Solved

matrix class

Posted on 2003-11-30
11
541 Views
Last Modified: 2010-04-01
looking for a matrix class address

0
Comment
Question by:hermesc
  • 7
  • 4
11 Comments
 
LVL 30

Expert Comment

by:Axter
ID: 9845328
What do you mean by class address?
0
 
LVL 30

Expert Comment

by:Axter
ID: 9845330
// Here's a 2 dynamic matrix class

template < class T>
class dynamic_2d_array
{
public:
      dynamic_2d_array(int row, int col):m_row(row),m_col(col), m_data((row!=0&&col!=0)?new T[row*col]:NULL){}
      ~dynamic_2d_array(){if(m_data) delete []m_data;}
      inline T* operator[](int i) {return (m_data + (m_col*i));}
      inline T const*const operator[](int i) const {return (m_data + (m_col*i));}
private:
      const int m_row;
      const int m_col;
      T* m_data;
};
0
 

Author Comment

by:hermesc
ID: 9845497
web address :=)

i need a matrix class
0
DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

 
LVL 30

Expert Comment

by:Axter
ID: 9845518
Also check out the following links for matrix class:

Matrix class implemented using valarrays:
http://www.hep.ucl.ac.uk/atlas/atlfast/Doxygen/5.1.0/AtlfastUtils-00-00-10/Matrix_8h-source.html

blitz++:
http://www.oonumerics.org/blitz/ 

newmat:
http://www.robertnz.net/nm_intro.htm

Matrix Template Library (MTL):
http://www.osl.iu.edu/research/mtl/

boost libray multi-array class:
http://www.boost.org/libs/multi_array/doc/user.html
0
 
LVL 30

Expert Comment

by:Axter
ID: 9845534
>>web address :=)
>>i need a matrix class

Do you just need a class that can hold web address?

If so, you can use vector<string> object to hold a matrix of web address.

std::vector<std::string>  MyWebAddressMatrix;

//Add address via following method:
MyWebAddressMatrix.push_back("www.experts-exchange.com");

//Access item in array via following method.

cout << MyWebAddressMatrix[0] << endl;

0
 
LVL 30

Expert Comment

by:Axter
ID: 9845543
If that's not what you need, please provide much more details.

Spell out exactly what you need.
Tell us what is your requirement, and how you intend to use this matrix, so that we can have a better understanding of what you're looking for.
0
 

Author Comment

by:hermesc
ID: 9845917
I need a website a web adress ( world wide web ) which there is a class ( or it may be a FTP!!!!! )!!!! ( a class which its purpuse is matrix! )
( matrix : not the matrix which keanu plays the matrix which we use in maths )

I hope it is clear now
0
 

Author Comment

by:hermesc
ID: 9845930
I need a website a web adress ( world wide web ) which there is a class ( or it may be a FTP!!!!! )!!!! ( a class which its purpuse is matrix! )
( matrix : not the matrix which keanu plays the matrix which we use in maths )

I hope it is clear now

this class should be able to these operations

*,+,-, inverse , other basic matrix operations not the complex orthogonal or nonlinear ones ( or whatever you may think which is advanced )
0
 
LVL 30

Expert Comment

by:Axter
ID: 9845940
>>I hope it is clear now

I'm sorry, but you're still missing information.

When you say it's purpuse is matrix, what is the matrix suppose to do, and what is it suppose to store?

>>I need a website a web adress ( world wide web ) which there is a class

Which there is what class?
What is the class suppose to do?  What exactly is it's function.

Explain the what and how.
It might help if you give an example.
0
 
LVL 30

Accepted Solution

by:
Axter earned 100 total points
ID: 9845956
>>*,+,-, inverse , other basic matrix operations not the complex orthogonal or nonlinear ones ( or whatever you may think which is advanced )

OK, now we're getting somewhere.

The STL valarray class is suppose to serve this purpose, but I wouldn't recommend it.
If you want to use the valarray class, see the following link:
http://www.hep.ucl.ac.uk/atlas/atlfast/Doxygen/5.1.0/AtlfastUtils-00-00-10/Matrix_8h-source.html


Otherwise try looking at the previous links I posted for matrix class.
0
 

Author Comment

by:hermesc
ID: 9850638
thanks for your valuable helps

axter

0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Grammars for C C++ and java 1 122
Socket Programming (Unix) 8 129
Problem with SqlConnection 4 170
Embarcadero C++ builder XE10.1 Berlin TRegistry declaration 1 29
Errors will happen. It is a fact of life for the programmer. How and when errors are detected have a great impact on quality and cost of a product. It is better to detect errors at compile time, when possible and practical. Errors that make their wa…
Article by: SunnyDark
This article's goal is to present you with an easy to use XML wrapper for C++ and also present some interesting techniques that you might use with MS C++. The reason I built this class is to ease the pain of using XML files with C++, since there is…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

821 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