Displaying To File Data In a Plot

The Code I'm using:

p1a
sim('p1a');
load p1a %Also tried P1A = load('P1A.mat');

The Simulation: http://imgur.com/9JCPfMI

What I would like is for load to give me a structure in which I can reference fields (For example, P1A.t) to simply plot 2 things. The first being VS (Named in the simulation) versus time and also VC (Named in the simulation) versus time.

Matlab is instead giving me a 2x51 double that I'm having a hard time with. How can I make what I would like to happen happen>