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?