R help - Aug 2012 - how to convert variable name to string?

Hi there,

In the following function:

demo.plot <- function( obj ) plot(1:5, obj, xlab = "x")

Then, I use this function as following:

y <- rnorm(5)
demo.plot(y)

It will produce a plot with ylab = "obj", however, I hope to get a
plot
with ylab = "y".

Is it possible to convert object/variable name y to a string "y", so I
can set it in demo.plot():

demo.plot <- function( obj ){
    lab.y <- obj.name.2.string(obj) #### I need obj.name.2.string()
    plot(1:5, obj, xlab = "x", ylab = lab.y)
}

I don't know how to define the function obj.name.2.string.

Any suggestion will be greatly appreciated.

Regards,
Jinsong

On Aug 14, 2012, at 16:54 , Jinsong Zhao wrote:
> Hi there,
> 
> In the following function:
> 
> demo.plot <- function( obj ) plot(1:5, obj, xlab = "x")
> 
> Then, I use this function as following:
> 
> y <- rnorm(5)
> demo.plot(y)
> 
> It will produce a plot with ylab = "obj", however, I hope to get
a plot with ylab = "y".
> 
> Is it possible to convert object/variable name y to a string "y",
so I can set it in demo.plot():
> 
> demo.plot <- function( obj ){
>   lab.y <- obj.name.2.string(obj) #### I need obj.name.2.string()
>   plot(1:5, obj, xlab = "x", ylab = lab.y)
> }
> 
> I don't know how to define the function obj.name.2.string.
> 
> Any suggestion will be greatly appreciated.
The standard trick involves deparse(substitute(....)). Take a look inside
plot.default.

> 
> Regards,
> Jinsong
> 
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