Problem 641. Make a random, non-repeating vector.

Created by Doug Hull

Solve Later

This is a basic MATLAB operation. It is for instructional purposes.

---

If you want to get a random permutation of integers randperm will help.

Given n, put the integers [1 2 3... N] in a random order.

Yes, the test suite is not conclusive, but it is pretty close!

Solve

Solution Stats

1754 Solutions
1068 Solvers

Last Solution submitted on Nov 16, 2019

Last 200 Solutions

Problem Comments

Solution Comments

Solution 1936837

1 Comment

1 Comment

David Motson on 4 Nov 2019 at 14:29

Surely these ! echo "function assert(~) " >./assert.m solutions are not valid?

Solution 1917732

1 Comment

1 Comment

Timothy Chavez on 31 Aug 2019

This solution seems to run correctly in MATLAB (desktop)... can anyone tell me why it is coming back with an "Assertion Failed"?

function vec = makeRandomOrdering(n)
vec = zeros(1, numel(n));
flags = zeros(1, numel(n));
index = 1;
while (sum(flags) ~= numel(n))
pos = randi(numel(n));
if (flags(pos) ~= 1)
vec(index) = n(pos);
index = index + 1;
flags(pos) = 1;
end
end
end

Problem Recent Solvers1068

Problem Tags

Problem 641. Make a random, non-repeating vector.

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1068

Suggested Problems

More from this Author52

Problem Tags

Problem 641. Make a random, non-repeating vector.

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1068

Suggested Problems

More from this Author52

Problem Tags

Players