[R] Rearanging Data

[David Winsemius]

On Feb 8, 2012, at 9:48 PM, kevin123 wrote:

> Hi,
>
> This is only a small portion of the Data i am working on
> I want to make a subset of this data set( Data Set=Claims)
>
>  MemberID   ProviderID Vendor   PCP    Year  Specialty
> 1 42286978    8013252 172193 37796   Y1    Surgery
> 2 97903248    3316066 726296  5300    Y3    Internal
> 3  2759427    2997752 140343 91972    Y1   Internal
> 4 73570559    7053364 240043 70119   Y3   Laboratory
>
> I want to put all the rows containing Y1 into a subset. I tried this  
> but it
> does not work
>
> sub <- subset(Claims, Year=Y1)

You (as well , apparently, as Tal) don't seem to have learned that "="  
is an assignment function and the needed Comparison operator is "=="

?Comparison

Try instead:

sub <- subset(Claims, Year=="Y1")

-- 
David Winsemius, MD
West Hartford, CT