Tirthankar and Scott, Thank you very much for your help!
I know how to do now. -egen- is a very useful command!
----- Original Message -----
From: Scott Merryman <[email protected]>
To: [email protected]
Subject: Re: st: how to count the number of certain characters in a string variable?
Date: 2009-7-28 22:18:29
I assume by your example you mean "aa" and "a". One way would be
-gen y = regexm(x, "aa") + regexm(x, "a")-
To relace:
-gen x2 = regexr(x,"aa" ,"zz")-
-replace x2 = regexr(x2,"a" ,"z")-
Scott
2009/7/28 <[email protected]>:
> Dear statalists,
>
> I have a string variable X as follows:
>
> X 燳
>
> aabb ?
>
> bbdd ?
>
> cdba ?
>
> dxbaa ?
>
> dxaa ?
>
> I want to generate a variable Y to stand for the number of certain characters,
> such as "aa" and replace these characters with other characters, such as "zz".
>
>
> How to do it ?
>
> Thank you !
>
> Sincerely,
>
> From Rose.
>
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