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Fastest way to check inequality

• To: mathgroup at smc.vnet.net
• Subject: [mg91361] Fastest way to check inequality
• From: Ravi Balasubramanian <bravi at cs.washington.edu>
• Date: Mon, 18 Aug 2008 03:36:52 -0400 (EDT)

Hello Math-groupers,

I need to test the inequality

A . x <= 0, where

x is a three-D vector.
A is a 35000x3 matrix.

I need to test this for 20000 points.

So I set this up as follows:

A = RandomReal[{0,1},{35000,3}];

x = RandomReal[{0,1},{20000,3}];

(And @@ NonPositive[constrMat . # ]) & /@ x;

Is this the fastest way?

Ravi
The University of Washington
Seattle, WA