[R] Resample with replacement to produce many rarefaction curves with same number of samples

[Nick Pardikes]

Greetings,
I am currently having difficulty producing a graph using rarecurve in
the vegan package. I have produced rarefaction curves (seen below)
using the following code.


library(vegan)

myMat <- round(matrix(rlnorm(2000), 50)) #creates distribution of communities

netdata <- as.data.frame(myMat) #generates a matrix of communities
(rows), species (columns)

raredata <- rarecurve(netdata, label=F, col=rgb(0, 0, 1, 0.1))  #uses
rarecurve to plot a rarefaction for each individual community (n=50)


However I would like to produce a graph in which all rarefaction
curves end at the same sample size. For example, in this graph it
would be great to extend the x-axis (sample size) to 100 and have all
curves end at this point. Is there any way to use rarecurve to
resample a community (row) with replacement the same number of times
for all 50 communities? With replacement is important because the
communities differ greatly in their size (number of species).


I understand that rarefaction is useful to compare communities with
different sample efforts, but I would still like to generate the
figure. My actual data has 5000 simulated communities that differ
greatly in matrix size and number of samples.


Thank you in advance for your help and suggestions.


Cheers,

Nick


-- 
Nick Pardikes
PhD Candidate
Program in Ecology, Evolution, and Conservation Biology
University of Nevada
https://nickpardikes.wordpress.com/
nickpardikes at gmail.com