Hi Martin,
I got my initial question fully answered.
I do not have enough experience to to judge whether the behavior of R with
regard to Inf is excellent or better than Perl.
In my opinion, both Perl and R are great languages, designed for very
different applications.
So instead of me trying to
TS == Timur Shtatland [EMAIL PROTECTED]
on Fri, 12 Sep 2008 11:52:25 -0400 writes:
TS I am more used to getting an error if you try to take
TS the log of 0, like this (in Perl):
TS perl -le 'for my $num (1, 0, -1, -2) { print log $num;
TS }' 0 Can't take log of 0 at -e line
:03 PM
To: Greg Snow
Cc: r-help@r-project.org
Subject: Re: [R] making spearman correlation cor() call fail
with log(0) as input
You are right, Inf and -Inf are not considered errors in R,
they are accepted as input to Spearman's cor(), and so I will
have to check the input myself
PROTECTED]
Sent: Thursday, September 11, 2008 6:03 PM
To: Greg Snow
Cc: r-help@r-project.org
Subject: Re: [R] making spearman correlation cor() call fail
with log(0) as input
You are right, Inf and -Inf are not considered errors in R,
they are accepted as input to Spearman's cor
: [R] making spearman correlation cor() call fail with log(0) as input
Hi,
How can I make the cor(x, y, method=spearman) call to produce an
error when the input to it (x, y) produces an error? Here is a simple
example:
a - c(0, 1, 2)
b - c(100, 2, 4)
## error:
log(a)
[1] -Inf
Hi,
How can I make the cor(x, y, method=spearman) call to produce an
error when the input to it (x, y) produces an error? Here is a simple
example:
a - c(0, 1, 2)
b - c(100, 2, 4)
## error:
log(a)
[1] -Inf 0.000 0.6931472
## error, as expected:
cor(log(a), log(b), method=pearson)
Hi Timur,
try
cor(log(a+1), log(b+1), method=pearson)
HTH,
miltinho
brazil
On Wed, Sep 10, 2008 at 6:04 PM, Timur Shtatland [EMAIL PROTECTED]wrote:
Hi,
How can I make the cor(x, y, method=spearman) call to produce an
error when the input to it (x, y) produces an error? Here is a simple
Subject: [R] making spearman correlation cor() call fail with log(0) as input
Hi,
How can I make the cor(x, y, method=spearman) call to produce an
error when the input to it (x, y) produces an error? Here is a simple
example:
a - c(0, 1, 2)
b - c(100, 2, 4)
## error:
log(a)
[1] -Inf
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