From: P Ehlers <ehlers_at_ucalgary.ca>

Date: Tue, 03 May 2011 20:06:03 -0600

*>
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*> Na.omit excludes the na's. This is what I want. The concern I have is why the row numbers do not match any of those shown in the examples above.
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R-help_at_r-project.org mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Thu 05 May 2011 - 06:25:03 GMT

Date: Tue, 03 May 2011 20:06:03 -0600

Kalicin, Sarah wrote:

\begin{quote}

I have a work around for this, but can someone explain
why the first example does not work properly?
I believed it worked in the previous version of R,
by selecting just the rows=200525 and omitting the na's.
\end{quote}

You can prove this statement by providing reproducible code that we can test.

Peter Ehlers

I just upgraded to 2.13. I am also concern with the row numbers being
different in the selections, should I be worried? FYI, I just selected
the first few rows for demonstration, please do not worry that the
number of rows shown are not equal. - Sarah

*>
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> With na.omit around the column, but it is showing other values in the F.WW column other than 200525, along with NA. I was hoping that this would omit all the NA's, and show all the rows that P$F.WW=200525. I believe it did with the previous version of R.

*> P[na.omit(P$F.WW)==200525, c(51, 52)]
**> F.WW R.WW
**> 45 200525 NA
**> 53 NA NA
**> 61 200534 200534
**> 63 200608 200608
**> 66 200522 200541
**> 80 NA NA
**> 150 200521 200516
**> 231 200530 200530
**>
**> No na.omit, the F.WW=200525 seems to work, but lots of NA included. This is what is expected!! The row numbers are not the same as the above example, except the first row.
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>> P[P$F.WW==200525, c(51, 52)]

> F.WW R.WW

> 45 200525 NA> NA NA NA> NA.1 NA NA> NA.2 NA NA> NA.3 NA NA> 57 200525 200526> 65 200525 NA> 67 200525 NA> 70 200525 200525> NA.4 NA NA> NA.5 NA NA> 86 200525 NA

>> na.omit(P[P$F.WW==200525, c(51, 52)])

> F.WW R.WW

> 57 200525 200526

> 70 200525 200525> 161 200525 200525> 245 200525 200525> 246 200525 200525> 247 200525 200526> 256 200525 200525> 266 200525 200525> 269 200525 200525> 271 200525 200526> 276 200525 200526> 278 200525 200526>> [[alternative HTML version deleted]]

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