[Lazarus] TAChart - Logarithmic Transform fails for X Axis

Peter Thurner pm.thurner at gmx.at
Sat Dec 7 11:03:54 CET 2013


Hello *,

This is the first time that I post something, so please be patient with 
me :-)

I have been using Plotpanel now for a while to plot Bode diagrams within 
Lazarus GUIs.
Now I would like to switch to TAChart which seems very powerfull too.
I tried it out with linear graphs and it works very well.

But If I try to plot a bode diagram with a logarithmic x Axis then it 
crashes.
I followed the tutorial about logarithmic transform:
http://wiki.freepascal.org/TAChart_Tutorial:_ListChartSource,_Logarithmic_Axis,_Fitting
and I did all the steps successfully.

BUT If I try to apply a logarithmic transform to the bottom axis 
(x-axis) then it crashes.
It displays the graph but the grid lines are gone.
Has anybody tried already to apply log transform to bottom axis? It 
works for left axis.

Thanks
PeterT




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