replace groups of variables' value

[Chen Samulsion]

Dear Stata users,

Suppose we have groups of variables whose values are coded as zero or one. Now we want to replace values of zero to two. It seems that we have to use a loop to come at this in Stata. For example the Code1 below. I want to write a program to automate this operation without writing loops each time, see the Program1 below. The program, I call it -replaceg-, seems work well, and would anyone in this forums help me to debug this little program and improve it. Thank you!

// Code1
input x y z
0 1 1
0 1 0
1 0 1
1 0 0
1 1 0
1 1 1
0 0 1
0 0 0
1 0 1
end

foreach v of varlist x y z {
 replace `v'=2 if `v'==0
 }

// Program1
program define replaceg

syntax varlist, old(real) new(real)
 tokenize `varlist'
 foreach v of varlist `varlist' {
   replace `v'=`new' if `v'==`old'
 }
  
end

[Joseph Coveney]

help recode

[Chen Samulsion]

Joseph Coveney, thank you very much, I do forgot to use -recode-.