RStudio 1.1.453 - Windows 10 - How to see detailed results of every calculation step

Hello,

First of all welcome to R, I hope you enjoy it and that as you go along
it will give less and less troubles.

Now, why would length(56) return 2? It's just one number, a vector of
length 1.

Start by trying it at an R prompt and see the result.

Hope this helps,

Rui Barradas

?s 16:07 de 27-07-2018, ??????? ???? Ibrauheem Khat'taub escreveu:

Hi everyone,

I am taking my first R course. This was my first example.

When I executed:

AddLengthNoise <- function(x) {x + rnorm(length(x))}

using 56 as the value of x, I expected the result to be two values,
something like:

[1] 56.17491697 56.02935105

because I expected rnorm to return two values and then 56 to be added to
each of them. Instead, I got one value, something like:

[1] 56.17491697

So I wondered how this happened and wanted to see what happens behind the
scene. Coming from the Excel paradigm, I wondered, "Is there something

like

'show calculation steps' in R?" So I Googled it, and got nothing related
but this
<

https://support.rstudio.com/hc/en-us/articles/205612627-Debugging-with-RStudio

.
So, I tried breaking my code into separate lines and toggling breakpoints
at all lines, as follows:

6| AddLengthNoise <- function(x) {

    - 7| x +
    - 8| rnorm(
    - 9| length(
    - 10| x)
    - 11| )
    - 12| }

(Where the bullet points above represent the red debugging checkpoints)

Then I tried again:

AddLengthNoise(56)

and as I executed step by step, I could not see what I expected. I

couldn't

see each step's result, and I did not understand what I saw neither in

the

console nor in the "Traceback" window that appeared.

My 2 questions:

    1. Did I do something wrong?
    2. Is there a way to see, like in Excel's "Show calculation steps",

the

    result of each step alone (i.e. length(56)=2 ==>

rnorm(2)={0.17491697;

    0.02935105} ==> 56 + {0.17491697; 0.02935105}= ... and so on)?

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