[R] Subset returning unexpected result

[jim holtman]

It would be useful to also post the 'str(int1901)' so that we could
see the structure of the dataframe.  Is Latitude by chance a 'factor'?
 You could also put a subset with the data by doing:

dput(int1901)

On Thu, Oct 15, 2009 at 11:39 AM, Steve Murray <smurray444 at hotmail.com> wrote:
>
> Dear all,
>
> I am attempting to subset a data frame based on a range of latitude values. I want to extract the values of 'interception' where latitude ranges between 50 and 60. I am doing this using the following code, yet it doesn't return the results I expected:
>
>
>> test <- subset(int1901, Latitude>=50 & Latitude <60, select=c(Latitude, Interception))
>
>
>> head(test)
>    Latitude Interception
> 2      6.25   0.04725863
> 3      6.75  67.02455139
> 82    50.75  51.74784088
> 83    51.25  57.04327774
> 84    51.75  51.51020432
> 85    52.25  53.30662537
>
>
> As you can see, latitude values outside the 50 to 60 range have been retained (e.g. the top two rows of 'test'). Why is this, and how can I ensure that I subset the data as initially intended?
>
> Many thanks for any help offered,
>
> Steve
>
>
>
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>



-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?