Hi There I'm adding a Styles.Line series to a chart which has the axes scaling set to Automatic. Adding the series is causing the X axis scaling to change with undesirable results. I would like to keep the Automatic scaling as it works well for the data series - is there a way to prevent it from cha...

Thank you - your code sample helped, particularly using SeriesXYPoint to change the line points.

I took a different approach with the maths:

As we know the X values of the new points (i.e. the right or left edge of the chart) I used the slope and Y intercept to calculate the Y values.

y = mx + c

Hi Christopher Thank you for getting back to me. I already have some maths to calculate the slope and intercept - so that's all okay. My reason for using TrendFunction is to move away from our own maths and rely on the TeeChart library - so it seems a shame to use a combination of both. Please can y...

Hi Guys I am plotting a linear trend line with this: TrendFunction trendFunction =new TrendFunction(); trendLine = new Line(chart.Chart) { Function = trendFunction, DataSource = series }; Which is working nicely but the line is only drawn to the extents of the data in the series. Is it possible for ...

Thank you - that is exactly what I need.

Hi I'm trying to draw a Line using the Logarithmic style TrendFunction but cannot get anything to display. This is the code that I am using: TrendFunction logFunction = new TrendFunction(); logFunction.TrendStyle = TrendStyles.Logarithmic; Line logLine = new Line(chartInstance.Chart) {Function = log...

I have found a solution to the problem. Using 'DisableRotation' before doing the drawing fixes it.
Frank

I currently have a 3D point series chart which has a custom bit of drawing on it under a AfterDraw event. This custom drawing is not part of the 3D and is static as the chart is rotated in 3D. I want to update the chart to use OpenGL. I have initiated the OpenGl and it works fine except for the cust...

Hi I have been making a 3D OpenGL plot. The axis caption titles for the Depth and Right Axes are not plotted in the correct position (I believe this is a know bug). Hence I am trying to custom draw these titles using an after draw. The problem is I cannot figure out how to accurately find the positi...

Sandra We have look into this problem a bit more and find that when the Transparency is set to zero then the OpenGL works. With the code in the debugger the problem is in the TeeGLCanvas.pas unit function Function TGLCanvas.BeginBlending(const R:TRect; Transparency:TTeeTransparency):TTeeBlend; begin...

Hi Sandra Thanks for this I was not aware Tchart had OpenGL. I tried adding the OpenGl component to my project, but this on run would crash the program with an Object reference. I then went back and looked at your project you sent me. This looked like a standard VCL project so I created a new .Net V...

Hello I am trying to make a 3D plot of several series. I basically have one TTriSurfaceSeries and several TPoint3DSeries (plotted as points). I have made the TTriSurfaceSeries semi transparent and would like to show the TPoint3DSeries above and below the TTriSurfaceSeries surface depending on the da...

Narcis Thanks sorted the text position problem. Here is the code which causes the problem. I am only using one series per plot with color points. I could potentially have many different colors so do not want to create a series per color. uses Series; procedure TForm1.FormCreate(Sender: TObject); var...

I have a couple of what looks like bugs in some simple crossplots. I am using Tchart pro 7.11 with Delphi 2007 Bugs are Top plot the Y axis label overwrites the scale numbers. Only occurs when bottom number is a whole number. Scales can be anything so I have left on the auto scaling. http://www.sene...

Hello Narcís,

That's done the trick nicely.

I did go to the Customer Downloads section but the first level link still said V7.07 so i didn't look any further.

Perhaps you should update this link.

Many thanks - we can breath again.

Jon