I have a matrix in a class and I want to use it in a method in another class can you help me

Question

0.00/5 (No votes)

See more:

Java

Posted 15-Jul-13 1:44am

Member 8697827

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

**Joezer BH** · Answer 1 · 2013-07-15T02:09:00

Solution 1

Here's a simple example for the thin requirement you've stated:

C#

Class Matrix
{
   public Matrix (int n, int m)
   {
      // code ...
   }

   public Matrix CrossProduct(Matrix M)
   {
       // Calculate the Cross Product of this and the Matrix M
       // return the Cross Product
   }
}


// this class is using the Matrix class
Class UsingTheClassMatrixExample
{

   public static DoStuff()
   {
       Matrix M1 = new Matrix....
       Matrix M2 = new Matrix....

       Matrix CrossProduct = M1.CrossProduct(M2);
   }
}

If you need further help, like how to use the Matrix class as a dll in a different project etc let me know.

Good luck,
Edo

Posted 15-Jul-13 2:09am

Joezer BH

Comments

Member 8697827 15-Jul-13 8:39am

Thank you for your reply
I have a class containing a matrix
class matrix{
public void actionPerformed(ActionEvent e)
{
dd = new double[m_Instances.numAttributes()];
for (int i = 0; i < m_Instances.numAttributes() - 1; i++)
dd[i] = Double.parseDouble(JOptionPane.showInputDialog("Enter " + m_Instances.attribute(i).name()));
}}
and I want to add the matrix to another method in another class

class matrixxx
{
public final double splitCritValue(Distribution bags, double totalNoInst) {

double numerator;
double noUnknown;
double unknownRate;
int i;

noUnknown = totalNoInst-bags.total();
unknownRate = noUnknown/totalNoInst;
numerator = oldEnt(bags) - newEnt(bags);
numerator = (1-unknownRate)*numerator;

// Splits with no gain are useless.
if (Utils.eq(numerator,0))
return 0;

return numerator/bags.total();
}}
waiting for your reply
Dalia

Joezer BH 15-Jul-13 9:15am

Hi Dalia,
I am not sure what exactly you want to accomplish, please explain some more.

[[ Nice name - Dalia :) ]]

Member 8697827 16-Jul-13 3:13am

Dear Dr Maimonides
The numerator= oldEnt(bags) - newEnt(bags); in splitCritValue is for each attribute so I want to add to each element in the matrix for each attribute

Dalia

Shubhashish_Mandal 15-Jul-13 10:59am

Your Matrix class is looks like an event handler. But where is the event listener(ActionListener) .You are going to design some swing app.