<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div dir="ltr" id="yui_3_16_0_1_1426438857993_2287">Hi all,</div><div id="yui_3_16_0_1_1426438857993_2324" dir="ltr">I have two .vtk files with two velocity fields. I would like to select the upper part (y>0) from one file and the lower part from the other one and then to merge them. Is it possible to do this? <br></div><div id="yui_3_16_0_1_1426438857993_2397" dir="ltr">Thank you,</div><div id="yui_3_16_0_1_1426438857993_2398" dir="ltr">E.<br></div></div></body></html>