With the reults put into a data-frame.
I am relatively new to R, i could probably hack together a code but i am unsure
how to join it up so i sample, retain the data and then use it in a function?
Any help would be greatly appreciated.
I appreciate this is a lot to ask so any help would be greatly appreciated.
Thanks in advance,
Chris
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