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Re^5: [OT] Statistics question.

by roboticus (Chancellor)
on Jan 30, 2013 at 23:36 UTC ( #1016178=note: print w/ replies, xml ) Need Help??


in reply to Re^4: [OT] Statistics question.
in thread [OT] Statistics question.

Bill:

I was getting ginormous values like 1.6...E30 and the like. Since I'm using exp(...) to generate them, I never have nice integers to play with, so I doubt they form perfect squares or such. But I'm not current on things like that, so I could be wrong.

...roboticus

When your only tool is a hammer, all problems look like your thumb.


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Re^6: [OT] Statistics question.
by BillKSmith (Deacon) on Jan 31, 2013 at 21:23 UTC

    It sounds like my method will not help you in this case. I have used it in solving triangles. I want $b=sqrt($c**2-$a**2). The mathematically equivalent statement $b=sqrt(($c+$a)*($c-$a)) allocates almost twice as many bits for the subtraction. Not knowing this simple trick added weeks of effort to my first real FORTRAN program.

    Bill

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