Search found 20 matches

by Errol
Fri May 15, 2020 6:32 am
Forum: VCL
Topic: LinePen.Visible not working if pointers are not visible
Replies: 1
Views: 625

LinePen.Visible not working if pointers are not visible

I am using TeeChart for Delphi XE10. I wish to draw gridlines on a special graph using an array of line series. However, it seems that I cannot hide the lines unless I make the pointers visible. This fix was promised in 2013 but does not seem to have happened. Here is the code I am using. with fSeri...
by Errol
Mon Mar 02, 2020 3:48 am
Forum: VCL
Topic: Labelling data points
Replies: 2
Views: 2021

Re: Labelling data points

Further to my previous post, I have found that I can use TPointSeries.Labels to write labels, and the ChartAfterDraw even to write them in the correct position. However, I do seem able to skip a label - i.e. not write a label at some of the series points. The corresponding Y-value is always written ...
by Errol
Fri Feb 28, 2020 5:48 am
Forum: VCL
Topic: Labelling data points
Replies: 2
Views: 2021

Labelling data points

I have a array, each element consisting of three values, X, Y, Value. I wish to plot these as a point series on a DBChart, with the value written besides each point. I have looked through your forum and the Tee9New program, but cannot find how to get started. Besides writing the value besides each p...
by Errol
Thu Feb 20, 2020 7:48 pm
Forum: VCL
Topic: Fixed x to y ratio
Replies: 8
Views: 3301

Re: Fixed x to y ratio

Hi Marc Thanks for your suggestions. However, I cannot run the demo itself as Base in uses, and class(TBaseForm) give an error.
Regards
Errol
by Errol
Thu Feb 20, 2020 3:56 am
Forum: VCL
Topic: Fixed x to y ratio
Replies: 8
Views: 3301

Re: Fixed x to y ratio

Hi Marc Thanks for the directions to the examples. I found them anyway - I had moved them to a backup drive for some reason. However, I have a problem. In the MakIsoAxis code snippet below, the values of ChartHeight and ChartWidth are always zero. Both Vertical and ParentChart are assigned. I have t...
by Errol
Mon Feb 17, 2020 9:32 pm
Forum: VCL
Topic: Using DBChart with text data
Replies: 4
Views: 2472

Re: Using DBChart with text data

Thanks Marc

That did the trick. I had set the Orders, but after I had loaded the data.

Best regards

Errol
by Errol
Mon Feb 17, 2020 7:40 am
Forum: VCL
Topic: Fixed x to y ratio
Replies: 8
Views: 3301

Re: Fixed x to y ratio

Further to the query by Estechco of 23 August 2010, I am interested in the same solution. I have gone to the demo at All features\Welcome !\Axes\Isometric Axis, but there is no source code. Can you give more information as to how I can access the source code. I have Tee Chart Pro, but I cannot under...
by Errol
Mon Feb 17, 2020 7:00 am
Forum: VCL
Topic: Using DBChart with text data
Replies: 4
Views: 2472

Re: Using DBChart with text data

Hi Marc
Thanks for the solution to my problem. However, I am trying to plot a closed polygon, and I can only plot values in an increasing-X direction. How can I plot the data in array index order.
Thanks and regards
Errol
by Errol
Wed Feb 12, 2020 7:42 pm
Forum: VCL
Topic: Using DBChart with text data
Replies: 4
Views: 2472

Using DBChart with text data

Good morning I use DBChart to access data from a database and/or a memory table, using XValues, YValues and DataSource in TSeries. Now I wish to add a series with the data either in an array or from calculations. Is there a straightforward way to do this, or do I have to populate a memory table with...
by Errol
Wed Nov 27, 2019 5:15 am
Forum: VCL
Topic: A new ternary graph implementation
Replies: 2
Views: 2664

Re: A new ternary graph implementation

Hello Marc Thank you for your reply and comments. Perhaps I haven't explained myself clearly enough. I still expect to be able to use three variables, X, Y and Z in a Ternary Chart, but the chart code will automatically convert these to three relative variables using the following formulae: X% = X/(...
by Errol
Thu Nov 21, 2019 1:07 am
Forum: Wishes and ideas
Topic: A new implementation for Ternary Graphs
Replies: 0
Views: 6781

A new implementation for Ternary Graphs

The current Ternary Series implementation in TeeChart needs a revamp. It does not suit a lot of users who wish to plot data in a similar format to a regular X-Y plot, without having to implement a lot of special code. A ternary plot is basically an X-Y plot, as there are only 2 independent variables...
by Errol
Fri Nov 15, 2019 12:17 am
Forum: VCL
Topic: A new ternary graph implementation
Replies: 2
Views: 2664

A new ternary graph implementation

As you know, I am quite disappointed with the Ternary Series implementation in TeeChart. A ternary plot is simply an X-Y plot, as there are only 2 independent variables (Z is always equal to 100 - X% - Y% where X% = X/(X+Y+Z)*100 and Y% = Y/(X+Y+Z)*100. This means there is no need to use 3D charting...
by Errol
Fri Sep 27, 2019 12:53 am
Forum: VCL
Topic: Ternary Graph Assigning the Weighting parameter
Replies: 22
Views: 8077

Re: Ternary Graph Assigning the Weighting parameter

Hi Marc I am pleased to report that we are now able to create ternary graphs with the legend in the format we require. Thanks for all your help. I have two further questions: 1. User-customisation of the legend position and size. I anticipate that users of our application would like to position the ...
by Errol
Mon Sep 23, 2019 5:59 am
Forum: VCL
Topic: Ternary Graph Assigning the Weighting parameter
Replies: 22
Views: 8077

Re: Ternary Graph Assigning the Weighting parameter

Hi Marc I have downloaded and installed the modifications, which appear to have fixed the problem of the Weight parameter being incorrectly assigned. I can now generate a ternary plot but am having great difficulty with generating a customised legend. I have attached an XY plot showing the type of l...
by Errol
Fri Sep 20, 2019 5:53 am
Forum: VCL
Topic: Ternary Graph Assigning the Weighting parameter
Replies: 22
Views: 8077

Re: Ternary Graph Assigning the Weighting parameter

Hi Marc Thank you for your email. In my previous post, I was trying to explain that any point on a ternary graph can be plotted on a normal XY chart that has the left axis at an angle of 60°. The B% value is plotted on the bottom axis (with a left-to-right scale of 0 to 100) along a line parallel to...