# Re: st: Creating a new numerical variable without mathematical operations

 From Jeph Herrin To statalist@hsphsun2.harvard.edu Subject Re: st: Creating a new numerical variable without mathematical operations Date Sat, 21 Oct 2006 10:14:59 -0400

```If you know the maximum digits for the -city- is k,

gen newid = province*(10^k)+city

will do it. So if -city- has at most four digits,

gen newid = province*10000+city.

hth,
Jeph

Ramani Gunatilaka wrote:
```
```Dear all,
I have two numerical variables, province and city: province has two
digits, city has at least 4.
eg. province= 11, city=  6227
I want to create a new numerical variable called 'newcity' which will
combine province and city like this:
116227
This is because I have to combine this data set with another, and the
unique identifying variable in the second data set has been
constructed in this way.
Can someone please tell me what command I may use?
Thanks so much,
Ramani
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