 | Expressions like 3*a-1 generates temporary arrays |
| With in-place modifications of arrays, we can avoid temporary arrays
(to some extent)
b = a b *= 3 # or multiply(b, 3, b) b -= 1 # or subtract(b, 1, b)Note: a is changed, use b = a.copy() |
| In-place operations:
a *= 3.0 # multiply a's elements by 3 a -= 1.0 # subtract 1 from each element a /= 3.0 # divide each element by 3 a += 1.0 # add 1 to each element a **= 2.0 # square all elements |
| Assign values to all elements of an existing array:
a[:] = 3*c - 1 # insert values into a a = 3*c - 1 # let a refer to new array object |
