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Transforming a string into a command

Victor 
I would like to make a string executable, e.g,

s<- "ln(a+b)"
a<-1
b<-2

???? execute string s to obtain ln(a+b) ????

How can I make it?

Ciao fron Rome
Vittorio

Thread (11 messages)

Victor Transforming a string into a command Nov 27 Michael Kao Transforming a string into a command Nov 27 andrija djurovic Transforming a string into a command Nov 27 Xu Wang Transforming a string into a command Nov 28 David Winsemius Transforming a string into a command Nov 28 Xu Wang Transforming a string into a command Nov 28 PIKAL Petr Transforming a string into a command Nov 29 PIKAL Petr Transforming a string into a command Nov 29 Jim Lemon Transforming a string into a command Nov 29 David Winsemius Transforming a string into a command Nov 29 Xu Wang Transforming a string into a command Nov 29