How do I plot the number of iterations of a function using Semilogx?

I have no clue how to do this

Answer 1

[Walter Roberson]

for K = 1 : length(X)
  numiters(K) = SomeFunctionToDetermineTheIters(X(K));
end
semilogx(X, numiters);

[Kevin Junior]

whats X in this case?