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# Function arg
Compute the argument of a complex value. If x = a + bi, the argument is computed as atan2(b, a).
arg(x)
For matrices, the function is evaluated element wise.
### Parameters
Parameter | Type | Description
--------- | ---- | -----------
`x` | Number | Complex | Array | Matrix | Boolean |
### Returns
Type | Description
---- | -----------
Number | Array | Matrix | res
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