What are you trying to achieve?: I’m trying to randomize two columns in my conditions file, one sound and one image, so that they do not always occur in the same pairs. E.g. sound 1, 2, 3, 4 and image a, b, c, d not always occurring in the combinations 1-a, 2-b, 3-c, 4-d. What did you try to make…

Sorry for the confusion. My code was coping with translating numbers to strings without ending .0. You just need listA.append(grid) In the trial routine you do need thisA=listA.pop() and thisExp.addData(‘thisA’,thisA) to select and record the value being used.

Why do you have 100 spreadsheets?

Sorry, I was referring to over 100 sound files and images. Ideally, I’d use only one excel file.

I’ve just written a demo called Independent Randomisation that should help. [image] PsychoPy Online Demos Blog If you have routines or experiments that are likely to be useful to others, please create a post in this thread, editing your post to add new demos so there is on…

Thanks very much for creating this demo!! I’m sure it will help many other users too. I’ve got a question and am receiving an error message when trying it out. First, my error: listA.append(str(int(grid))) ValueError: invalid literal for int() with base 10: ‘myimage.png’ I suppose I’m receiving…

So, it is kind of working for me - the sound and image do not appear in the same combinations anymore. :partying_face: However, the images (grid - what I put in the place of your colA) always occurs in the same order. I suppose this is simply how your code works (while the one column is randomized…

Check that both of your loops are set to random. Mine are.

Yes, all of my loops are set to random. I also tried using your experiment and simply loading in my conditions file and changing colA to grid, etc. and have the same result.

Sorry - false alarm! For whatever reason, it’s working now. Thank you very much!

Simultaneously randomize two columns in conditions file

Builder

wakecarter April 27, 2021, 7:41pm 4

I’ve just written a demo called Independent Randomisation that should help.

Topic		Replies	Views
Randomizing two lists in one loop Builder randomization	2	2015	February 15, 2024
Make the pictures in the condition file individually random Coding	1	389	December 3, 2022
Randomizing each column separately Online experiments randomization	6	660	July 21, 2021
Independent randomisation of parameters in PsychoPy? Builder	4	1724	July 10, 2018
Shuffle one column in conditions file, and shuffle two columns together Builder	3	551	October 18, 2023

Simultaneously randomize two columns in conditions file

Related topics