Failing randomization through closing matlab

Hello everyone,

I am coding an experiment but I ran into a problem regarding the presentation of random stimuli. The experiment includes a trial list which is mostly created using the randi() function. However, everytime I close Matlab and script, the numbers will exactly the same in the next session. This does not happen if a simply leave the matlab window open and rerun the code.

Any ideas concerning the root of this problem?

Thank you in advance!

Best,

Kathrin

Answer 1

[Ameer Hamza]

Read here: https://www.mathworks.com/help/matlab/math/why-do-random-numbers-repeat-after-startup.html . You can avoid the repetition by running

rng('shuffle');

at startup.

[Kathrin Sadus]

Thanks, that was really helpful!

[Ameer Hamza]

I am glad to be of help!!!