[Lazarus] TAChart - Logarithmic Transform fails for X Axis

Salvatore Coppola coppolastudio at gmail.com
Sun Dec 8 18:44:57 CET 2013


Have you checked data (>0)?
Salvatore


2013/12/7 Peter Thurner <pm.thurner at gmx.at>

> 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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