R-Help,

 

I am trying to reduce at data set to rows where a specified value occurs
in a specified value.  Below is a screen capture of Rgui:

 

> nsmalldata <-read.csv("c:\\DATA\\UNITY\\\PASS0_DOWNFADE\\nsmall.csv")

> nsmalldata

   BOARDNUMBER SESSIONID MATRIXID ARRAYPOINT Temperature   PS1   PS2
PS13 PS14 PS15

1        LB0DC      3043  7757513          1       -9999 -9999 -9999
3.6    5   -5

2        LB0DC      3043  7757515          1       -9999 -9999 -9999
3.6    5   -5

3        LB0DC      3043  7757517          1       -9999 -9999 -9999
3.6    5   -5

4        LB0DC      3043  7757520          1       -9999 -9999 -9999
3.6    5   -5

5        LB0DC      3043  7757522          1       -9999 -9999 -9999
3.6    5   -5

6        LB0DC      3043  7757524          1       -9999 -9999 -9999
3.6    5   -5

7        LB0DC      3043  7757526          1       -9999 -9999 -9999
3.6    5   -5

8        LB0DC      3043  7757528          1       -9999 -9999 -9999
3.6    5   -5

9        LB0DC      3043  7757531          1       -9999 -9999 -9999
3.6    5   -5

10       LB0DC      3043  7757533          1       -9999 -9999 -9999
3.6    5   -5

11       LB0DC      3043  7757535          1       -9999 -9999 -9999
3.6    5   -5

12       LB0DC      3043  7757537          1       -9999 -9999 -9999
3.6    5   -5

13       LB0DC      3043  7757540          1       -9999 -9999 -9999
3.6    5   -5

14       LB0DC      3043  7757542          1       -9999 -9999 -9999
3.6    5   -5

15       LB0DC      3043  7757544          1       -9999 -9999 -9999
3.6    5   -5

16       LB0DC      3043  7757547          1       -9999 -9999 -9999
3.6    5   -5

17       LB0DC      3043  7757549          1       -9999 -9999 -9999
3.6    5   -5

18       LB0DC      3043  7757551          1       -9999 -9999 -9999
3.6    5   -5

19       LB0DC      3043  7757554          1       -9999 -9999 -9999
3.6    5   -5

20       LB0DC      3043  7757556          1       -9999 -9999 -9999
3.6    5   -5

> 

 

For Example

I would like to reduce nsmalldata to only the rows where
SESSIONID==7757513

I have spent quite a bit of time with R manuals and still have not
gotten there, can you help me?

 

Thanks in advance.

 

Regards,

Bill

 

Bill Hunsicker

RF Micro Devices

7625 Thorndike Road

Greensboro, NC  27409

336-678-5260(W)

610-579-9985(M)

 


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