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Hi GP, thank you for confirming what I suspected...Filtering low values
would be an option but in this case I think it would mean basically
filtering out the drawdowns, which I would definitely want to see. I guess I
will go back to displaying the actual equity... Thanks for the reply!
Steve
----- Original Message -----
From: "gp_sydney" <gp.investment@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, July 05, 2007 6:44 PM
Subject: [amibroker] Re: Linear / Logarithmic Equity Line
> Steve,
>
> You can't display zero or negative numbers on a log chart.
>
> I'd suggest you filter the equity array before displaying, setting
> some minimum value for all values that are less than that. You might
> need to use trial and error to pick a good minimum value that will
> display the rest of your data in a useful fashion. You won't then be
> able to see values below that minimum, but the rest of your data
> should make more sense.
>
> GP
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Steve Dugas" <sjdugas@xxx> wrote:
>>
>> Hi All,
>>
>> I wrote some code that plots an equity line with overlying
> regression line. It will plot correctly on linear or semi-log chart.
> Then I applied a little change so that the scale on the right starts
> at zero and displays % return rather than actual account equity. The
> line looks the same, only the scale is different. I like this better,
> except that the line looks very strange when I switch to the
> logaritmic chart. I *think* this is because the line starts at zero,
> and may go negative at times, and logarithms do not seem to work so
> well with these values. Just wondering if any math wizards out there
> might know of a workaround to correct this kind of problem? Thanks
> very much!
>>
>> Steve
>>
>
>
>
>
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