how to display math functions in correct form

[cpalx]

Hello,

do you hay any idea how can display a math function like word equation?

thanks

[J-G]

I would simply create the equation in a drawing program (I use CorelDRAW) and then export it to a .PNG image file.

I'm not aware of a way to get Laz to interpret LaTeX formatted text - which is what I suspect you would like 

[cpalx]

 

[cpalx]

I want dinamically with lazarus

thanks

[Edson]

If you want to graphic dinamically any function, first you will need some kind of expression evaluator. Then some graphic engine to plot the result.

[wp]

For expression evaluation you can use fpexprpars which is part of FPC, see the wiki tutorial http://wiki.lazarus.freepascal.org/How_To_Use_TFPExpressionParser. And for plotting the function you can use TAChart, see for example http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_Getting_started or http://wiki.lazarus.freepascal.org/TAChart_Tutorial:_Function_Series. Unfortunately, TAChart cannot create a 3d plot.

A worked-out (2D) math plotter is on my sourceforge site: https://sourceforge.net/p/wp-laz/code/HEAD/tree/MathPlotter/trunk/

[J-G]

I don't believe that cpalx has any problem with plotting the graph of the function but he does want to display the formula as it would appear in a text book or learned paper. For this he would need something like LaTeX which interprets

         pi * sqrt (2(a^2 + b^2 .... etc. 

and show the formula on screen as shown below.

Rather larger than I intended and under [edit] there doesn't appear to be a way of replacing it with a smaller version.

[zamtmn]

J-G
There is one good component. It is for Delphi, but I don't think the porting will be very difficult
http://www.delphikingdom.com/asp/viewitem.asp?catalogid=718

[cpalx]

i will try it. thank you