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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hi All NCL Users
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<div>I have created a plot with ship tracks as dots and winds overlaid over them.</div>
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<div>I wanted to join the last 5 points (i.e. ship tracks) so that I can create a trail of where the ship had been the last 5 timesteps.</div>
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<div>I am not sure how to do it. I have used this if statement but it does not create any lines between the last 5 points of the ship tracks?</div>
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<div>If statement to create lines between the last 5 ship dots:</div>
<div>if(dimsizes(nh).le.5)then ;where nh is the loop for the number of hours for the ship tracks</div>
<div>gsn_polyline(wks,plot,lon(indexes),lat(indexes),gres)</div>
<div> end if</div>
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<div>Many thanks in advance.</div>
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<div>Kindest Regards</div>
<div>Melissa</div>
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