Well, we don't know what 'not able to get imagesc to work right' means? Do you get an error? A blank image? The wrong image? Something else?
The output of the load function is a struct though, so you can't pass that directly to imagesc. At a guess I would imagine that is the problem you are having.
There should be a field on Z which contains your image. Pass that to imagesc instead
e.g.
imagesc( Z.someFieldName )
