[R] how to let R read different equations I write and execute it?

From: czqiu <zunqiu_at_hotmail.com>
Date: Sun, 9 Dec 2007 13:55:15 -0800 (PST)

Hello All,
I am a newcomer to R. Currently, I am trying to write an interactive code in R to let it read the equation which I write and execute the equation in a curve function.

For example: I want to plot curve by using: curve (equation, -2,2, n=1000) what I want is that the R code ask me what equation I want to use (which I know how to write this code):
then, I type for example 3*x.

then 3*x will be assigned to the 'equation' (I don't know how to do this step)
then curve function will work to plot.

but I dont' know how I can let the equation to be read in and assigned to equation.
I know how to do this kind of thing for numerical values but not for logical equations.

Anyone can help out?

thanks a lot!
czqiu

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Received on Mon 10 Dec 2007 - 09:37:01 GMT

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