Constrain randomisation in Javascript

ana555

Hello,

I hava a question about constraining max number of repeats of a variable created with Javascripts.

I have created a variable that selects a random number between 1-10 in an inline_javascript:

function randomInteger(minval, maxval) {

return minval + Math.floor(Math.random() * (maxval - minval + 1))

}

vars.num = randomInteger(1,10)

console.log(vars.num)

is there any javascript code that works similar to "constrain var maxrep = 1" in the loop script?

For example, i dont want that the variable "num" does repeat the same number in the next trial.

Thank you very much!!!!!!!😃

eduard

Hi Ana,

There is no ready made function, but you could use a while loop to make this happen. I apologize for not providing Javascript code (I am not very familiar with it), but I think this Python code can be translated in a rather straightforward way.

import random
# save your previous array in a new variable
# This only works if var.num has been created before!
# So, on the second block and so on. Alternatively, you can create a fake list in the 
# beginning of the experiment to make this comparison easier
if var.block_no 1:
     var.prev_num = var.num
while True: 
    var.num = random.randint(1,11) 
    # compare the current first trial with the last trial of the previous sequence. 
    if var.num[0] != var.prev_num[-1]:
         break

I hope this helps,

Eduard