Taking means over circles of the pole figure is not supported by a single command. However, assuming you have given an
odf you can do the following:
define a regular grid where you are going to evaluate the pole figure
evaluate the odf at this grid
pf = pdf(odf,Miller(0,0,1),r);
rehape it to have the azimuth angles as columns and the polar angles as rows
pf = reshape(pf,size(r)).' ;
take the mean over the azimuth angles
plot the result