<!--Copyright (C) 1988-2005 by the Institute of Global Environment and Society (IGES). See file COPYRIGHT for more information.--> <h2><b>abs</b></h2><p> <code>abs(<i>expr</i>)</code><p> Takes the absolute value of the result of <code><i>expr</i></code>. Operates on both gridded and station data. Missing data values do not participate. <H3>Usage Notes</H3><P> <H3>Examples</H3><P>