Is there a function in R that could find the significant digit of a specific
number? Such as for 3.1415, return '5'?
Thanks in advance.
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On Wed, Dec 16, 2009 at 10:26 AM, Xiang Wu xiang@gmail.com wrote:
Is there a function in R that could find the significant digit of a
specific
number? Such as for 3.1415, return '5'?
Thanks in advance.
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On 12/16/2009 10:26 AM, Xiang Wu wrote:
Is there a function in R that could find the significant digit of a specific
number? Such as for 3.1415, return '5'?
Thanks in advance.
Not sure to understand what you mean, but you can have a look at ?signif
Something like this perhaps:
foo -
Try this:
f - function(x) length(gregexpr([[:digit:]], as.character(x))[[1]])
f(3.14)
[1] 3
f(3.1415)
[1] 5
f(3.14159265)
[1] 9
On Wed, Dec 16, 2009 at 1:39 PM, Xiang Wu xiang@gmail.com wrote:
Is there a function in R that could find the significant digit of a specific
number? Such as
On 16/12/2009 12:39 AM, Xiang Wu wrote:
Is there a function in R that could find the significant digit of a specific
number? Such as for 3.1415, return '5'?
The question may not have an unambiguous answer: I would say 1.00 and
1.0 have a different number of significant digits, but once
On 16/12/2009 8:48 AM, Xiang Wu wrote:
Yes, that's true. But what I need is the original precision of a
numeric. So to me, 1.00 and 1. are different.
In that case, they are not numbers, but strings: and you can probably
use nchar() to count characters, after stripping off any leading or
Is there a function in R that could find the significant digit of a specific
number? Such as for 3.1415, return '5'?
Thanks in advance.
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