[R] Subset

[Shane Carey]

Hi,

Lets say this was a dataframe where I had two columns

a <- c("<0.1", NA, 0.3, 5, "Nil")
b <- c("<0.1", 1, 0.3, 5, "Nil")

And I just want to remove the rows from the dataframe where there were NAs
in the b column, what is the syntax for doing that?

Thanks in advance

On Fri, Sep 22, 2017 at 5:04 PM, Shane Carey <careyshan at gmail.com> wrote:

> Super,
>
> Thanks
>
> On Fri, Sep 22, 2017 at 4:57 PM, Boris Steipe <boris.steipe at utoronto.ca>
> wrote:
>
>> > a <- c("<0.1", NA, 0.3, 5, "Nil")
>> > a
>> [1] "<0.1" NA     "0.3"  "5"    "Nil"
>>
>> > b <- as.numeric(a)
>> Warning message:
>> NAs introduced by coercion
>> > b
>> [1]  NA  NA 0.3 5.0  NA
>>
>> > b[! is.na(b)]
>> [1] 0.3 5.0
>>
>>
>> B.
>>
>>
>> > On Sep 22, 2017, at 11:48 AM, Shane Carey <careyshan at gmail.com> wrote:
>> >
>> > Hi,
>> >
>> > How do I extract just numbers from the following list:
>> >
>> > a=c("<0.1",NA,0.3,5,Nil)
>> >
>> > so I want to obtain: 0.3 and 5 from the above list
>> >
>> > Thanks
>> >
>> >
>> > --
>> > Le gach dea ghui,
>> > *Shane Carey*
>> > *GIS and Data Solutions Consultant*
>> >
>> >       [[alternative HTML version deleted]]
>> >
>> > ______________________________________________
>> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> > https://stat.ethz.ch/mailman/listinfo/r-help
>> > PLEASE do read the posting guide http://www.R-project.org/posti
>> ng-guide.html
>> > and provide commented, minimal, self-contained, reproducible code.
>>
>>
>
>
> --
> Le gach dea ghui,
> *Shane Carey*
> *GIS and Data Solutions Consultant*
>



-- 
Le gach dea ghui,
*Shane Carey*
*GIS and Data Solutions Consultant*

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