Duplicate: Referencing previous value of same array

[whitpeter]

Hello,
I'm trying to set an array where values (except for the i = 0 value) are dependant on the previous value in the array. So something like the following:

test = IIF(barindex != 0, IIF(ref(test,-1) == 0, 1, 0), 0);

I have been able to write a loop solution to define the array but I was wondering if anyone has an array based solution that mimics what I'm trying to say in the above expression.

Thank you!

Whit

[Tomasz]

This has been already discussed in:

Duplicate - Self-referencing, was: Programming previous value of a "value"

Hi! I have used Metastock before, and Metastock has a function called PREV. It allows You to create self-referencing formulas. Example: cpc:=If(pds<>Ref(pds,-1),0,dc+PREV); In this formula PREV:s value is the previous value of cpc. Is it possible to do the same thing in Amibroker? Appreciate all help! /Leif

Doubt when using self referencing

Hi Guys, Just bought Amibroker and getting the hang of AFL. I have a doubt on when you self reference a variable. For Ex: a = (ref(a,-1)) + 2 Generally this would result in an error unless I initialize a[0] and then use for loop for the rest of the array. Is there a work around to this. For Ex. In tradingview they have a simple function called nz() which would erase all null values.