Re: [R-sig-eco] Cross validate model with calibrate

2013-11-02 Thread Jari Oksanen
Dear Philipp, I cannot see anything wrong in your approach. The only problem is that RDA may not do very well. It is very common that the calibrated values are outside the original range of the data and if the predictions are not very good, they can also be unrealistic values. RDA has no idea

[R-sig-eco] Cross validate model with calibrate

2013-11-01 Thread Philipp01
Hello all, I would like to cross validate my rda() derived model with the calibrate function (vegan package) and calculate the RMSE as value for performance measure. For simplicity I use the example from the predict.cca {vegan} help. library(ade4) library(vegan) data(dune) data(dune.env) nbr