[R] range and intersection

[David Winsemius]

On Mar 13, 2010, at 10:14 PM, Adrian Johnson wrote:

> Hi:
>
> I have a two large files (over 300K lines).
>
> file 1:
>
> Name    X
> UK       199
> UK       230
> UK       139
> ......
> UAE    194
> UAE     94
>
>
>
>
> File 2:
>
> Name   X    Y
> UK    140   180
> UK    195    240
> UK    304    340
> ....
>

I haven't figured out what you are expecting. Cannot tell whether you  
want to make this test a) all file1$X within values of "Name" or b)  
all file1$X across all values, or c) to pick a specific line in file1,  
or d) file1$X  on a line by line basis in file2. This implements that  
last of those three and has the downside of generating warnings.

 > file1[file2[, "X"] < file1[, "X"] & file1[, "X"] < file2[,"Y"], ]
   Name   X
2   UK 230
Warning messages:
1: In file2[, "X"] < file1[, "X"] :
   longer object length is not a multiple of shorter object length
2: In file1[, "X"] < file2[, "Y"] :
   longer object length is not a multiple of shorter object length

>
> I want to select X of File 1 and search if it falls in range of X and
> Y of File 2 and Print only those lines of File 1 that are in range of
> File 2 X and Y
>
>
> How can it be done it in R.
>
> thanks
> Adrian
>
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David Winsemius, MD
West Hartford, CT