how can i solve the question, Array dimensions must match for binary array op.

i am asking for help fixing the error: Array dimensions must match for binary array op. i attached the matlab code, the sample ncdata file and the kind of image iam trying to plot. please can someane help me?

[Gentil Mabote]

i will be verry glade for the help please, i am in the finally phase of my work of the end of the Course.