R help - Mar 2010 - Data.frame issue (pls help)

Hi: 
I want to obtain a particular value from a data.frame. Following is my
dataframe:
> Quotes
                  		BID      		ASK
Name
CT2 GOVT     		99.92969  	99.9375		CT2
TUM0 COMDTY 	108.53125 	108.5469	TUM0
CT5 GOVT    		100.10156 	100.1094	GT5
FVM0 COMDTY 	115.56250 	115.5703	FVM0
TYM0 COMDTY 	116.93750 	116.9531	TYM0

If I try to run: QuoteTUM0BID = Quotes[Quotes$Name %in% "TUM0",
"BID"]
and print QuoteTUM0BID, I get 108.5312, instead of 108.53125 as an
answer. Please let me know why is it ignoring the last digit. 


Additional Information. 
If I run QuoteBID = Quotes[, "BID"], I get the whole array in which
TUM0
BID is 108.53125 (a correct number).


Thanks in advance...
Rgds,
Brijesh



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Hi,

I cannot really test since your dataframe is completely distorted, but 
what happens if you try: format(QuoteBID, nsmall=5)?
I think it's just a matter of printing, which uses the number of digits 
from options(digits=).

See: ?options, ?format, etc.

But I'm not an expert and cannot really test for this.
HTH
Ivan

Le 3/8/2010 14:15, GULATI, BRIJESH (Global Markets FF&O NY) a ?crit
:
> Hi:
> I want to obtain a particular value from a data.frame. Following is my
> dataframe:
>
>    
>> Quotes
>>      
>                    		BID      		ASK
> Name
> CT2 GOVT     		99.92969  	99.9375		CT2
> TUM0 COMDTY 	108.53125 	108.5469	TUM0
> CT5 GOVT    		100.10156 	100.1094	GT5
> FVM0 COMDTY 	115.56250 	115.5703	FVM0
> TYM0 COMDTY 	116.93750 	116.9531	TYM0
>
> If I try to run: QuoteTUM0BID = Quotes[Quotes$Name %in% "TUM0",
"BID"]
> and print QuoteTUM0BID, I get 108.5312, instead of 108.53125 as an
> answer. Please let me know why is it ignoring the last digit.
>
>
> Additional Information.
> If I run QuoteBID = Quotes[, "BID"], I get the whole array in
which TUM0
> BID is 108.53125 (a correct number).
>
>
> Thanks in advance...
> Rgds,
> Brijesh
>
>
>
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>
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>
>    
-- 
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. S?ugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra at uni-hamburg.de

**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php

> Hi: 
> 	I want to add a constant to an existing col of the data.frame. I
> have the following dataset:
> 
> 
> structure(list(x = c(1, 1, 1, 1, 1), y = c(1, 1, 1, 1, 1)), .Names >
c("x",
> "y"), row.names = c(NA, 5L), class = "data.frame")
> 
> 
> I want to add a constant to col 1 and col 2 to get the following
> data.frame 
> 
> structure(list(x = c(2, 2, 2, 2, 2), y = c(3, 3, 3, 3, 3)), .Names >
c("x",
> "y"), row.names = c(NA, 5L), class = "data.frame")
> 
> 
> Thanks, 
> Brijesh
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