[R] aplpy recursive function on a list

[Berend Hasselman]

On 25-01-2012, at 21:00, Berend Hasselman wrote:

> 
> On 25-01-2012, at 19:09, patzoul wrote:
> 
>> I have 2 series of data a,b and I would like to calculate a new series which
>> is z[t] = z[t-1]*a[t] + b[t] , z[1] = b[1].
>> How can I do that without using a loop?
> 
> ?filter

Oops. filter only works with a and b both constants.

Berend