Displaying 2 results from an estimated 2 matches for "caocheng".
2008 Sep 29
3
does there any function like sumif in excel?
I have a data.frame datas which have two columns A and B.
I want to filter column A by some values and to get a value list which
contain the value in B.
Best wishes!
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2008 Oct 15
0
R-help Digest, Vol 67, Issue 31
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[[elided Yahoo spam]]
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Message: 25
Date: Mon, 29 Sep 2008 07:20:38 -0700 (PDT)
From: John Kane <jrkrideau at yahoo.ca>
Subject: Re: [R] does there any function like sumif in excel?
To: R-help at r-project.org, caocheng?? <caocheng8230 at gmail.com>
Message-ID: <972822.20441.qm at web38408.mail.mud.yahoo.com>
Content-Type: text/plain; charset=utf-8
There are several ways to subset the dataframe
?select will give you one.
or mydata[mydata$A=value]<- mydata
then apply sum()
I do not think there...