SciPy Recipes

Creating arrays with equally spaced values

There are two NumPy functions that create arrays with equally spaced elements: arange() and linspace(). The arange() function, which stands for array range, has an interface similar to the built-in Python range() function, except that the arguments can be floats, as shown in the following example:

x = np.arange(1.1, 1.9, 0.2)

This generates an array with elements between 1.1 and 1.9, with increments of 0.2, resulting in the array as follows:

array([ 1.1,  1.3,  1.5,  1.7])

Notice that the right endpoint is not included, that is, arange() uses the same convention as range(). As in the built-in Python range() function, the increment can be omitted, and is then assumed to be equal to 1, as demonstrated ...