Clear Filters
Clear Filters

How can I make an array of handles?

6 views (last 30 days)
Roy Elbaz
Roy Elbaz on 15 Nov 2017
Answered: Star Strider on 15 Nov 2017
Let's say I have a vector x=[1 2 3 4 5] (I don't know what's in it and the size its size is something I don't know in advance), And I want to make an array of handles which will, let's say, make the following:
f(i) = @(y) 3*x(i)+5*y;
How can I make it? (I'm using Matlab)
This is just a simple function but it will be the same principle I guess.

Answers (3)

Star Strider
Star Strider on 15 Nov 2017
Using bsxfun:
f = @(x,y) 3*x + 5*y; % ‘Parent’ Function
ary = @(x,y) bsxfun(f, x(:), y(:)'); % Create Virtual Function Array
x = [1 2 3 4 5]; % ‘x’ — Can Be Anything
y = randi(9, 1, 3); % ‘y’ — Can Be Anything
Result = ary(x, y); % Example Use

the cyclist
the cyclist on 15 Nov 2017
Edited: the cyclist on 15 Nov 2017
Use a cell array:
x = [3 4 5];
i = 2;
f{i} = @(y) 3*x(i)+5*y;
Notice the curly brackets on the left-hand side of the assignment.
  1 Comment
Roy Elbaz
Roy Elbaz on 15 Nov 2017
Ok thanks. Is there a way to do it in one action instead of going over all of x components? And if now, is there a way to pre-define the array so I won't enlarge it in every 'for' interval?

Sign in to comment.

Kaushik Lakshminarasimhan
Kaushik Lakshminarasimhan on 15 Nov 2017
You don't need an array of handles to do that. You can use arrayfun like this:
x = 1:5;
y = 5;
z = arrayfun(@(x,y) 3*x + 5*y, x(:), repmat(y,length(x),1));


Find more on Loops and Conditional Statements in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!