Solved

Calculating Complex Equations...

Posted on 2003-11-07
3
398 Views
Last Modified: 2010-04-16
Hi,

I am developing a mathematical application that involves the storage and process of equations of cubic and quartet order. I am storing the data in an MSDE database. The equation is stored in the database in the following format, (all equations are structured this way at the moment);

3.5604e-3*x(3) + 4.5394e-2*x(2) + 2.9238e+1*x(1) + 2223

The x(3) is interperated as x cubed, x(2) x squared.

The UI extracts this equation and has to break it into its atomic parts substituting x with a user input and calculating it accordingly.

Can anyone advise me on a more efficient storage format of the equations and a technique to break the equation into its constituent parts for ease of calculation.

kind regards Imran Farooq
0
Comment
Question by:imran89
3 Comments
 
LVL 44

Expert Comment

by:Arthur_Wood
ID: 9703538
1) you can use the SPLIT function to break up each member of the polynomial :

Split(strFormula,"+")

you can then split each part, into the two factors, using the *

Split(Part, "*")

then extract the power of x from the (...) (if the () is present)

actually rather close to a problem I solved a long time ago (1963 - in FORTRAN, after my Freshman year in college, worked as a Summer Intern at what is now UCSD, in La Jolla, Calif)...and no, I do not have the code.

AW
0
 
LVL 1

Accepted Solution

by:
jdauie earned 60 total points
ID: 9708835
You could easily make a class for it that would hold an array of coefficients.  You wouldn't even need to include the variable and the exponent if you have similar equations.
You can then save the object using serialization.
0
 

Author Comment

by:imran89
ID: 9709732
That seems a good idea, how would I hold the coefficients in a class, could you elaborate for me please as this is my first project in c#.

kind regards Imran
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Visual Studio 2013 debugging 2 35
Why Does This Page Not Show Up? 4 24
Error on Add method 1 38
C# 2015 Downloading text file and preserving the line breaks 5 20
Introduction This article series is supposed to shed some light on the use of IDisposable and objects that inherit from it. In essence, a more apt title for this article would be: using (IDisposable) {}. I’m just not sure how many people would ge…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

25 Experts available now in Live!

Get 1:1 Help Now