[R] Efficient ways of finding functions and Breslow-Day test for homogeneity of the odds ratio
Dear all, I have been trying to find a function to calculate the Breslow-Day test for homogeneity of the odds ratio in R. I know the test can be preformed in SAS but i was wondering if anyone could help me to perform this in r. In addition i have the fullrefman file to search for functions in the basic R packages, does anyone have any suggestions of an efficient way of searching for functions in the other add-on packages on the website? Thanks in advance Malcolm __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] Relative Risk and Confidence Intervals
Dear all, Despite searching the fullrefman file I have been unable to locate a function to calculate the relative risk and confidence intervals from a simple 2 by 2 contingency table. Can anyone tell me how this is done. Thanks in advance Malcolm -- MJ Price, Social Medicine [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] half-normal residual plots
Hi all, I am trying to produce a half-normal plot of residuals from a GLM. I have found the qqnorm function for producing a normal plot but can't figure out how to produce a half-normal. Can anyone help with this? Thanks Malcolm -- MJ Price, Social Medicine [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
[R] parameterisation of Factor levels
Hi all, I am trying to fit simple 2 factor (factors A and B - 3 and 2 levels respectively) poisson regression model. Inititially a pure error model is fitted and significance tests are performed on each parameter. I wish to remove an individual parameter from the model - the interaction between the second level of factor A and factor B. However i only seem to be able to remove the AB (all interactions between A and B) term, which is no use as it also removes the interaction term between level 3 of Factor A and factor B. Can anyone help with this. Thanks Malcolm -- MJ Price, Social Medicine [EMAIL PROTECTED] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
