Thank you for posting your question to the PTC Community. I have some clarifying questions that will help us direct this post to the right people.
Can you confirm if you are using ThingWorx Analytics Server application?
If yes, there are provided extensions with Mashups that display models generated using ThingWorx Analytics Server.
If you are using a 3rd Party application to create your model, you can import the PMML file as long as it adheres to the ThingWorx Analytics Server expected formats, but you will not be able to generate any charts or graphs using ThingWorx Analytics Extensions.
If you are talking about using some other form of "Analytics" and want to display your work in ThingWorx, this is not something I can assist with but can request someone to review this thread.
Please let us know which of the above you are requesting assistance on.