Why PlotLegend is an unknown option in Mathematica 6.0? -


i want have plotlegend in top-right corner of plot, option not work.

how can add plotlegend plot? should 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]"}]

plotlegend has (at least since 2.2) been loaded through add-on package.

upgrade if want, loading legends using needs["plotlegends`"] should trick.


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