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plus, +

Symbolic addition

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Syntax

A + B
plus(A,B)

Description

A + B adds A and B.

example

plus(A,B) is equivalent to A + B.

example

Examples

Add Scalar to Array

plus adds x to each element of the array.

syms x
A = [x sin(x) 3];
A + x
ans =
 
[ 2*x, x + sin(x), x + 3]

Add Two Matrices

Add the identity matrix to matrix M.

syms x
M = [x x^2;Inf 0];
M + eye(2)
ans =
[ x + 1, x^2]
[   Inf,   1]

Alternatively, use plus(M,eye(2)).

plus(M,eye(2))
ans =
[ x + 1, x^2]
[   Inf,   1]

Add Symbolic Functions

syms f(x) g(x)
f(x) = x^2 + 5*x + 6;
g(x) = 3*x - 2;
h = f + g
h(x) =
x^2 + 8*x + 4

Add Expression to Symbolic Function

Add expression expr to function f.

syms f(x)
f(x) = x^2 + 3*x + 2;
expr = x^2 - 2;
f(x) = f(x) + expr
f(x) =
2*x^2 + 3*x

Input Arguments

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Input, specified as a symbolic scalar variable, matrix variable, function, matrix function, expression, or vector, matrix, or array of symbolic scalar variables.

Input, specified as a symbolic scalar variable, matrix variable, function, matrix function, expression, or vector, matrix, or array of symbolic scalar variables.

Tips

  • All nonscalar arguments must be the same size. If one input argument is nonscalar, then plus expands the scalar into an array of the same size as the nonscalar argument, with all elements equal to the scalar.

Version History

Introduced before R2006a

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See Also

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