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...I get an error like this " Selection: 2Error in print(basic.gof(.cur.db)) : error in evaluating the argument 'x' in selecting a method for function 'print': Error in xvardef(v, object) : object '.cur.db' not found Could you please tell me how to treat it? Thanks, Xiaocong [[alternative HTML version deleted]]

Dear all, I download RStudio and install it,but I donnot know why I cannot see the upload icon in the Files window? Could you please help me? Thank you. Xiaocong [[alternative HTML version deleted]]

Hi, when I run the below code,there is an error occured. could you please tell me how to treat it? > pdf('covariate.pdf') > par(mfrow=c(1,1)) > pairs(data2[,c("ID","TYPE","AGE","GNDR","HT")], + panel=function(x,y) { points(x,y); lines(lowess(x,y))}) Error in `[.data.frame`(data2, , c("ID", "TYPE",

Hi,all, when I run the below code,there is an error occured. could you please tell me how to treat it? > pdf('covariate.pdf') > par(mfrow=c(1,1)) > pairs(data2[,c("ID","TYPE","AGE","GNDR","HT")], + panel=function(x,y) { points(x,y); lines(lowess(x,y))}) Error in `[.data.frame`(data2, , c("ID", "TYPE",

Hi, Dear all, Could you please tell me how to select specified column in dataset and how to do the concentration-time profiles in R? Thank you! xiaoc [[alternative HTML version deleted]]