Re: [R] help! kennard-stone algorithm in soil.spec packages does not work for my dataset!!!

2011-07-15 Thread tauQSAR
I'm also trying to use the kennard-stone algorithm in the soil.spec package for my dataset, (to generate a training and test set from the data, based on this algorithm, because it's the most commonly used and well-performing algorithm in QSAR studies) but it's generating an error:

Re: [R] scientific (statistical) foundation for Y-RANDOMIZATION in regression analysis

2011-07-11 Thread tauQSAR
Hello, I'm also working on a QSAR validation, and would like to confirm that my multiple least squares regression based on only 4 x-variables out of a pool of 300 x-variables is significant. I want to apply the y-randomization or y-scrambling permutation protocol using R, but I have not been able