<div dir="ltr">Dear All,<div>I attempted to plot climatological wind speed during 1979-2015. But I faced an error and have no idea from where this problem arose. ( I checked the NCL website but was not enough: <a href="https://www.ncl.ucar.edu/Document/Language/error_messages.shtml#AssignMismatch">https://www.ncl.ucar.edu/Document/Language/error_messages.shtml#AssignMismatch</a>  ).Please have a look at the attached script, error message, and data file. I also have another question, after having climatological wind, how can I have the result as nc file?</div><div>I am waiting for your helpful suggestions.</div><div>Many thanks in advance.</div><div></div><div class="gmail_chip gmail_drive_chip" style="width:396px;height:18px;max-height:18px;background-color:rgb(245,245,245);padding:5px;font-family:arial;font-weight:bold;font-size:13px;border:1px solid rgb(221,221,221);line-height:1"><a href="https://drive.google.com/file/d/1DAUj5O8_HRB80p6f2ieiubdjqGlUokTL/view?usp=drive_web" target="_blank" style="display:inline-block;max-width:366px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration-line:none;padding:1px 0px;border:none"><img style="vertical-align: bottom; border: none;" src="https://ssl.gstatic.com/docs/doclist/images/icon_10_generic_list.png"> <span dir="ltr" style="vertical-align:bottom;text-decoration:none">adaptor.mars.internal-1572848815.075499-2543-15...</span></a><img src="//ssl.gstatic.com/ui/v1/icons/common/x_8px.png" style="opacity: 0.55; cursor: pointer; float: right; top: -1px; display: none;"></div><div>, </div></div>