TChartSeries.AddArray
TChartSeries
function AddArray(Const Values: array of TChartValue): Integer; overload;
Unit
TeEngine
Description
The Series AddArray method may be used to add an array of data directly to the Series.
Example
Series3.Clear;
Series3.AddArray([ 1234, 2001, 4567.12 ] );
AddArray does not Clear the Series before adding points.
You can express points as constants or variables:
Series3.AddArray([ Table1Sales.AsFloat, 123, MyTotal ] );
Assigning an array directly to a Series valueList
You may assign an array directly to a Series ValueList without using the AddArray method to pass the values. To add an array of data to a Chart Series simply allocate the array to the Series.
This example uses the TChartValues definition in TeeChart's Teengine unit:
TChartValue=Double; { <-- default }
TChartValues=Array of TChartValue;
TChartValue may be modified to use Extended or Single as data type. See inside TeeDefs.inc file.
Example
\fi-360\li\tx\tx\txprocedure TDynArrays.Button1Click(Sender: TObject);
Var X,Y : Array of Double; // TChartValues
t : Integer;
Num : Integer;
begin
{ number of points here using an Editbox to set Array size}
Num:=StrToInt(Edit1.Text);
{ allocate our custom arrays }
SetLength(X,Num);
SetLength(Y,Num);
{ fill data in our custom arrays }
X[0]:=0;
Y[0]:=Random(10000);
for t:=1 to Num-1 do
begin
X[t]:=t;
Y[t]:=Y[t-1]+Random(101)-50;
end;
{ set our X array }
With Series1.XValues do
begin
Value:=TChartValues(X); { <-- the array }
Count:=Num; { <-- number of points }
Modified:=True; { <-- recalculate min and max }
end;
{ set our Y array }
With Series1.YValues do
begin
Value:=TChartValues(Y);
Count:=Num;
Modified:=True;
end;
Chart1.UndoZoom; { <-- remove zoom (optional) }
{ Show data }
Series1.Repaint;
end;
