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what matrix.plot meanings?

asked 2014-10-27 02:56:52 -0500

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when I run bolow,a graph appears,how to understand it?

matrix([[3,-1,1],[2,0,1],[1,-1,2]]).plot()

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answered 2014-10-27 05:11:09 -0500

Francis Clarke gravatar image

The lighter shades correspond to the larger entries of the matrix. In your example the black square are in positions (0, 1) and (2, 1), where the entries are -1, and the white square is in position (0, 0), where the entry is 3, which is the largest entry in the matrix. Typing

sage: M = matrix([[3,-1,1],[2,0,1],[1,-1,2]])
sage: M.plot?

will give more information.

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answered 2014-10-28 04:43:34 -0500

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thank you ver much!

I have understand by below sage: M = matrix([[20,10,2,-1,1,-2,-10],[20,10,2,-1,1,-2,-10],[20,10,2,-1,1,-2,-10],[20,10,2,-1,1,-2,-10]]) sage: M.plot()

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Asked: 2014-10-27 02:56:52 -0500

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Last updated: Oct 28 '14

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