explain semg=abs(x); in matlab

abs() function in MATLAB returns the absolute value of a complex number.

In the given statement, semg=abs(x); an input signal x is given as input and its absolute value is calculated and stored in semg.

This operation is generally used in signal processing and analysis to convert an input signal into its rectified form where negative values are removed and only positive values are retained.

For example,

main.m
x = [-3, 5, -7, 0, 6];
semg = abs(x);
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Here semg will be [3, 5, 7, 0, 6].

In summary, semg=abs(x); calculates the absolute value of an input signal x in MATLAB.