legend-inside tl /frame-color=Black title "Convex November 1-7 1989 Circadian" xrange -1.00000:24.0000 no-xlabel no-ylabel plot 'using.dat'@2:4 /legend="Logged in" /path-style impulses plot 'using.dat'@2:4 /legend="Logged in" /line-style no /marker Times