Session {methods} | R Documentation

## Deprecated: Session Data and Debugging Tools

### Description

The functions `traceOn` and `traceOff` have been replaced by extended versions of the functions `trace` and `untrace`, and should not be used.

### Usage

    sessionData()

    traceOn(what, tracer=browseAll, exit=NULL)

    traceOff(what)

    browseAll()

### Details

`sessionData`:

  return the index of the session data in the search list, attaching it if it is not attached.

`traceOn`:

  initialize tracing on calls to function `what`. The function or expression `tracer` is called on entry, and the function or expression `exit` on exit.

`traceOff`:

  turn off tracing of this function.

`browseAll`:

  browse the current stack of function calls.

  Uses the function `debugger` to set up browser calls on the frames. On exit from that function, computation continues after the call to `browseAll`. Computations done in the frames will have no effect.

### References

Chambers, John M. (2008) Software for Data Analysis: Programming with R Springer. (For the R version.)

Chambers, John M. (1998) Programming with Data Springer (For the original S4 version.)

[Package methods version 2.15.1 Index]