# [SciPy-User] Interpolate a list of numbers?

Robert Kern robert.kern@gmail....
Tue Sep 13 18:43:20 CDT 2011

```On Tue, Sep 13, 2011 at 18:22, Anthony Palomba <apalomba@austin.rr.com> wrote:
> Just to be super clear...
>
> Instead of using a range, a la np.linspace, I want to be able
> to interpolate a list of paired tuples,
>
> like [x1, y1, x2, y2, x3, y3, x4, y4]
>
> Any ideas?

I am going to assume you meant [(x1,y1), (x2,y2), ...].

def interpmap(c, points):
x, y = np.array(points).transpose()
f = interpolate.interp1d(x, y)
return f(c)

> On Tue, Sep 13, 2011 at 5:57 PM, Anthony Palomba <apalomba@austin.rr.com>
> wrote:
>>
>> Hey scipyers,
>>
>> I have an interpolation question...
>>
>> I have a function that I am currently using to do interpolation.
>>
>> def interpmap(c, x1, y1, x2, y2, base = None):
>>     range1 = np.linspace(x1, y1, 20)
>>     range2 = np.linspace(x2, y2, 20)
>>     f = interpolate.interp1d(range1, range2)
>>     return f(c)
>>
>> I takes range (x1 <= y1) and maps it on to (x2 <= y2).
>>
>> I would like to be able to specify a list of points as
>> the range. Is it possible to create a linspace from a list?
>>
>>
>>
>> Thanks,
>> Anthony
>>
>
>
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>

--
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
-- Umberto Eco
```