Hi Petr,
Hi Jim,
many thanks for your help. Today I constructed a sample dataset and tested
your suggestions. Everything worked OK.
Then I took the code and testet on the original data. And - it worked OK
this morning also.
I went back to my script of Thuesday and ran it again. OK. Then I used my
script of Monday and ran it.. OK.
I have no idea what was wrong yesterday. To see that there is a problem
and not being able to replicate it a day later even if it did not work all
day before is very strange.
If the problem arises again, I will raise my hand.
Many thanks again for your help.
Kind regards
Georg
Von: PIKAL Petr <petr.pikal at precheza.cz>
An: "G.Maubach at weinwolf.de" <G.Maubach at weinwolf.de>,
"r-help at r-project.org" <r-help at r-project.org>,
Datum: 26.04.2016 11:11
Betreff: RE: [R] Missing Values in Logical Expressions
Hm
Based on Jim's data your construction gives me correct result.
Check_Kunde_2011
Check OK
1 9
So I presume that the problem lies in your data.
You should provide some sample of your data either by posting result of
str(yourdata)
or
dput(head(yourdata))
if you want some advice why with correct code you did not get appropriate
result.
Instead ifelse you can also use
Check_Kunde_2011 <- (is.na(Umsatz_2011)&(Kunde_2011==1))*1
to get desired 0/1 vector.
Cheers
Petr
-----Original Message-----
From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of
G.Maubach at weinwolf.de
Sent: Tuesday, April 26, 2016 10:10 AM
To: r-help at r-project.org
Subject: [R] Missing Values in Logical Expressions
Hi All,
I need to evaluate missing values in my data. I am able to filter these
values
and do simple statistics on it. But I do need new variables based on
variables
with missing values in my dataset:
Check_Kunde_2011 <- ifelse(is.na(Umsatz_2011) == TRUE & Kunde_2011 ==
1, 1, 0)
Check_Kunde_2011 <- factor(Check_Kunde_2011, levels = c(1,0), labels =
c("Check", "OK"))
The new variable is not correctly created. It contains no values:
table(Check_Kunde_2011)
< table of extent 0 >
I searched the web but could not find a solution.
How can I work with variables and missing values in logical expressions?
Where could I find something about this?
Kind regards
Georg
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