how to extract rows and column of dataframe in r
df[,] #All rows and cols
df[1,] #1st row and all cols
df[1:2,] #First two rows and all cols
df[c(1,3),] #First and third row and all cols
df[1,2:3] #First row and 2nd-3rd col
df[1:2,2:3] #First,second row and Second and third cols
df[,1] #All rows and just first column
#df[,c(1,3)] # all rows and first and third col