On 09/10/2012 9:24 AM, Jessica Streicher wrote:
So..
real=factor(realLabels)
predicted=factor(predictedLabels)
fl<-unique(levels(real),levels(predicted))
real=factor(realLabels,fl)
predicted=factor(pl,fl)
table(real,predicted)
?
i kinda dont like it :/
Why make it so complicated? Don't you know the levels in advance? If
so, it's much simpler:
levels <- c(0,1)
x <- factor( c(1,1,1,0,0), levels=levels)
y <- factor( c(1,1,1,1,1), levels=levels)
table(x,y)
Even if you don't know them, the levels calculation doesn't need to work
on a factor, you could simply do
x<-c(1,1,1,0,0)
y<-c(1,1,1,1,1)
levels <- unique(c(x,y))
x <- factor( x, levels=levels)
y <- factor( y, levels=levels)
table(x,y)
Duncan Murdoch
On 09.10.2012, at 15:00, Jeff Newmiller wrote:
> Use factors?
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> Jessica Streicher <j.streic...@micromata.de> wrote:
>
>> I'm making tables for prediction results of classifiers (2 classes)
>> that show the usual numbers, true positives, false positives, etc
>>
>> I used the command
>>
>> table(predictedLabels,realLabels)
>>
>> to make those.
>>
>> I just had a case though ,where one of the label vectors had only one
>> class in it. This will result in only half a table.
>>
>> Compare:
>> x<-c(1,1,1,0,0)
>> y<-c(1,1,1,0,1)
>> table(x,y)
>>
>> to
>>
>> x<-c(1,1,1,0,0)
>> y<-c(1,1,1,1,1)
>> table(x,y)
>>
>> I want the second one to still have all 4 cases (second column all
>> zeros then).
>>
>> Any easy solutions?
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
