Graphing Math Functions

jonbobbly · Post by **jonbobbly** » Oct 09, 2007 5:28

I'm in need of a program to graph functions like y=2x-3 or y=x^2-7 and stuff like that. I can make code to draw the window and do most of the stuff I need, but I don't want to edit the source code every time I want to change the function.

This means that I need a parser. Something that I really don't know how to write for reading equations.

Any help is much appreciated.

(btw, I'm sorry if this doesn't make sense, I wrote it at 12:27am.)

VirusScanner · Post by **VirusScanner** » Oct 09, 2007 5:44

If you are just looking for a program that can graph these functions, look at SpeQ (http://www.speqmath.com/). It's really a very nice calculator.

If you need to write your own program for whatever reason, let me know and I'll try to help. In the meantime, I believe there have been some programs on the forum that have good math expression parsers. You may want to search for some of them.

KristopherWindsor · Post by **KristopherWindsor** » Oct 09, 2007 6:16

I'm going to make a GUI for my MiniCalc any day now - hopefully this week. It will allow graphing. You can try editing the text-mode program if you want. :-)

cha0s · Post by **cha0s** » Oct 09, 2007 8:30

You could try this http://www.freebasic.net/forum/viewtopic.php?t=5740

dodicat · Post by **dodicat** » Oct 09, 2007 15:26

jonbobbly wrote:I'm in need of a program to graph functions like y=2x-3 or y=x^2-7 and stuff like that. I can make code to draw the window and do most of the stuff I need, but I don't want to edit the source code every time I want to change the function.

This means that I need a parser. Something that I really don't know how to write for reading equations.

Any help is much appreciated.

(btw, I'm sorry if this doesn't make sense, I wrote it at 12:27am.)

I,ll email you a complete parser which can be a runner, or include file.
The code is too big to post here, Ive tried in the past and failed.
Easy to use, fast and efficient.
Gives roots/turning points of functions if required.
Let me know, and I'll send it off to you.

jonbobbly · Post by **jonbobbly** » Oct 09, 2007 20:28

You could try this http://www.freebasic.net/forum/viewtopic.php?t=5740

Thanks! This looks like a very impressive piece of code. I'm pretty sure that this will be able to do what I'm looking for.

Graphing Math Functions

Graphing Math Functions

Re: Graphing Math Functions