can you tell me what is this problem??

The following error occurred converting from sym to double:

Unable to convert expression into double array.

Error in Toppling_PMA (line 650)

YwL(i)=(YwR(i-1))

Answer 1

[Image Analyst]

I think you can just not instatiate YwR as sym. Use zeros() instead to instantiate it.

YwR = zeros(1, numberOfElements);