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Unable to convert(x,y) to a number

URL of experiment:

Description of the problem:

I got a conversion problem. Please see the attached photo and excel file for your reference!
I added placement to stimuli list(excel file) and it contains (-0.4, 0) and (0.4, 0) to change position two image stimuli. But they can’t be converted as a number.
How can i fix this problem?
If you add comments, they would be really helpful!

image
ImageList.xlsx (19.2 KB)

The easiest way to fix this is to use separate columns for the x and y coordinates.

Thank you for all your help.
Columns for the X and Y coordinates were generated. i attached the stimuli list.
But error was still in my experiment… Could you review my code?

SmartSelectImage_2022-01-07-12-01-09
SmartSelectImage_2022-01-07-12-05-32
SmartSelectImage_2022-01-07-12-05-48
SmartSelectImage_2022-01-07-12-07-05

Your image doesn’t seem to include an extension. Offline, PsychoPy makes educated guesses but online you need to be explicit.

How can i include an extension. I can’t understand ‘extension’ meaning in this situation…ㅠ_ㅠ

Sorry – I meant a file extension such as .png or .jpg

The photo files are PNG files. But the errors still show up.