How do i change SNR to vector?

I am using Autometic modulation classification using deep learning example of MATLAB link is given below.

There they use on SNR = 30, but i want to generated dataset for SNR = -10:2:30 but i got error that expected SNR input to be a Scalar.

Link of example i am using

https://www.mathworks.com/help/deeplearning/ug/modulation-classification-with-deep-learning.html