What does traceback do in R

This recipe explains what does traceback do in R

Recipe Objective

What does traceback do?

While writing code, we often come across some error. In R, we can also use the traceback () function, which returns us those functions and statements which were executed before the error occurred, hence the user just has to look for those functions executed before the error occurred and not all. The traceback () function helps the user to find where and why the error has occurred, which thus can help to debug the error and run the code smoothly. This recipe demonstrates an example of a trace back in R.

Step 1 - Define 2 vectors

a <- c(1,2,3,4,5) b <- c('a','b','c') print(a+b) # an error has occured and a traceback returns the summary of the error.

"Output of code:"
Error in a + b: non-numeric argument to binary operator
Traceback:

1. print(a + b

traceback(a+b) # can use the traceback() as well.

"Output of code using trcaeback():"
Error in a + b: non-numeric argument to binary operator
Traceback:

1. traceback(a + b)
2. .traceback(x, max.lines = max.lines)
3. .is.positive.intlike(x)

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