Re: [R] replace NULL with NA in matrix

From: Katharine Mullen <kate_at_few.vu.nl>
Date: Thu, 17 Apr 2008 15:40:35 +0200 (CEST)

if your matrix is stored in a text file then  xx <- read.table("x", na.strings="NULL") where "x" is the name of the text file.

On Thu, 17 Apr 2008, Tim Smith wrote:

> Hi,
>
> I had a matrix with NULL values, which I wanted to replace with NA. Is there an efficient way to do this?
>
> Small sample input matrix:
> A B C D E
> 1 5222.18 6355.10 4392.68 2607.41 4524.09
> 2 NULL 257.33 NULL 161.51 119.44
> 3 NULL 274.80 305.28 443.27 NULL
> 4 1759.76 1556.45 1224.06 1558.73 1837.09
>
>
> Tim
>
>
>
>
>
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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 17 Apr 2008 - 14:18:15 GMT

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