How to plot using logaritmic scale, for given points?

I have done a few runs in MATLAB and gotten different values depending on the number of iterations. I would like to display these values using a log- scale graph

I have two sets of values

 y1=[17.5,30,74.8,98.1,100,100];
 y2=[5.6,8,12.1,19.7,28,72.1];

given at the iterations points

x=[50,100,200,500,1000,10000];

I have looked at the semilog function- but how should I set it up?

[Rik]

Have you read the documentation? If you did, what didn't you understand?

Answer 1

[Walter Roberson]

semilogy(x, y1, x, y2)