Problems in creating a new column and looping a formula from first column. code i made and error message is displayed below.

1
votes

str(st1) 'data.frame': 4 obs. of 1 variable: $ st: num 1 2 3 4 st1$z=" " summary(st1) st z
Min. :1.00 Length:4
1st Qu.:1.75 Class :character
Median :2.50 Mode :character
Mean :2.50
3rd Qu.:3.25
Max. :4.00

for(i in 1:nrow(st1)) { st1$z[i]= (st1$st-mean(st)/sd(st))} Warning messages: 1: In st1$z[i] <- (st1$st - mean(st)/sd(st)) : number of items to replace is not a multiple of replacement length 2: In st1$z[i] <- (st1$st - mean(st)/sd(st)) : number of items to replace is not a multiple of replacement length 3: In st1$z[i] <- (st1$st - mean(st)/sd(st)) : number of items to replace is not a multiple of replacement length 4: In st1$z[i] <- (st1$st - mean(st)/sd(st)) : number of items to replace is not a multiple of replacement length

1
r

1 Answers

1
votes

Try this:

   for(i in 1:nrow(st1)) { 
        st1$z[i]= (st1$st[i]-mean(st)/sd(st))
    }