i need this equation matlab code any body help me.

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Wajahat Nawaz
Wajahat Nawaz 2018-1-15
评论： Image Analyst 2018-1-15

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Jan
Jan 2018-1-15
编辑：Jan 2018-1-15
gbar = sum(g(:)) / (M * N);
sigma2 = sum((g(:) - gbar) .^ 2) / (M * N - 1);
Looks straight forward. But what about:
sigma2 = var(g(:))

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