MATLAB: Ceil function – please help

ceil functionMATLABpsychtoolbox

Can i use Test_Order = ceil(Trial_Order./Trials_Per_Test); to generate random ordering of possible conditions in a stroop test?
Fundamentaly, what i mean is : can i use that function to set up test with words intead of number?
I am asking as I know ceil function round up number, hence i am not sure i can use it for my specific test.

Best Answer

TrialOrder = randperm(Number_of_elements, Number_to_select)
Words(TrialOrder)
This applies provided that each element is to be selected at most once (selection without replacement). If you are trying to randomize the order of presentation of words in which each word is to occur exactly the same number of times over the whole sequence, then you would use different code that would depend on the rules about how soon the same word can reappear.
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