Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.

# Re: st: identifying how many digits string var has

 From Nick Cox To statalist@hsphsun2.harvard.edu Subject Re: st: identifying how many digits string var has Date Sun, 3 Apr 2011 08:28:46 +0100

```Joerg Luedicke  gave you a solution with -length()-.

-strlen()- and -length()- are just different names for the same function.

What you did wrong was that

... if strlen(`x')

is to be thought of as a contraction for

... if strlen(`x') > 0

which is true for all your tests. So, the last test you made
overwrites the others.

As Joerg said, just using -length()- or -strlen()- to count the
characters is what you want.

Nick

On Sun, Apr 3, 2011 at 1:38 AM, Daniel Marcelino <dmsilva.br@gmail.com> wrote:

> Is there a way to identify how many digits a string var have? In the
> following example I have 18 , 14, and "missing" digits (counting "/".
> "-" and "."). So, I want to identify in var2 how many digits per line
> var1 has.
>
> gen str20 var1 = ""
> input
> "12.205.291/0001-33"
> "12.176.958/0001-17"
> "589.275.222-49"
> "409.011.140-49"
> "12.147.825/0001-12"
> "010.433.392-80"
> "07.752.894/0001-15"
> "."
> end
>
>
> I tried this loop, but it just returned me value "3" for all obs. What is wrong?
>
> foreach x of varlist var1 {
> generate byte var2 = 1 if strlen(`x')
> replace var2 = 2 if strlen(`x')
> replace var2 = 3 if strlen(`x')
> }
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/
```