In input of plt, pltz, pltt and plt1d, it check that the field give a size compatible with the domain and, if needed, average to give us a 2d array if we make a plot of the type: 'xy', 'xz', 'xt', 'yz', 'yt' , 'zt' or a 1d array if we make a plot of the type: 'x', 'y', 'z', 't'.