How to shift over an auto generated x-axis?

For one of my classes we had to create 19 different data sets and graph groups of them together to compare and contrast. I am using the code

>> plot(run1.signals.values(:,5))

to do this for each run. As you can see from the screenshot the graph needs to be shifted over. I don't know how to go about doing this since doing >> plot(run1.signals.values(:-500,5)) results in an error. It seems like there is never an easy way to shift over plots in matlab.