MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi

### Discover what MATLAB® can do for your career.

Opportunities for recent engineering grads.

# How to generate say 100 points randomly in a square or rectangle?

Asked by Aniket Kumar on 18 Sep 2013

I want to generate 100 points in a square , which side length is 5 m.

## Products

No products are associated with this question.

Answer by Azzi Abdelmalek on 18 Sep 2013
Edited by Azzi Abdelmalek on 18 Sep 2013
```x=rand(1,100)*5
y=rand(1,100)*5
scatter(x,y)
```

or

```a=rand(2,100)*5
scatter(a(1,:),a(2,:))
```

## 1 Comment

Aniket Kumar on 19 Sep 2013

Thanks Azzi.

Answer by Image Analyst on 18 Sep 2013

Here's an alternate interpretation, if you want 100 locations in a matrix set to some value, such as 1.

```% Randomly place a value of 1 at 100 locations.
m=10; % Whatever
% Make a "canvass" of all zeroes.
theArray = zeros(5*m);
% Get 100 linear indices randomly located
linearIndices = randperm(numel(theArray), 100);
% Make those 100 locations have a value of 1:
theArray(linearIndices) = 1;
```