How to get the source code for the assignment of a variable?

djhurio wrote:

I believe there is not such thing as source code for a variable. I believe
if you define x=y*y, x is keeping only the values of y*y, but not how they
were computed. Am I right?

In general yes. ?Basic variables do not store a copy of the function call
that created them.

However, some objects have been build to store a memory of how they were
created. ?Take for example a linear model:

? ?model <- lm( demand ~ Time, data = BOD )

One of the components of the `model` variable is called call and it stores a
language object that is a copy of the lm function call that was used to
generate `model`:

model$call

lm(formula = demand ~ Time, data = BOD)

This object could be passed to the eval() function to basically re-run the
operation that generated `lm`.

The str() function can be used to discover what sorts of tidbits may be
hiding inside a variable.