Steema Central

Posted: **Tue Jan 23, 2007 8:31 pm**

Hello,

On certain dates I measure a value.

I have 5 dates for my x axis. Every date has its value on the left axis.
Everything is displayed fine but the intervals between the dates are calculated and then displayed. I want them to be regular. That is, if the interval between the dates in days is 10, 20, 30 and 40 I want the visual distance equally devided in parts of 25.

How can I do this?

I use Tchart V5 pro.

Posted: **Wed Jan 24, 2007 8:45 am**

Hi Rob,

I'm not sure about what you are trying to achieve here but have you tried setting axes increment? For example:

Code: Select all

  Chart1.Axes.Bottom.Increment:=25;

Posted: **Wed Jan 24, 2007 8:27 pm**

Hello Narcis,

I'm sorry, I did not explain it properly. The intervals are just examples, the real intervals are random. If I have 10 dates I want all 10 of them evenly ditributed on the graph, not representing their place on a timeline. Furthermore, the bottom axis displays random dates (every first) instead of the real dates (the proper dates are in the Data)

Some more details: the graph is a horizontal line, in Series Datasource Label has TotalErrors (representing the counting), the X axis has Date, the Y axis had TotalErrors. See images

Posted: **Thu Jan 25, 2007 9:33 am**

Hi Rob,

Thanks for the information.

To achieve what you request you should populate your series like in the code snippet below. Here points are evenly spaced because only Y values are added to the series, X values are automatically added and range from 0 to MyLine.Count-1. That's why points are evenly spaced. To have dates displayed in the bottom axis labels we just need to add them as labels for each point, instead of X values, and set series marks to display Y values.

Code: Select all

uses Series;

procedure TForm1.FormCreate(Sender: TObject);
var MyLine: TLineSeries;
begin
  MyLine:=TLineSeries.Create(self);
  Chart1.AddSeries(MyLine);

  With MyLine do
  begin
    Marks.Visible:=true;
    Marks.Style:=smsValue;

    Add(17, '14-5-05');
    Add(16, '9-7-05');
    Add(27, '3-9-05');
    Add(22, '11-9-05');
    Add(16, '29-10-05');
    Add(14, '22-12-05');
    Add(17, '23-2-06');
    Add(16, '19-3-06');
    Add(24, '20-4-06');
    Add(16, '14-7-06');
  end;
end;

Posted: **Fri Feb 02, 2007 1:49 pm**

Hello,

thanks for the solution. We were hinted in the right direction and we solved the problem.

Thanks.
Rob

Steema Central

Dates in bottom axis in regular intervals

Dates in bottom axis in regular intervals