Group String variables together

[Senor Edward]

Is it possible to group all String variables in the dataset together. I created this code, but it doesn't do what I want.

foreach v of varlist _all{
capture confirm string `v'
if _rc{
order `v', first
}
}

I want all the string variables to be put to the front of the dataset.

[Nick Cox]

Your approach doesn't work because the return code will be 0 if the variable is string. Your code does the opposite, sort the numeric variables to first.

Alternatively,

ds, has(type string)
order `r(varlist)'