R file to change

#'Rstudio environment
#'===

#'Top Left - scripts
#+
myfirstvariable = "Hello R"  #press control enter with cursor on line
myfirstvariable
As_samp1 = 34

#'practical: create variables for arsenic concentration in 2 more samples
#+
#'YOUR_ANSWER
As_samp2 = 36
As_samp3 = 38

#'END_ANSWER
#+
#'Bottom Left - console
#+
2+2

#'practical: calculate average As concentration, store result in variable As_mean
#+
#'YOUR_ANSWER
As_mean<- (As_samp1 + As_samp2 + As_samp3)/3
#'END_ANSWER
#+
#'A word on comments
#This is a comment
#ignore #' and #+ <br/><br/>