[R] how to used regular expression while reading file

[Sarah Goslee]

You could perhaps set the comment.char argument of read.table() to "@".

More generally, you can use scan() and process the lines within R.

On Tue, Mar 6, 2012 at 8:41 AM, sagarnikam123 <sagarnikam123 at gmail.com> wrote:
> i have file as in txt format
>
> @ATTRIBUTE f1996 REAL
> @ATTRIBUTE f1997 REAL
> @ATTRIBUTE f1998 REAL
> @ATTRIBUTE f1999 REAL
> @ATTRIBUTE f2000 REAL
> @ATTRIBUTE class {-1,1}
>
> @DATA
> 2.080750,1.099070,0.927763,1.029080,-0.130763,1.265460,-0.43
> 1.109460,0.786453,0.445560,-0.146323,-0.996316,0.555759,0.29
> -0.676530,1.693100,1.559250,1.559980,-0.982179,-1.358510,-1.
> 0.534396,1.677540,1.489030,0.778605,-0.183776,-1.116850,-1.4
> -1.018900,0.511080,0.755641,1.013820,0.529899,0.160440,-0.08
> -1.185370,-0.514473,-0.566634,1.224720,0.619244,-0.684713,-0
> 1.779050,0.423947,0.820696,2.525690,0.666921,0.661346,0.4253
> --------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> i want to parse only numbers not starting with @
> like
>
> 2.080750,1.099070,0.927763,1.029080,-0.130763,1.265460,-0.43
> 1.109460,0.786453,0.445560,-0.146323,-0.996316,0.555759,0.29
> -0.676530,1.693100,1.559250,1.559980,-0.982179,-1.358510,-1.
> 0.534396,1.677540,1.489030,0.778605,-0.183776,-1.116850,-1.4
> -1.018900,0.511080,0.755641,1.013820,0.529899,0.160440,-0.08
> -1.185370,-0.514473,-0.566634,1.224720,0.619244,-0.684713,-0
> 1.779050,0.423947,0.820696,2.525690,0.666921,0.661346,0.4253
>
> & putting numbers only  in array for each line
>
> how should i assess (read)  file
>
>

-- 
Sarah Goslee
http://www.functionaldiversity.org