<table cellspacing='0' cellpadding='0' border='0' ><tr><td valign='top' style='font: inherit;'><P>Dear all users,</P>
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<P>Please. Statistical significance scripts calculate the <I>t-test statistic</I> for a <I>two-sample difference of means test </I>and shade the grid cells that are significant at a chosen level. I have two data file with extensions *.nc. When run scripts in GrADS the error message is undefined grid contours. My firts conclusion is that them point of grid of the archives is not identical, in such sense, That I can do?????????????????</P>
<P>Yours Faithfully,</P>
<P>Andreas</P>
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