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I want to have a PlotLegend in the top-right corner of the plot, but this option does not work.
How can I add PlotLegend into my Plot? Should I buy Mathematica 8?
u=Sech[x];
w=Cos[x];
v=Sin[x]^2;
Plot[{u,w,v},{x,-5,5},PlotStyle->{Automatic,Dashed,DotDashed},
PlotLegend->{"Sech[x]","Cos[x]","Sin[x]"}]
PlotLegendhas always (at least since 2.2) been loaded through an add-on package.Upgrade if you want, but loading legends using
Needs["PlotLegends`"]should do the trick.