How can I generate random numbers to plot my graph?

x = randi([-50,50],1000,1);

y = randi([-50,50],1000,1);

So I got given a p-code file where I try out points and see if the artefacts are lying below or not.

The range are -50 to 50 on both x and y axis

I want to use random numbers to help me find out the info, but the code I used are only generating intergers. I want to generate random numbers in 4 decimal place covering the range -50 to 50.

[John D'Errico]

Did you read the help for rand? It gives an explicit example of how to generate random numbers (NOT integers) in a given range from a to b.

Answer 1

[Jan]

  x = round(-50 + rand(1000,1) * 100, 4);
  y = round(-50 + rand(1000,1) * 100, 4);

See: doc rand and doc round .

Alternatively getting the "4 decimal places" can be achieved by this also:

x = randi([-500000, 500000], 1000, 1) / 10000;
y = randi([-500000, 500000], 1000, 1) / 10000;

[fengsen huang]

thank you very much, I see you can just use more digit