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Re: st: For loops, If Statements and Delimiters
From
Joerg Luedicke <[email protected]>
To
[email protected]
Subject
Re: st: For loops, If Statements and Delimiters
Date
Mon, 11 Feb 2013 15:01:48 -0500
Did you look at the -trace-? (-help trace-) Perhaps you could post an
excerpt of it.
Joerg
On Mon, Feb 11, 2013 at 2:54 PM, Ryan Stevens <[email protected]> wrote:
> I'm guessing that using Stata 12 should have no effect? Also, this is
> code I've extracted from a larger do file and changed a bit to make it
> more general. If you're getting it to work, maybe there's something
> going on with the rest of my do file that I'm unaware of. But I was
> hoping to see if anyone else had had similar issues with delimiters
> and for loops. Thanks both of you for responding so quickly.
>
> Ryan
>
> On Mon, Feb 11, 2013 at 2:48 PM, Joerg Luedicke
> <[email protected]> wrote:
>> FWIW, I cannot replicate this. Running the following in Stata 11.2:
>>
>> *------------------------------------------
>> clear
>> set obs 100
>>
>> forval i=1/3 {
>> gen var`i' = `i'
>> }
>>
>> # delimit ;
>> local j = 1;
>> foreach x of varlist var1-var3{;
>> forval i = 1/12{;
>> if(`j'<3){;
>> replace `x' = `x'[`i']-`x'[`j'] in `i';
>> local j = `j' + 1;
>> };
>> else{;
>> replace `x' = `x'[`i']-`x'[`j'] in `i';
>> local j = 3;
>> };
>> };
>> };
>>
>> *------------------------------------------
>>
>> works as expected:
>>
>> <snip>
>> - forval i = 1/12{
>> - if(`j'<3){
>> = if(1<3){
>> - replace `x' = `x'[`i']-`x'[`j'] in `i'
>> <snip>
>>
>> Joerg
>>
>> On Mon, Feb 11, 2013 at 2:41 PM, Nick Cox <[email protected]> wrote:
>>> Any suggestion? Mine would include not using ; as a delimiter. More
>>> positively, I would always put a space before each brace.
>>>
>>> My vague recollection is that there are some very obscure bugs that
>>> can bite with semi-colons, although a search did not turn up a precise
>>> post, but spaces before braces might be the territory.
>>>
>>> Nick
>>>
>>> On Mon, Feb 11, 2013 at 7:30 PM, Ryan Stevens <[email protected]> wrote:
>>>
>>>> I have been having an issue with using for loop and if statements
>>>> together with a semi-colon delimiter. The following is some example
>>>> code for the problem I've come across:
>>>>
>>>> # delimit ;
>>>> local j = 1;
>>>> foreach x of varlist var1-var3{;
>>>> forval i = 1/12{;
>>>> if(`j'<3){;
>>>> replace `x' = `x'[`i']-`x'[`j'] in `i';
>>>> local j = `j' + 1;
>>>> };
>>>> else{;
>>>> replace `x' = `x'[`i']-`x'[`j'] in `i';
>>>> local j = 3;
>>>> };
>>>> };
>>>> };
>>>>
>>>> Whenever I try running this I get an error on my if statement, where
>>>> Stata interprets "< 3" as a variable name. Any suggestions for loops
>>>> and if statements using delimiters would be greatly appreciated.
>>> *
>>> * For searches and help try:
>>> * http://www.stata.com/help.cgi?search
>>> * http://www.stata.com/support/faqs/resources/statalist-faq/
>>> * http://www.ats.ucla.edu/stat/stata/
>> *
>> * For searches and help try:
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>> * http://www.stata.com/support/faqs/resources/statalist-faq/
>> * http://www.ats.ucla.edu/stat/stata/
> *
> * For searches and help try:
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> * http://www.ats.ucla.edu/stat/stata/
*
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