error in plotting histogram

I have to plot histogram

i have months (jan-dec) in x axis and 12 values in y axis

if i plot hist(x,y)

i get error

Error using ==> hist at 45 Input arguments must be numeric.

Error in ==> gra at 22 hist(GD, month)

please help

Answer 1

[Walter Roberson]

Sorry, my earlier answer was wrong. In order to solve this matter, we need to know exactly what data type GD and month are, and what it is that you want plotted on which axes, and how you want the axes labeled.

You should also consider whether hist() is really appropriate for this task or if you should be using histc() instead.