[R] Exponent of sqr symmetric matrix

[zhiji19]

Dear R experts,

I really have difficulty when I try to deal with this question.

suppose X is a square symmetric matrix. The exponent of X is defined by the
matrix limit as following:
exp(X) = lim (I + X/n)^n,  note: the limit is from n to infinite.

How can I write R function for the above?

Thank you very much

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