Re: [R] how well *new data* fit a pre-computed model

Here is a link to a plot that illustrates the question: bio.lmu.de/~pavlidis/pg1.pdf the question is how to evaluate whether the blue points fit the curve well enough. The curve has been produced from the black points best pavlos On Sun, Oct 27, 2013 at 1:30 PM, Pavlos Pavlidis wrote: >

[R] how well *new data* fit a pre-computed model

; about 10 points) for "the expression values of gene A under condition G over time". The question is: how can I evaluate how well the dataset B fits the model generated by dataset A? kind regards, pavlos -- Pavlos Pavlidis, PhD Foundation for Research and Technology - Hellas Institute

Re: [R] [solved] t-test behavior given that the null hypothesis is true

rwise the Welch (or Satterthwaite) approximation > to the degrees of freedom is used. > > This has the effect of somewhat adapting the test procedure to > the data, so that extreme (i.e. small) values of P are even > rarer than they should be. > > With best wishes, > Te

[R] t-test behavior given that the null hypothesis is true

Dear all, I observer a strange behavior of the pvalues of the t-test under the null hypothesis. Specifically, I obtain 2 samples of 3 individuals each from a normal distribution of mean 0 and variance 1. Then, I calculate the pvalue using the t-test (var.equal=TRUE, samples are independent). When I