comma, ,

Command separator

Syntax

,

Description

The comma symbol (,) separates row elements in an array definition, subscripts in an indexing expression, function input and output arguments, and commands entered on the same line. For instance, A(3,2) uses a comma to separate array subscripts in an indexing command.

Examples

Array Elements

You can use commas or spaces to separate the row elements in an array. In practice, spaces are preferred but commas can be useful to visually separate longer expressions.

A = [2 4 6 8]

A = 1×4

     2     4     6     8

B = [1+1, 2+2, 3+3, 4+4]

B = 1×4

     2     4     6     8

Subscript Indexing

Use commas to separate the subscripts in an indexing expression. Use a colon to select an entire array dimension.

A = [1 2 3; 4 5 6; 7 8 9]

A = 3×3

     1     2     3
     4     5     6
     7     8     9

A(1,2)

ans = 
2

A(2,:)

ans = 1×3

     4     5     6

Function Inputs and Outputs

Use commas to separate the input and output arguments in a function call.

A = magic(5);
[Y,I] = max(A,[],2)

Y = 5×1

    24
    23
    22
    21
    25

I = 5×1

     2
     1
     5
     4
     3

Multiple Commands

Use commas to separate multiple commands on the same line and show output. Alternatively, use semicolons to separate commands on the same line while suppressing output.

A = 2, B = 3, C = A*B

A = 
2

B = 
3

C = 
6

Version History

Introduced before R2006a