How to write program to choose random numbers from given input set?

Question

reshdev on 29 Aug 2014

0
Link

Direct link to this question

https://nl.mathworks.com/matlabcentral/answers/152795-how-to-write-program-to-choose-random-numbers-from-given-input-set

Answered: Image Analyst on 29 Aug 2014

Accepted Answer: Star Strider

i want to write two programs ----

a program that can randomly choose number T1 from [5, 10, 15] and if

if it choose T1=5, then it should give T2= 6

if it choose T1=10, then it should give T2= 11

if it choose T1=15, then it should give T2= 16

So, T2 is addition of 1 to T1

second program-----

if i have set of values P=(1,2,3,......10)

how to pick randomly P1 and P2 from above set such that P1 and P2 are not same.

0 Comments
Show -2 older commentsHide -2 older comments

Sign in to comment.

Sign in to answer this question.

Answer 1

Star Strider on 29 Aug 2014

0
Link

Direct link to this answer

https://nl.mathworks.com/matlabcentral/answers/152795-how-to-write-program-to-choose-random-numbers-from-given-input-set#answer_150214

Edited: Star Strider on 29 Aug 2014

Seems like homework.

My code:

X = 5:5:15;
T1 = X(randi(3));
T2 = T1+1;
P1 = X(randi(3));
P2 = setdiff(X,P1);
P2 = P2(randi(2));

2 Comments
Show NoneHide None

reshdev on 29 Aug 2014

Thank You. just to let you know, second program has nothing to do with first one. Sorry, i know it could be simple program but i am new to matlab.

Star Strider on 29 Aug 2014

My pleasure!

Sign in to comment.

Answer 2

Image Analyst on 29 Aug 2014

1
Link

Direct link to this answer

https://nl.mathworks.com/matlabcentral/answers/152795-how-to-write-program-to-choose-random-numbers-from-given-input-set#answer_150217

Try this:

% Program 1
clc;
% Define the choices:
choices = [5, 10, 15];
% Get T1 at random.
T1 = choices(randi(3,1,1))
% Get T2, which is one plus T1
T2 = T1 + 1;
% Program 2
P = 1:10
% Get two random locations that are different.
randomIndexes = randperm(length(P), 2)
% Extract the two values.
P1 = P(randomIndexes(1))
P2 = P(randomIndexes(2))