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Hi! I would like to be able to create formulas automatically. For example, I want to be able to create a function that takes on two values: resp and x, and then creates the proper formula to regress resp on...
Thank you for your answers yesterday. I now have another question! Suppose that instead of creating a formula for a regression model I simply wanted to add the variables. I believe I cannot use the as.formula anymore. Again I...
Hi. My data contains information for 10 hospitals for 12 different measures. Let's call it x1-x12. I need to create a boxplot for each one of this measures and put them into one page. Each plot also needs...
Thank you for your responses. Prof Ripley's code only worked for a vector with 2 variables but I need the code to work for a vector of any size. To solve this I created a for loop. I'm...
Hi! Suppose I have m objects. I need to find out what are all possible ways I can group those m objects into r groups. Moreover, I need to create a matrix that contains what those arrangements are. I've...
Hi! When running the following code I get the message: Error in eval(expr, envir, enclos) : object "A" not found fm <- function(p,ydata, env = parent.frame()) { #fit model y ~ (b0+b1x1+...+bpxp)*exp(g2plus*z2plus) where bi and g2plus...
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