Rank: Advanced Member
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Joined: 8/11/2005(UTC)
Posts: 104
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Hi,
If I include the last two terms in the Butterworth equation
i.e. { + coef2*Butter[1] + coef3*Butter[2]
; }
as (coef2*PREV)
I
get an error “overflow in Multi[]
Function “
Is there anyway to overcome this problem
Hoping hat you can oblige
Derek
Code:
{ 2 Pole Butterworth Filter }
Data:=((H+L)/2);
Period:=Input("Period",5,175,175);
a1:=Exp(-1.414*3.14159/Period);
b1:=2*a1*Cos(1.414*180/Period);
coef2:=b1;
coef3:=-a1*a1;
coef1:=(1-b1+a1*a1)/4;
Butter:= coef1*(Data+2*Ref(Data,-1)+Ref(Data,-2))
{+ coef2*Butter[1] + coef3*Butter[2];};
If(Cum(1)<3 , Butter=Data,butter);
Butter;
{
………………………………………………….
Original code
Input: Price((H+L)/2), Period(15);
a1=expvalue(-1.414*3.14159/Period);
b1=2*a1*Cosine(1.414*180/Period);
coef2=b1;
coef3=-a1*a1;
coef1=(1-b1+a1*a1)/4;
Butter = coef1*(Price+2*Price[1]+Price[2])+
coef2*Butter[1] + coef3*Butter[2];
If CurrentBar<3 then Butter=Price;
Plot1(Butter,"Butter");
…………………………………………….
}
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Rank: Advanced Member
Groups: Registered, Registered Users, Subscribers, Unverified Users
Joined: 10/28/2004(UTC)
Posts: 3,111
Location: Perth, Western Australia
Was thanked: 16 time(s) in 16 post(s)
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This is why I have the MDK! Have you tried: Code:
Butter:= coef1*(Data+2*Ref(Data,-1)+Ref(Data,-2)) + coef2*PREV + coef3*Ref(PREV,-1);
It will be VERY slow!
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Rank: Advanced Member
Groups ready for retrieval: Registered, Registered Users, Subscribers, Unverified Users
Joined: 8/11/2005(UTC)
Posts: 104
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Hi Wabbit,
The speed is quite reasonable!
Thank you again ..that is great.
Derek
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