[R] Help- extracting values

[David Winsemius]

On Apr 16, 2009, at 10:45 AM, Amit Patel wrote:

>
> I have csv files imported in r each with 2 columns and many many  
> rows. I have sorted the data in them but want to extract some values.
>
> The first column is an ID
> The second is a p-value ( now sorted in increasing order with NA's  
> last)
> I want to extract the rows with a p-value of less than 0.05)
>
> What commands would help
> the table is called AnovaSort with column headings MCI & p-value

"p-value" is a rather unlikely R name for a column since it is illegal  
in R. Using a "table" is also unlikely, so let's assume that once you  
have read it into a dataframe, that it's named p_value.

AnovaSort[AnovaSort$p_value < 0.05]

David Winsemius, MD
Heritage Laboratories
West Hartford, CT