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Re: How can I perform Matrix comparison?Can any one with kindness help
*To*: mathgroup at smc.vnet.net
*Subject*: [mg114811] Re: How can I perform Matrix comparison?Can any one with kindness help
*From*: Bob Hanlon <hanlonr at cox.net>
*Date*: Fri, 17 Dec 2010 23:47:57 -0500 (EST)
Presumably you want
m1 = Array[x, {2, 2}];
m2 = Array[y, {2, 2}];
And @@ Thread[Flatten /@ (m1 > m2)]
x[1, 1] > y[1, 1] && x[1, 2] > y[1, 2] && x[2, 1] > y[2, 1] &&
x[2, 2] > y[2, 2]
Alternatively,
And @@ (MapThread[Greater, {m1, m2}, 2] // Flatten)
x[1, 1] > y[1, 1] && x[1, 2] > y[1, 2] && x[2, 1] > y[2, 1] &&
x[2, 2] > y[2, 2]
In your specific case
a = {{2, 3}, {4, 5}};
b = {{1, 2}, {2, 3}};
And @@ Thread[Flatten /@ (a > b)]
True
And @@ (MapThread[Greater, {a, b}, 2] // Flatten)
True
Bob Hanlon
---- fmingu <fmingu at 163.com> wrote:
=============
I am using mathematica for practical purpose.
I wonder how can I perform Matrix comparison.
For instance:
a={{2,3},{4,5}}; b={{1,2},{2,3}};
a>b
I want the result is True.
But it seems that Mathematica can not recognize it.
I do not know how I can solve it? Are there any additional package to be added?
Can any one with kindness help me?
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