Mathematical coding help

[wakecarter]

I thought I’d seen this before.

New to PsychoPy: Coding for shapes, breath pacer stimulus

Hello, I am trying to create a task that uses a circle to mimic a breathing pacer. So a circle that slowly grows bigger in size (inflation) and then slowly shrinks in size (deflation). I am hoping to modify the rate of this rhythm. At the moment, I am using this equation in the coder: inflate = P*sin((1/M)*t) “Inflate” is the name I have given the circle P = size of the circle N = time to get to maximum circle size If I use this equation; inflate = 20*sin((1/2)*t); it produces an inflatio…

Does a of 1.5 and b of -0.7 give you about what you need?