Dear NCL,<div><br></div><div>may i have your suggestions,. i have two monthly nc files lets say A[time,lat] and B[time,lat]. I woudl like to calculate the statistically significant differences usinh ttest and plot them XY, where Y is latitude and X is time (month,1-12). What an efficient way to do that? do i have to repeat 12times ttest (mean,variance and df) following the time span? is there any trick? </div>
<div><br></div><div>Thanks a lot.</div><div>Chang</div>