search for: meandiff

Dear all: Plan 1: I want to do serval t-test means for different variables in a loop , so I want to add all results to an object then dump() them to an text. But I don't know how to append T-test result to the object? I have already plot the barplot and I want to know an elegant way to report raw result. Can anybody give me some pieces of advice? Yao He ????????????????????????? Master

...el displaced depending on a clinical condition. I thought to a Tukey Mean Difference Plot would show me the difference betweenthe two values. I don't have the literature how the plot gets constructed, but my understanding from http://www.itl.nist.gov/div898/software/dataplot/refman1/auxillar/meandiff.htm is that the first from each distribution a qq plot is constructed and than the coardiantes of the qq-plot are transformed according the formula x=x+y/2 and y=x+y. I tried this with tmd(xyplot(a ~ b| c, data=data)) with a and b holding my log10 transformed numerical values, and c the condi...

Hi everyone- I have a dataset with multiple "pre" and "post" variables I want to compare. The variables are named "apple_pre" or "pre_banana" with the corresponding post variables named "apple_post" or "post_banana". The variables are in no particular order. apple_pre orange_pre orange_post pre_banana apple_post post_banana person_1