<div dir="ltr"><div><div><div>Hello Nitin, <br><br>1. I have plotted trend of sst/112 years (trend_yearly.ncl) and is working fine, <b>In this I have to show only the trend which is 95% significant, anyone knows?</b><br><div><br>- You can use several statistical tests to test the significance of the trend depending in your data. One of them is the Mann-Kendall non-parametric trend test. See <a href="https://www.ncl.ucar.edu/Document/Functions/Built-in/trend_manken.shtml">https://www.ncl.ucar.edu/Document/Functions/Built-in/trend_manken.shtml</a> for the description. Calculate the p value and if it is less than 0.05 then the trend is significant. You can plot the trend and then overlay with the p values (see <a href="https://www.ncl.ucar.edu/Applications/Scripts/overlay_5.ncl">https://www.ncl.ucar.edu/Applications/Scripts/overlay_5.ncl</a> <a href="https://www.ncl.ucar.edu/Applications/Images/overlay_5_lg.png">https://www.ncl.ucar.edu/Applications/Images/overlay_5_lg.png</a> ). <br><br></div><div></div>2.
I am trying to plot trend (trend_jjas.ncl) as per above but on seasonal
basis (JJAS) but it is showing some seasonal error, Kindly let me know <b>how to compute seasonal trend JJAS (How to select JJAS per year?).</b><br></div><br> - Without knowing what exactly the seasonal error is make it difficult to help. <br></div>Or what you can do is to create a new file containing only JJAS (you can use cdo) and do the trend calculation using trend_yearly.ncl. <br><br>If you have any further questions please respond to the ncl-talk list.<br></div>Izidine <br><div><div><div><div><br></div></div></div></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><font style="font-family:courier new,monospace;background-color:rgb(255,255,255);color:rgb(153,153,153)" size="1"><br><span style="color:rgb(51,51,51)">Izidine S. Pinto</span><br style="color:rgb(51,51,51)"><span style="color:rgb(51,51,51)"></span></font><br>
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<br><div class="gmail_quote">On 7 September 2015 at 13:38, Nitin Patil <span dir="ltr"><<a href="mailto:nitinpatil85@gmail.com" target="_blank">nitinpatil85@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Dear NCL user's,<br><br></div>1. I have plotted trend of sst/112 years (trend_yearly.ncl) and is working fine, <b>In this I have to show only the trend which is 95% significant, anyone knows?</b><br><div><br></div><div>2. I am trying to plot trend (trend_jjas.ncl) as per above but on seasonal basis (JJAS) but it is showing some seasonal error, Kindly let me know <b>how to compute seasonal trend JJAS (How to select JJAS per year?).</b><br><br></div><div><b>Note:</b> My data file looks like: SST monthly Jan 1901 to Dec 2012.<br></div><div><br clear="all"><div><div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>--</div>Regards,<div>Nitin Patil</div></div></div></div></div></div></div></div></div></div>
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