bsxfun

Evaluates the function func on the elements (element-wise operation) of the input matrices.

Syntax

R = bsxfun(func, input1, input2)

Inputs

func
Function to be evaluated. The function must accept two scalar inputs.
Type: char | string | handle
input1
Matrix or scalar to be operated on.
Type: scalar | matrix
input2
Matrix or scalar to be operated on.
Type: scalar | matrix

Outputs

R
Resulting output.

Examples

Evaluate function on scalar and matrix inputs: 
function z = my_fun(a,b)
  z = 2*max(a,b)+b;
end

R = bsxfun(@my_fun, 2, [2 3 4;5 6 7])
R = [Matrix] 2 x 3
 6   9  12
15  18  21
Evaluate function on matrix inputs: 
function z = my_fun(a,b)
  z = 2*max(a,b)+b;
end

R = bsxfun(@my_fun, [1 2 3;10 11 12], [2 3 4;5 6 7])
R = [Matrix] 2 x 3
 6   9  12
25  28  31
Evaluate function on nd matrix and matrix inputs: 
function z = my_fun(a,b)
  z = 2*max(a,b)+b;
end

a = [1 2 3;4 5 6];
a(:,:,2) = ones(2, 3);
b = [2 3 4;5 6 7];
R = bsxfun(@my_fun, a, b)
R = [Matrix] 2 x 3
 6   9  12
25  28  31

Comments

If both input1 and input2 are matrices then their dimensions must be the same.