I'm looking for equivalent of checkbox "Show page number" in chart editor.

there was critical to set PrintProportional to False. But description of this property doesn't correrspond with its real function...

TeePreviewPanel.Panel := FChart; TeePreviewPanel.PrintMargins := Rect(3, 3, 3, 3); // % FChart.PrintMargins := TeePreviewPanel.PrintMargins; TeePreviewPanel.Print; after Print, FChart.PrintMargins are set to values according to visible margins on TeePreviewPanel. TeePreviewPanel.PrintMargins does'nt...

I found no method to realize it without modifying data. But you can use following trick: 1. Add new helper serie (e.g. FastLine) with NO data to the chart 2. Set maximum and minimum of bottom axis to 0 and 80. 3. Assign TOP axis as horizontal axis of original serie 4. Hide TOP axis (Visible := False...

I had the same problem with TeechartPro 7 under Delphi 5 and 7. I discovered that unit TeeEdit must be included in uses clause, otherwise runtime error "Class XXXseries not found" appears during LoadChartFromStream if Chart consists series (with or without data). But I have no explanation for it.

9340187 wrote: (lineseries.yvalues[kk+1]-lineseries.yvalues[kk-1]/2),

it should be

(lineseries.yvalues[kk+1]-lineseries.yvalues[kk-1])/2,

otherwise your code seems to work properly

What do you mean - "reduce data"? You can e.g.:
- eliminate every n-th value(s)
- average every x values
- compress data with loseless compression algorithm
...

After loading chart, original series objects are lost a new will be created (if loaded chart consists any). You must use Chart.Series property to access new series: Chart1.Series[0].AddXY(2,2) Also, by my experience, is good practice to initialize chart object before LoadChartFromStream. See my repl...

I discovered that unit TeeEdit must be included in uses clause, otherwise runtime error "Class XXXseries not found" appears during LoadChartFromStream if Chart consists series (with or without data).

Do you have any explanation?

With this component and bit of code you can realize unlimited undo/redo function with TChart. Automatically traced TChart events: Zoom, Unzoom, Scroll. With sample application. Free license (GNU GPL 2). Download at www.dcentral.name/delphi/components.

Updated to v1.02!!

My experience: LoadChartFromStream procedure have unpredicable result if applied on non empty Chart. It is better to initialize Chart to defined state before LoadChartFromStream. Simply use helper Chart (global variable), initialized once anywhere in application starting section. Modified code (only...

OK, in this article seems to be original (and more practical I think) idea of DrawAllPoins property. But reality is another thing. I've TeeChartPro7 VCL version and help file describes true realized behavior.