SciPy Recipes

Doing array operations

ufunc functions can also admit more than one argument. The most common example of this is array operations. For example, we can add two arrays with the following code:

x = np.array([1.2, -0.23, 3.4])y = np.array([2.4, -1.7, -5.4])z = x + y

This code uses the + operator to compute the component-wise sum, or vector sum, of the two one-dimensional arrays x and y, and stores the result in array z.

The reader may be somewhat surprised that we are discussing a binary operator here, since the topic of this section is ufunc functions, which are functions. Behind the scenes, NumPy calls ufunc to perform the binary operation. For example, the preceding computation can be done with the code z=np.add(x,y). NumPy uses the standard ...