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From |
"Martin Weiss" <[email protected]> |

To |
<[email protected]> |

Subject |
st: RE: Problem with replace if - test condition works only for some values of test variable |

Date |
Fri, 24 Oct 2008 09:15:10 +0200 |

```
"Start with any dataset open": Not quite true. You must -set obs 101- to run
your code...
Also look at http://www.stata.com/support/faqs/data/float.html
HTH
Martin
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Naunihal Singh
Sent: Friday, October 24, 2008 12:32 AM
To: [email protected]
Subject: st: Problem with replace if - test condition works only for some
values of test variable
Please, indulge me. I'm sure I've overlooked something basic, but
replace if is working only for certain values of the test variable and
not for others.
Start with any dataset open
Here is the code fragment that replicates my problem:
ge y=.
generate x= (_n/100)-0.01 in 1/101
replace y=1 if x==0
replace y=1 if x==.01
replace y=1 if x==.25
replace y=1 if x==.26
replace y=1 if x==.5
replace y=1 if x==.51
replace y=1 if x==.75
replace y=1 if x==.76
replace y=1 if x==1
replace y=1 if x==.99
I'm able to make assignments to y only when x equals 0, .25, .5, .75,
and 1 but for no other value. This is the output I get:
. replace y=1 if x==.5
(1 real change made)
. replace y=1 if x==.51
(0 real changes made)
Why does this happen and how do I fix it? x is a float, so it should
have enough precision for the test condition. And if the test can
recognize .25 it should be able to recognize .26.
Thanks
N
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```

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