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arraysmatlab
kal
kal

Reputation: 37

MATLAB: create a function 1 x N that can accept array of logical or double

I have to create this first script that can later be used by different 1 x N arrays. How would I code a 1 x N array function so in later use can include elements either 1 or 0 (logical or double).

As an example :

V = [1, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1];

So I can later test out code for many different values and lengths of V.

TEST CASE 1-------------------------------------------------------------------------------

[V] = lab3p2partA([1 0 1 0 1 0 0 0])

V =

1 0 0 0 1 1 0 0

Upvotes: 0

Views: 155

Answers (2)

rayryeng
rayryeng

Reputation: 104484

If V is already given, simply do:

V = V == 1;

... to turn V into a logical array.

However, if your intent is to generate a random array, you can use randi to generate a random integer array:

V = randi(2, N, 1) - 1;

You generate numbers of 1 or 2, then subtract by 1. randi's minimum value to generate is 1 and not 0 unfortunately.

You can also use rand with thresholding as the other post suggests:

V = rand(N, 1) > 0.5;

Make sure you choose 0.5 because rand generates things uniformly. rand generates values from [0,1] uniformly, so if you want (on average) an even number of 0s and 1s, set your threshold to 0.5.

Upvotes: 0

Philippe K
Philippe K

Reputation: 81

Not sure if it is sufficient for you, but you could do something like this:

N = 15; %to be changed to the desired length
V = rand(1,N)>.3 %Increase number for less ones, decrease for more.

(Source: http://www.mathworks.com/matlabcentral/answers/1202-randomly-generate-a-matrix-of-zeros-and-ones-with-a-non-uniform-bias)

Upvotes: 1

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