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Bill,
As I wrote you before WriteVal converts from NUMBER or ARRAY
to STRING. That's why you can not use AddColumn() because
it accepts the array/number and NOT string. Only AddTextColumn accepts
strings.
In fact your formula can be simplified a lot. In *exploration* you don't
really need to use WriteVal at all.
WriteVal is required ONLY in Commentary and in Indicator Builder
(only if you want to use it in textual Title variable).
Here is the code :
Filter = 1;
DateSpan = EndValue(BarIndex()) - BeginValue(BarIndex());
Range = DateSpan ;
PerChange = (100*(EndValue(Close)-BeginValue(Close))/BeginValue(Close));
SD = (StDev(Close,Range));
SDPerCent = (StDev(((Close/Ref(Close,-1))-1)*100,Range)*((Range)/
(Range-1))^.5);
Title ="Percentage change of close is "
+ WriteVal( PerChange ) + "%, \nStandard Deviation of actual price change over
the period is " + WriteVal(EndValue(SD)) + "\nDaily Std Dev of %
Price Change over the period is " + WriteVal(EndValue(SDPerCent))
+ "\nMonthly Std Dev of % Price Change over the period is " +
WriteVal(EndValue(SDPerCent*(21)^.5));
/*NumColumns = 2;
Column0 = PerChange;
Column1 = SD;
Column0Name = "% Price";
Column1Name = "P StD";*/
AddColumn(7,"7");
AddColumn( SDPerCent, "SDPerCent" );
AddColumn(PerChange,"% Change");
AddColumn(SD,"SD");
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: <wbarack@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Thursday, February 20, 2003 5:33 PM
Subject: [amibroker] Re: AddColumn vs NumColumn & ColumnX=
> Tomasz,
>
> Once again, I have run into the limits of my knowledge.
>
> The following code is what precipitate my original question. The
> addcolumn example you gave below works just fine. However, If I try
> to do the variable PerChange, I run into an error message that I
> don't know how to fix. BTW, it works ok if I use
> the "NumColumns/ColumnX=" approach.
>
> So my first thought was that it was the array/scalar difference that
> was causing the problem. But apparently not.
>
> Can you help me with the difference as to why addcolumn isn't working
> here. Its something I haven't yet figured out.
>
> Thanks
>
> Bill
>
> --------------------
> Filter = 1;
>
> DateSpan = EndValue(BarIndex()) - BeginValue(BarIndex());
> Range = DateSpan ;
>
> PerChange = WriteVal(100*(EndValue(Close)-BeginValue
> (Close))/BeginValue(Close));
>
> SD = (StDev(Close,Range));
>
> SDPerCent = (StDev(((Close/Ref(Close,-1))-1)*100,Range)*((Range)/
> (Range-1))^.5);
>
> Title ="Percentage change of close is "
> + PerChange + "%, \nStandard Deviation of actual price change over
> the period is " + WriteVal(EndValue(SD)) + "\nDaily Std Dev of %
> Price Change over the period is " + WriteVal(EndValue(SDPerCent))
> + "\nMonthly Std Dev of % Price Change over the period is " +
> WriteVal(EndValue(SDPerCent*(21)^.5));
> /*NumColumns = 2;
> Column0 = PerChange;
> Column1 = SD;
> Column0Name = "% Price";
> Column1Name = "P StD";*/
> AddColumn(7,"7");
> AddColumn( SDPerCent, "SDPerCent" );
> AddColumn(PerChange,"% Change");
> AddColumn(SD,"SD");
>
> ---------------
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <amibroker@xxxx>
> wrote:
> > Bill,
> >
> > AddColumns works both with Number and arrays.
> > Filter=1;
> > AddColumn( 7, "Just 7" );
> >
> > (please do not use numcolumns variable if you use AddColumns
> function)
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> > ----- Original Message -----
> > From: <wbarack@xxxx>
> > To: <amibroker@xxxxxxxxxxxxxxx>
> > Sent: Thursday, February 20, 2003 3:58 PM
> > Subject: [amibroker] AddColumn vs NumColumn & ColumnX=
> >
> >
> > > In trying the different commnands above, it seems as though the
> > > AddColumn commnand only works with arrays. And if I calculate a
> > > scalar that I want to display in my Exploration, I need to use
> the
> > > NumColumns/ColumnX= approach.
> > >
> > > Is this a correct interpretation on my part.
> > >
> > > Thanks
> > >
> > > Bill
> > >
> > >
> > > Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> > > (Web page: http://groups.yahoo.com/group/amiquote/messages/)
> > >
> > > Check group FAQ at:
> http://groups.yahoo.com/group/amibroker/files/groupfaq.html
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> > >
>
>
> Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
> (Web page: http://groups.yahoo.com/group/amiquote/messages/)
>
> Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
Post AmiQuote-related messages ONLY to: amiquote@xxxxxxxxxxxxxxx
(Web page: http://groups.yahoo.com/group/amiquote/messages/)
Check group FAQ at: http://groups.yahoo.com/group/amibroker/files/groupfaq.html
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