How to convert Double type to Numeric type?

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jingjign chen
jingjign chen 2018-2-3
编辑： jingjign chen 2018-2-5
the function B=colspace(A) requires the input matrix A can be symbolic or numeric. But now I have a matrix of double type.Though I can convert double to symbolic,but the function 'sym' is too much time-consuming. So,how can I convert the double type into numeric type ? thanks.

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