Left Axis Labeling

[s_milli]

I upgraded from TeeChart 2012 to 2015.16 and now the left axis labels are behaving strange for the same code. It is not creating all the tick labels like it did in 2012. I am dealing with very small numbers (1e-12), so I don't know if that has anything to do with it. Also, it tends to set the minimum to an extremely small number (and sometimes negative) even though the data is no smaller than 5e-18.

Here is what a plot looked like with 2012:

Left Axis TeeChart 2012.JPG (14.67 KiB) Viewed 5259 times

Here is what the same plot looks like with 2015.16 running the same code only linked to 2015.16:

Left Axis TeeChart 2015.16.JPG (13.01 KiB) Viewed 5261 times

In an attempt to fix this issue, I have tried programmatically setting the left axis properties including auto versus manual min max settings. Nothing I've tried fixes this.

Any insight would be appreciated.

Thanks,
Scott

[Yeray]

Hi Scott,

Could you please arrange a simple example project we can run as-is to reproduce the problem here?

Thanks in advance.

[s_milli]

Hi Yeray,

Here is a simple generic project in Embarcadero C++ Builder XE7 that shows the problem. I set up the code to generate random numbers in the range that causes problems. I have three buttons on the form that produce three different results showing the progression of the problem. Each time you click a button, a new random set of data is plotted.

- Button 'Plot 1e-10' has normal labeling most of the time. Occasionally, the minimum label for the Y-axis goes to 2.7e-26 when the rest of the data is in the 1 to 9e-11 range.
- Button 'Plot 5e-11' only has labels for two or three major ticks and nothing else.
- Button 'Plot 1e-11' only has one label towards the top.

There seems to be a hard cutoff around 3e-11. I have tried both autoscaling and manually setting the min and max for the Y-axis (left axis). Neither seems to make a difference in this behavior.

Thanks,
Scott

[Yeray]

Hello,

I've moved your test application to Delphi and reduced it to the minimum and I'm still able to reproduce the problem here so I've added it to the public tracker:
http://bugs.teechart.net/show_bug.cgi?id=1390

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