<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Dear NCL users<div><br></div><div>I got cross correlation between two variables (two dimensions: lat, time and at lag 0) using escorc function then did rtest and ttest. I did rtest first and then used the equation</div><div><span style="background-color: rgb(255, 255, 255); line-height: 16px;">t = </span><em style="line-height: 16px; margin: 0px; padding: 0px;">r</em><span style="background-color: rgb(255, 255, 255); line-height: 16px;">*sqrt((</span><em style="line-height: 16px; margin: 0px; padding: 0px;">Nr</em><span style="background-color: rgb(255, 255, 255); line-height: 16px;">-2)/(1-</span><em style="line-height: 16px; margin: 0px; padding: 0px;">r^2</em><span style="background-color: rgb(255, 255, 255); line-height: 16px;">))</span></div><div>to do ttest. Is it correct way to do ttest? </div><div> </div><div>If it is not should I use ttest function separately from rtest?</div><div><br></div><div>Thank you in advance,</div><div>Sun-</div><div> </div></body></html>