Statistical Designs in R

#____________________________________________________________ # Initial Working #_____________________________________________________________ setwd("D:/R_working/script_book/Lessons") data_shahzad_4=read.csv("study_44.csv",na="***") str(data_shahzad_4) ### conversion of treatments into factors data_shahzad_4 <- within(data_shahzad_4, { Year <- factor(Year) treatment <- factor(treatment) variety <- factor(variety) replication <- factor(replication) }) str(data_shahzad_4)