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exclude null points in my calculation and series average

Posted on 2003-11-24
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Last Modified: 2010-04-05
Hi,

does anyone know how to exclude the null points from the calculation ?
I add some null points at the beginning of my chart (FastLine Series) but when I use

Chart1.Series[index].MaxYValue => I get 0 for my minimum Y value because of the null points I added... is there any way to exclude the null points ?

One more thing.... Is there any function to calculate the average of 1 series of my chart...??
 

thanks alot ^^
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Question by:allie910
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8 Comments
 
LVL 2

Accepted Solution

by:
odissey1 earned 60 total points
ID: 9814624
Hi allie910,

Actually 'Null' points differ only by color :). So if you check the color of the point, you will be able to omit those points in caclulations like

procedure TForm1.FormCreate(Sender: TObject);
var Av: double; //average
     i, k: integer;
begin
     Series1.FillSampleValues(10);
     Series1.AddNull('');
     Series1.ValueColor[0]:=clNone;

     Av:=0;
     Nnul:=0;
     for i:=0 to Series1.Count-1 do begin
       if Series1.ValueColor[i]=clNone then
       else begin
         Av:= Av+Series1.Yvalues[i];
         Inc(k) //count non-nil points

     end;
     
     //calculate average
     Av:=Av / k;

     Label1.Caption:=FloatToStr(Av);
end;

There is function to calculate average, but again - probably not in the standard Delphi package.
To check DblClick TChart -> in Chart Editor goto Series -> Add -> if you see Functions, go there.

Regards,
odissey1
P.S. 20 points for 2 questions???
0
 

Author Comment

by:allie910
ID: 9829201
Hi odissey1,

it's work just fine !! thank youuuu ^^

ps: sorry abt the points  that's my only points that i have ><'

thanks alot ;)
0
 
LVL 2

Expert Comment

by:odissey1
ID: 9835448
Hi allie910,

Thank you for points. Regarding TeeChart, I really recommend you to post questions on on news://www.berneda.com. You will get unswers faster.

Regards,
<odissey1>
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Expert Comment

by:allie109
ID: 9836227
Hi odissey1,

I tried to go to berneda... but i really cant find how I can post anyquestion there..... I can only browse the questions and the anwers
><'  

0
 
LVL 2

Expert Comment

by:odissey1
ID: 9839419
Hi allie910,

Like in any newsgroup. Make an account (set you nickname, and return address in Outlook or Netscape) -> compose message -> post.

Regards,
odissey1
0
 

Expert Comment

by:allie109
ID: 9847565
hi odissey1...

heheh sorry maybe this is sounds stupid, That's the problem ! I can't find the link where I can register os something like that.. I can only browse the question posted there
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LVL 2

Expert Comment

by:odissey1
ID: 9847938
Hi allie 910,

Ok, my guess you don't have IP address or e-mail account (like on library computers) on this computer. Say, if you use an Outlook Express, check if you can send e-mails using this Outlook Express. If you can - than you should be able to post messages on Network grous. If you unable to send e-mail - ask whoever around how to send e-mails from this computer.

Regards,
odissey1
0
 

Author Comment

by:allie910
ID: 9854855
odissey1,

ok than... thanks alot ;) I'll try =D

0

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