Using the C Math Library

Indexing into Arrays

Introduction

MATLAB provides access to elements in arrays, cell arrays, and structures through indexing. Using MATLAB indexing syntax, you can access individual elements, modify elements or delete elements in an array, cell array, or structure. For example, A(3,1) accesses the first element in row 3 of matrix A.

The MATLAB C Math Library provides the same indexing functionality as the MATLAB interpreter but through a different mechanism. Instead of an indexing operator, the MATLAB C Math Library provides the following indexing functions.

Function
Description

mlfIndexRef()
Read one or more values from an array, cell array, or structure.

mlfIndexAssign()
Change one or more values in an array, cell array, or structure.

mlfIndexDelete()
Remove one or more elements from an array, cell array, or structure.

Function	Description
`mlfIndexRef()`	Read one or more values from an array, cell array, or structure.
`mlfIndexAssign()`	Change one or more values in an array, cell array, or structure.
`mlfIndexDelete()`	Remove one or more elements from an array, cell array, or structure.

This section:

Provides an overview of indexing terminology

Describes how to call indexing functions for one-dimensional, n-dimensional, and logical subscripts

Describes how to assign values to array elements using indexing

Describes how to delete array elements using indexing

Describes how to index into cell arrays

Describes how to index into structure arrays

The section ends with a comparison of MATLAB and Math library indexing syntax.

Replacing Allocation and Deallocation Routines Terminology