Can I invert the -z (--root) filtering?

[cbuchner1]

Instead of showing just the selected root node and its descendents, can gprof2dot allow for a negation
of the provided filters, by showing exactly the opposite set of nodes?

I am really interested in viewing in the graph, but without the specified subgraph.

[jrfonseca]

I'm afraid such option doesn't exist. Looking at the source it's not trivial to invert the selection either.

Have you looked into -p/--paths option?