nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/linalg/api/blas/impl/BaseLevel1.java
@Override
    public int iamax(IComplexNDArray arr) {
        if (arr.data().dataType() == DataBuffer.Type.DOUBLE)
            return izamax(arr.length(), arr, BlasBufferUtil.getBlasStride(arr));
        return icamax(arr.length(), arr, BlasBufferUtil.getBlasStride(arr));
    }
@Override
    public int iamax(IComplexNDArray arr) {
        if (arr.data().dataType() == DataBuffer.Type.DOUBLE)
            return izamax(arr.length(), arr, BlasBufferUtil.getBlasStride(arr));
        return icamax(arr.length(), arr, BlasBufferUtil.getBlasStride(arr));
    }
finds the element of a vector that has the largest absolute value.

@param arr
@return