#INSTRUCTIONS: type the commands in R studio - but do not #run them, first ask yourself and note down, what *do you #think* would R say? Only then run them in R studio. This is the #only way to learn simple commands - and have them #memorized so that you can write code without having to check #every single command. Also, use the Data101 laboratory site #and run the codes (always asking yourself FIRST, what #will R say?)
 
 #PRACTICE:
 
 
 weather =data.frame(Day=c('weekday', 'weekend'), Conditions =c('sunny','rainy','cloudy', 'snow', 'storm','ice'))
 weather$temperature =c(80, 70, 65, 40, 30,25)
 weather[weather$temperature > 40, 1]
 #what will R say?