Data manipulation
Hi IOANNA,
I got the data but it is missing a value in Count (length 22 vs length 23 in the other two variable so I stuck in an extra 1. I hope this is correct.
There also was an attachement called winmail.dat that appears to be some kind of MicroSoft Mail note that is pure gibberish to me--I'm on a Linux box.
For some reason in neither posting does your example of the output you want come through. Are you posting in html ? R-help strips any html so is there a change it stripped out a table?
If i do this
table(Class, X)
X
Class 0.1 0.2 0.3
1 4 3 0
2 7 0 0
3 1 4 4
I see that you have two combinations of Class and X with no entries. Is this what you wanted to show in W? If so, it is not immediately apparent how to go about this.
John Kane
Kingston ON Canada
-----Original Message----- From: ii54250 at msn.com Sent: Fri, 15 Mar 2013 13:11:48 +0000 To: jrkrideau at inbox.com, r-help at r-project.org Subject: RE: [R] Data manipulation Hello John, I thought I attached the file. So here we go: Class=c(1,1,1,1, 1,1,1,2, 2,2,2,2, 2,2,3,3, 3,3,3,3, 3,3,3) X=c(0.1,0.1,0.1, 0.1,0.2, 0.2,0.2, 0.1,0.1, 0.1,0.1,0.1,0.1,0.1,0.1,0.2,0.2,0.2,0.2,0.3,0.3,0.3, 0.3) Count=c(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1) by1<-factor(Class) by2<-factor(X) W<-aggregate(x=Count,by=list(by1,by2),FUN="sum") However, what I want is a table that also include lines for the Group.1 and Group.2 values for which there are no records. In other words something like this: Thanks again. I hope its clearer now. Ioanna -----Original Message----- From: John Kane [mailto:jrkrideau at inbox.com] Sent: 15 March 2013 12:51 To: IOANNA; r-help at r-project.org Subject: RE: [R] Data manipulation What zero values? And are they acutall zeros or are the NA's, that is, missing values? The code looks okay but without some sample data it is difficult to know exactly what you are doing. The easiest way to supply data is to use the dput() function. Example with your file named "testfile": dput(testfile) Then copy the output and paste into your email. For large data sets, you can just supply a representative sample. Usually, dput(head(testfile, 100)) will be sufficient. http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducibl e-example Please supply some sample data. John Kane Kingston ON Canada
-----Original Message-----
From: ii54250 at msn.com
Sent: Fri, 15 Mar 2013 12:40:54 +0000
To: r-help at r-project.org
Subject: [R] Data manipulation
Hello all,
I would appreciate your thoughts on a seemingly simple problem. I have
a database, where each row represent a single record. I want to
aggregate this database so I use the aggregate command :
D<-read.csv("C:\\Users\\test.csv")
attach(D)
by1<-factor(Class)
by2<-factor(X)
W<-aggregate(x=Count,by=list(by1,by2),FUN="sum")
The results I get following the form:
W
Group.1 Group.2 x 1 1 0.1 4 2 2 0.1 7 3 3 0.1 1 4 1 0.2 3 5 3 0.2 4 6 3 0.3 4 However, what I really want is an aggregation which includes the zero values, i.e.:
W
Group.1 Group.2 x
1 1 0.1 4
2 2 0.1 7
3 3 0.1 1
4 1 0.2 3
2 0.2 0
5 3 0.2 4
1 0.3 0
2 0.3 0
6 3 0.3 4
How can I achieve what I want?
Best regards,
Ioanna
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