Product Documentation

Search MATLAB Documentation
R2012a Documentation → MATLAB
View documentation for other releases	Learn more about MATLAB

Contents

Index

• Getting Started

• User's Guide

• Functions

• Desktop Tools and Development Environment

• Data Import and Export

• Mathematics

• Arrays and Matrices

• Linear Algebra

• Elementary Math

• Polynomials

• Interpolation and Computational Geometry

• Cartesian Coordinate System Conversion

• Nonlinear Numerical Methods

• Special Functions

• Sparse Matrices

• Elementary Sparse Matrices

• Full to Sparse Conversion

• Sparse Matrix Manipulation

• Reordering Algorithms

• Linear Algebra

• Linear Equations (Iterative Methods)

• Tree Operations

• Math Constants

• Data Analysis

• Programming and Data Types

• Object-Oriented Programming

• Graphics

• 3-D Visualization

• GUI Development

• External Interfaces

• Examples

• Release Notes

sprank - Structural rank

Syntax

r = sprank(A)

Description

r = sprank(A) is the structural rank of the sparse matrix A. For all values of A,

sprank(A) >= rank(full(A))

In exact arithmetic, sprank(A) == rank(full(sprandn(A))) with a probability of one.

Examples

A = [1    0    2    0
     2    0    4    0 ];

A = sparse(A);

sprank(A)

ans =
     2

rank(full(A))

ans =
     1

Free MATLAB Interactive Kit

Explore how to use MATLAB to make advancements in engineering and science.

Download free kit

Trials Available

Try the latest version of MATLAB and other MathWorks products.

Get trial software