how to apply relational operators on matrix elements?

2013 1 11
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i=[1 2 3 -4;5 -7 8 9;5 6 7 -7;3 4 -2 4]; i want to replace the elements of above matrix with the value greater than 4 by 4, and the matrix elements less than -4 by -4.

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James Tursa
James Tursa 2013-1-11
编辑：James Tursa 2013-1-11

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i(i>4) = 4;
i(i<-4) = -4;
or
i = min(max(i,-4),4);
But in the future avoid i as a variable name since that is what MATLAB uses for the imaginary number sqrt(-1).

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