how to draw a historam plot and a normal plot (weibul PDF) plot combinely in one graph in MATLAB

I tired in but am not getting two different y axis, in one side only two y axis values are coming

[Image Analyst]

Show how you called histogram(), or plotyy() or both.

[Harish Pulluri]

size of v,fv varaibles are (365,1), samples=365; plotyy(v,fv,v,samples,'plot','hist') I am trying above command it shows some error, but in place of 'hist' function if I use 'stem' function the plot comes perfectly.