Add slice() and size() functions for Matrix

[datang1992]

We could add slice() and size() functions for Matrix. Where

slice(Matrix M, Integer a, Integer b, Integer c, Integer d) = M(a:b, c:d) (as it is in Matlab).

and

size(Matrix M, 1) = number of rows in M; size(Matrix M, 2) = number of columns in M;

(Or we could also call the two size functions as numOfRow() and numOfColumn()).

[jxwuyi]

Probably submat() will be better I think.

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ÔÚ 2014Äê7ÔÂ31ÈÕ£¬4:04£¬Da Tang notifications@github.com дµÀ£º

We could add slice() and size() functions for Matrix. Where

slice(Matrix M, Integer a, Integer b, Integer c, Integer d) = M(a:b, c:d) (as it is in Matlab).

and

size(Matrix M, 1) = number of rows in M; size(Matrix M, 2) = number of columns in M;

(Or we could also call the two size functions as numOfRow() and numOfColumn()).

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[lileicc]

question, can you define it within blog (using fixed function)?

[datang1992]

@lileicc Yes, we could define these functions using fixed functions. If you approve, I will add them.