search for: vanwalleghem

...should do the job, but it is not clear to me how to define the input vectors? Is "x" a vector with the fitted probabilities and "s" a vector containing the observed response variable? Or does anybody know an alternative? Any help would be greatly appreciated, Thanks, Tom -- Tom Vanwalleghem Physical and Regional Geography, K.U.Leuven Redingenstraat 16 B-3000 LEUVEN +32(0)16/326414

Dear R helpers, I'm new to R and struggling with applying functions to a spatial grid data frame, called data for example.data has a variable named "slope" and "uparea" Basically, I need to calculate the tan(data$slope)Next, I need to divide data$uparea by data$slope and take the log() of that all In the basic examples I found how to make simple multiplications with a