comment on

This is slightly off-topic since the original poster was asking about fixed-point arithmetic, and not really significant digits, but....

It would be cool to have a perl library that would automatically apply the scientific "number of significant digits" rules.

my $n1=new Number::Scientific(5500,3); #5500 w/ 3 significatn digits
my $n2=new Number::Scientific(3.141592,7) # pi w/ 7 siginificant digit
+s
my $n3=$n1*$n2;
my $n4=$n2/$n1;
my $n5=$n1+$n2;
print "$n3 $n4 $n5\n";
[download]

would output 17300 0.000571 5500. Unfortunately I don't think any such beast exists.

In reply to Re: significant digits in computations by lhoward
in thread significant digits in computations by daemonchild

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


P is for Practical
	PerlMonks