search for: reaks

Dear everyone I am a bit of a computer imbecile and are having problems with R. I am using R in my research project to do chi-square tests on data imported from excel . However I have som missing data in one of my variables (columns) and I need R to "exclude" these and make chi-square test on the data that I have. I use a formula to make 2x2 tables which is: data <-

I have a web in development. I need to upload some images and to resize them in a form. I am able to upload some imags thanks to paperclip, but I have problems resizing this images. I am becaming mad trying to make work ImageMagik and Rmagick and I think it will became a lot worse once I find a host a put the web in production. So I wonder if its another way to resize images. I have used other

...ually exclusive events, and a "remainder" class with a probability p0=1-p1-p2-....-pk, and need to calculate, for a given number of trials t>=k, the combined probability that each of the classes 1...k contains at least 1 "event" (the remainder class may be empty). To me this reaks of a sum of multinomial distributions, and indeed, I can readily calculate the correct answer for small figures t,k using a small R program. However, in my typical experiment, k ranges from ~20-60 and t from ~40-100, and having to calculate these for about 6e9 experiments, a quick calculation on t...