Only x-axis in log scale?

Hi all,

I am using semilogx to plot the following - and it doesn't work, i.e. I still end up with a standard scale for the x-axis...

Xaxis=[0:0.0001:1];
Yaxis=pi.*((1/0.4445).*Xaxis).^(2/5);

figure(1)
semilogx(Xaxis,Yaxis,'r-');

Can anyone help?

Many thanks,
IC