MATLAB Programming Fundamentals - MathWorks

Access Data in a Table

In this section...

“Ways to Index into a Table” on page 9-44

“Create Table from Subset of Larger Table” on page 9-46

“Create Array from the Contents of Table” on page 9-49

Ways to Index into a Table

A table is a container for storing column-oriented variables that have the same number of

rows. Parentheses allow you to select a subset of the data in a table and preserve the

table container. Curly braces and dot indexing allow you to extract data from a table.

If you use curly braces, the resulting array is the horizontal concatenation of the specified

table variables containing only the specified rows. The data types of all the specified

variables must be compatible for concatenation. You can then perform calculations using

MATLAB functions.

Dot indexing extracts data from one table variable. The result is an array of the same data

type as extracted variable. You can follow the dot indexing with parentheses to specify a

subset of rows to extract from a variable.

T.Variables horizontally concatenates all table variables into an array. T.Variables is

equivalent to T{:,:}.

To subscript into a table and select variables of a specified type, use the vartype

function.

Summary of Table Indexing Methods

Consider a table, T.

Type of

Indexing

Result Syntax Rows Variables

Parentheses table T(rows,var

s)

One or more rows,

specified by rows

One or more variables,

specified by vars

Curly Braces extracte

d data

T{rows,var

s}

One or more rows,

specified by rows

One or more variables,

specified by vars

9 Tables