lr

• Finally, the output is printed:

        print "Xmean $Xm\n"      if $V{Xm};
        print "Ymean $Ym\n"      if $V{Ym};
        print "Xvariance $Xv\n"  if $V{Xv};
        print "Yvariance $Yv\n"  if $V{Yv};
        print "Xstddev $Xs\n"    if $V{Xs};
        print "Ystddev $Ys\n"    if $V{Ys};
        print "Slope $m\n"       if $V{m};
        print "Intercept $b\n"   if $V{b};
        print "Correlation $r\n" if $V{r};

• Wait, what is %V?

• That's the command-line option

• You can say lr -mean and get just the means

• Or lr -line and get just the linear regression stuff

• Or lr -Xm -Xv and get just the mean and variance of the x values

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Copyright © 2005 M. J. Dominus