Thanks, Alexander.
I have tried to deconstruct the code in the demo, but cannot understand
it works, and my efforts to copy the code end in unspecified access
violations.
In any event, I cannot set up simple multipiers like you have in the
sample -- I have a database with hundreds of climate data files, and
with new climate normals being released, would like to add hundreds
more. Each data set would have to be transformed individually.
It might be more helpful to be able to set max and min values in
TUserDefinedChartSource -- you have that capability in
TRandomChartSource (that much I did understand from the axis demo).
Thanks again,
Dave
On 7/28/2011 5:56 AM, Alexander Klenin wrote:
On Thu, Jul 28, 2011 at 14:32, David M. Lawrence<[email protected]> wrote:
Was the 2nd-Y axis patch (No. 13832;
http://bugs.freepascal.org/view.php?id=13832) ever incorporated into the
Lazarus/TAChart release? I'm new to Lazarus and don't quite know how to
interpret the bugtracker page. I do know that I cannot find some of the
changes mentioned in the patches -- such as for TAGraph -- in the latest
version of TAGraph.
The changes were not taken literally. Instead, I have implemented more general
solution, allowing arbitrary number of axises with arbitrary transformations,
but at the cost of some additional complexity.
I do scientific programming and am trying to update some of my older
Delphi/Pascal programs. I need the ability to independently set YMax and
YMin values for both Y axes on climate diagrams (which plot both monthly
precipitation and temperature data) on the same chart. Precipitation data
are plotted as bar graphs, temperature data are plotted by line series. I
can get all the data series plotted, but I cannot get the precip and temp
data scaled properly.
If you are using 0.9.30 release, see "axis" demo.
If you are using trunk/snapshot, see "axistransf" demo.
--
------------------------------------------------------
David M. Lawrence | Home: (804) 559-9786
7471 Brook Way Court | Fax: (804) 559-9787
Mechanicsville, VA 23111 | Email: [email protected]
USA | http: http://fuzzo.com
------------------------------------------------------
"All drains lead to the ocean." -- Gill, Finding Nemo
"We have met the enemy and he is us." -- Pogo
"No trespassing
4/17 of a haiku" -- Richard Brautigan
--
_______________________________________________
Lazarus mailing list
[email protected]
http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
