Ronny Mandal wrote:
> Assume you have a mathematical function, e.g. f(x) = x + 4
>
> To calculate all the values from 1 to n, a loop is one alternative.
>
Numeric and friends (numarray,numpy) have something like numarray.arange
- they return arrays similar to the lists returned by standard libs
range function. I would recommend using the built-in array operations as
much as possible - in most cases they are much faster than looping, and
your code remains simpler.
> But to make this function work with vectors instead i.e
> f(x_vector) = result_vector,
> how should the function then be implemented?
>
In most numeric libraries, vectors and scalars can be added etc.
For the simple f(x) case you can use just the simplest approach:
def f(x):
return x+4
and call this with scalar and vector args.
f_pi = f(3.14159265)
f_1to200 = f(numarray.arange(1,200))
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