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

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

[SUSHMA MB]

How to generate say 10 out of 100 random points on a straight line joining two points? I have two points let, (x1,y1) and (x2,y2). These two points are joined by a straight line. Now i want to generate, 10 points out of 100 random points on the straight line. Let the boundary be a square, with side length 50m

Answer 1

[Azzi Abdelmalek]

x=rand(1,100)*5
y=rand(1,100)*5
scatter(x,y)

or

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

[GA optimization]

Thanks Azzi.

[SUSHMA MB]

How to generate say 10 out of 100 random points on a straight line joining two points? I have two points let, (x1,y1) and (x2,y2). These two points are joined by a straight line. Now i want to generate, 10 points out of 100 random points on the straight line. Let the boundary be a square, with side length 50m

[Aviral Srivastava]

Sushma MB,

Generate a random number, t, in between 0 and 1 inclusive.

Let us call the random point as pt. So, pt.x and pt.y are the coordinates of this random point that you want to plot.

pt.x = (1-t) * x1 + (t) * x2
pt.y = (1-t) * y2 + (t) * y2

I hope you got it.

[Tamoor Shafique]

How can I generate 100 random points in randomly in one of the sphere/cube/rectangulare 3D space?

[Akhil Govindraj]

That's easy Tamoor Shafique, all you've gotta do is extend this code to the z axis as well and use scatter3() instead of scatter():

x=rand(1,100)*5;
y=rand(1,100)*5;
z=rand(1,100)*5;
scatter3(x,y,z)

Answer 2

[Image Analyst]

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;

[SUSHMA MB]

How to generate say 10 out of 100 random points on a straight line joining two points? I have two points let, (x1,y1) and (x2,y2). These two points are joined by a straight line. Now i want to generate, 10 points out of 100 random points on the straight line. Let the boundary be a square, with side length 50m

[Tamoor Shafique]

How can I generate 100 random points in randomly in one of the sphere/cube/rectangulare 3D space?

[Image Analyst]

See the FAQ: https://matlab.fandom.com/wiki/FAQ#How_do_I_create_a_set_of_random_locations_within_a_circle.3F

There is also one for a sphere right below that. Adapt as needed.