[R] Building a random walk vector

From: Matthew Wilson <matt_at_overlook.homelinux.net>
Date: Fri 04 Aug 2006 - 11:17:15 EST


I'm studying R in my free time. I want to build a vector where each element is equal to the element before it in the sequence plus some random tweak.

In python, I would write:

vec = [100] * 50 # make a 50-element list with each element set to 100 from random import randint
for i, v in enumerate(vec):

    if i is not 0: # if we're not on the first element

        vec[i] = vec[i-1] + randint(-2, 2)

I suspect R has some fancier way of doing this. How to?

TIA

-- 
A better way of running series of SAS programs:
http://overlook.homelinux.net/wilsonwiki/SasAndMakefiles

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Received on Fri Aug 04 11:25:44 2006

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