Re: [R] Problems with numeric variable containing ? values

From: Spencer Graves <>
Date: Sat 13 Aug 2005 - 10:31:06 EST

          I'm very sorry, but I do not understand your question. If you are still waiting for an answer, may I suggest you PLEASE do read the posting guide! "". This may help you formulate your question so it will be easier for someone else to understand what you are asking and provide a useful reply.

          spencer graves wrote:

> Hello,
> I have a problem with the values for one column in a table.
> The variable represented in this column is numeric (I get TRUE
> when I ask is.numeric(x)). However, the values are listed
> ordinally and with row numbers as values, not with the ones
> that appear in the table. Some rows have an undefined value
> for this column, which appears as ? in the table (this is not
> an error). I wonder whether these undefined values are causing
> the problem.
> I need to extract a subset from this column with all rows not
> having '?' and then use the subset for a number if analysis.
> So far this is not possible since the subset does not have the
> real values, but the row numbers mentioned above. Any help?
> Thanks in advance,
> Francisco Torreira
> Francisco Torreira
> Spanish, Italian and Portuguese
> Univ. of Illinois at Urbana-Champaign
> 707 South Mathews Aven.
> 4031 FLB
> Urbana, IL, 61801
> ______________________________________________
> mailing list
> PLEASE do read the posting guide!

Spencer Graves, PhD
Senior Development Engineer
PDF Solutions, Inc.
333 West San Carlos Street Suite 700
San Jose, CA 95110, USA <>
Tel:  408-938-4420
Fax: 408-280-7915

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Received on Sat Aug 13 10:38:00 2005

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