How can I fix my plots?

Please refer to the code included below, which aims to plot the transient response, velocity and acceleration of a SDOF system based on the Convolution integral solution for a half-sine pulse excitation.

The above code results in the plots below. Can anyone please tell me why I am obtaining these gray boxes on my graphs and what I can do to remove them and see my curves?

Thank you!

Answer 1

[Alberto Mora]

Hello, few notes:

• Please, insert the code as TEXT (in the proper 'code' format), not as an image, otherwise it is difficult to help you with modification of your own code
• Try to enlarge the figure in full-screen, and upload the image.