/NumPy 1.13

# numpy.polynomial.legendre.legadd

`numpy.polynomial.legendre.legadd(c1, c2)` [source]

Add one Legendre series to another.

Returns the sum of two Legendre series `c1` + `c2`. The arguments are sequences of coefficients ordered from lowest order term to highest, i.e., [1,2,3] represents the series `P_0 + 2*P_1 + 3*P_2`.

Parameters: c1, c2 : array_like 1-D arrays of Legendre series coefficients ordered from low to high. out : ndarray Array representing the Legendre series of their sum.

#### Notes

Unlike multiplication, division, etc., the sum of two Legendre series is a Legendre series (without having to “reproject” the result onto the basis set) so addition, just like that of “standard” polynomials, is simply “component-wise.”

#### Examples

```>>> from numpy.polynomial import legendre as L
>>> c1 = (1,2,3)
>>> c2 = (3,2,1)
>>> L.legadd(c1,c2)
array([ 4.,  4.,  4.])
```

© 2008–2017 NumPy Developers
Licensed under the NumPy License.
https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.polynomial.legendre.legadd.html