Storing a sparse matrix in memory, Data Structure & Algorithms

Explain an efficient method of storing a sparse matrix in memory. Write a module to find the transpose of the sparse matrix stored in this way.

A matrix which contains number of zero entries in much higher number than the number of non zero entries is called sparse matrix. The normal method of representing matrices in memory as two-dimensional arrays may not be appropriate for sparse matrices. One may save space by storing only nonzero entries in the matrix. For example the matrix A (3*3 matrix) represented below

0      2     0

5     0     0

0     6     9

can be written in the sparse matrix form as follows:

3     3     4

0     1     2

1     0     5

2     2     6

2     3     9

Where the first row represent the dimension of matrix and last column tells us the number of nonzero values; second row onwards it is giving the position and value of the non zero number.


A function which is used to find transpose of a sparse matrix is:

void  transpose(x,r,y)

int x[3][3],y[3][3],r;


int i,j,k,m,n,t,p,q,col;



t=x[0][2]; y[0][0]=n; y[0][1]=m; y[0][2]=t;




for (col=0;col<=n;col++)




y[q][0]=x[p][1]; y[q][1]=x[p][0]; y[q][2]=x[p][2];







Posted Date: 7/9/2012 9:54:19 PM | Location : United States

Related Discussions:- Storing a sparse matrix in memory, Assignment Help, Ask Question on Storing a sparse matrix in memory, Get Answer, Expert's Help, Storing a sparse matrix in memory Discussions

Write discussion on Storing a sparse matrix in memory
Your posts are moderated
Related Questions
A linear collection of data elements where the linear node is given by means of pointer is known as Linked list

how to convert 12 hour format into 24 hour format using c program

List areutilized to maintainPOLYNOMIALS in the memory. For example, we have a functionf(x)= 7x 5 + 9x 4   - 6x³ + 3x². Figure depicts the representation of a Polynomial by means o

Using the cohen sutherland. Algorithm. Find the visible portion of the line P(40,80) Q(120,30) inside the window is defined as ABCD A(20,20),B(60,20),C(60,40)and D(20,40)

Beauty Salon is a system to be designed to manage the booking and the payment of a single beauty parlour. Beauty Therapists: A beauty parlour has a number of staff members mo

File organisation might be described as a method of storing records in file. Also, the subsequent implications approaching these records can be accessed. Given are the factors invo

Explain about Hidden-surface Hidden-line removal refers to wire-frame diagrams without surface rendering and polygonal surfaces with straight edges. Hidden-surface removal ref

Determine about the unreachable code assertion An unreachable code assertion is an assertion that is placed at a point in a program that shouldn't be executed under any circum