Nothing to do with either -edit- or -if- or -&-.
The problem, as declared, is a type mismatch.
As -plannedsx- is float it can never be equal to an empty string.
-if plannedsx < .- would be one good way to test whether it was not
missing.
(I think Stata 8.2 had extended missing values .a ... .z already, so
!= .
and
< .
are not the same.) Tony Lachenbruch got a very useful publication in the
early STB out of explaining that < . was shorter than != . but with
extended missing values his short-cut really came into his own.
STB-9 ip2 . . . . . . . . . . . . . . . . . . . . . . . A keyboard
shortcut
. . . . . . . . . . . . . . . . . . . . . . . . . . P. A.
Lachenbruch
9/92 p.9; STB Reprints Vol 2, p.46 (no
commands)
keyboard shortcut to indicate nonmissing values
Also, check out the -missing()- function. It may have been called
-miss()- in Stata 8.2.
... if !missing(plannedsx)
is how you could do it in Stata 10.
Nick
[email protected]
b. water
Stata 8.2,
I wanted to do this:
edit if plannedsx!="" & modalit==""
i.e. i wanted to edit those where plannedsx are not missing but where
modality are missing
and received this message:
type mismatch
r(109);
The variables descriptions are:
storage display value
variable name type format label variable label
------------------------------------------------------------------------
-------
plannedsx float %9.0g planndsx
modalit byte %1.0f electrosx
Questions are:
1. How I can achieve what I wanted to do?
2. I would appreciate confirmation of this situation: I tried another
edit with if and & using another conditions and variables, these few
attempts returned the same type mismatch error r(109) - so I presumed
edit with if and & is not a legal syntax.
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