r - Using a parameter for expression function -

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I am trying to plot a narrative which I created with the expression function Is where logic for expression is a character that I want to plot as a Greek letter symbol.

Here is an example of what I tried, which clearly does not work: 

  param = "tau" tau.vec = c (1,2) , 3,4) conspiracy (Tau.Weck, Tau.Weck) Legend ("bottom", sapply (Tau.Wacee, Function (X) expression

How should I consider any

try it 

 < Code> param = as.symbol ("tau") tau.vec = c (1,2,3), 4) conspiracy (Tau.Weck, Tau.Weck) Legend ("Talima", as .expression (sapply) (Tau.vec, function (x) bquote (. (Param) ==. (X) ))))

Expression () does not allow variable values ​​to be avoided, bquote () to () syntax.


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