What is "largest relative spacing"? 
Author Message
 What is "largest relative spacing"?

Hi everyone,

I'm manually translating some code in quadpack into C, and ran
into the following problem:  some of the subroutines I'm translating
call the function D1MACH() in slatec, which gives machine dependent
constants.  Some of the constants I can replace with those defined in
values.h, but this is one that I don't know what to do with:

D1MACH(4) = B**(1-T), the largest relative spacing.
Assume double precision numbers are represented in the T-digit,
base-B form
  sign(B**E)*( (X(1)/B) + ... + X(T)/B**T) )
where 0 .LE. X(I) .LT. B for I=1,...,T, 0.LT.X(1).

Can someone tell me what this is?  Better yet, how do I get this
constant in C?

Thanks in advance.

Andy I. Liaw                     Department of Statistics  

(409) 845-5757                   College Station, TX 77845-3143

Sun, 02 Nov 1997 03:00:00 GMT  
 [ 1 post ] 

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