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DD_QD (MuPAT) >> DD_QD (MuPAT) > DD: 16 bytes decimal arithmetics > ddip

ddip

inner product of DD vectors

Syntax

z = ddip(x,y)

Parameters

x,y

2 column vectors of real DD numbers, of same lengths.

z

DD number = x'*y

Examples

x = ddrand(10,1);
y = ddrand(10,1);
z = ddip(x,y)
z == x' * y
sqrt(ddip(x,x)) == norm(x,2)
--> z = ddip(x,y)
 z  = 
   2.407167425747500363001462552151E0

--> z == x' * y
 ans  =
  T

--> sqrt(ddip(x,x)) == norm(x,2)
 ans  =
  T

See Also

Authors

Copyright (C) 2011 - Tsubasa Saito

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