[Numpy-discussion] Applying formula to all in an array which hasvalue from previous

Nadav Horesh nadavh@visionsense....
Mon Mar 29 06:07:48 CDT 2010


The general guideline:

Suppose the function definition is:

def func(x,y):
    # x and y are scalars
    bla bla bla ...
    return z # a scalar

So,

import numpy as np

vecfun = np.vectorize(func)

vecfun.ufunc.accumulate(array((0,1,2,3,4,5,6,7,8,9))


   Nadav.


-----Original Message-----
From: numpy-discussion-bounces@scipy.org on behalf of Vishal Rana
Sent: Sun 28-Mar-10 21:19
To: Discussion of Numerical Python
Subject: [Numpy-discussion] Applying formula to all in an array which hasvalue from previous
 
Hi,

For a numpy array:

array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])

I do some calculation with 0, 1... and get a value = 2.5, now use this value
to do the repeat the same calculation with next element for example...
2.5, 2 and get a value = 3.1
3.1, 3 and get a value = 4.2
4.2, 4 and get a value = 5.1
....
....     and get a value = 8.5
8.5, 9 and get a value = 9.8

So I should be getting a new array like array([0, 2.5, 3.1, 4.2, 5.1, .....
8.5,9.8])

Is it where numpy or scipy can help?

Thanks
Vishal

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