How do I make newly named objects also appear in console as output when running?

RStudio IDE
1

Relatively new to R as it's in our uni course so I'm just getting started, but I've noticed that our tutor's version displays the values of named objects when run and I wish that could be the case for me too because it makes it easier to quickly view the output instead of having to look through all objects.

an example of what I have to do to get objects to show up in console when running from a script:

t.stat<-diffy1y2/SE
t.stat
[1] 4.341755

using version 1.2.5001 on mac

2

If your goal is to avoid typing the second line of code

t.stat<-1.96
t.stat

or

t.stat <- 1.96
print(t.stat)

you can enclose your first statement in parentheses, as in

(t.stat<-1.96)

and it will print the result

3

This works, thanks! Though I thought there was a setting I could enable that did this automatically without writing the parentheses but this works as a temporary thing.

4

As a general rule, if you assign something to an object, the default is not to print.
If you do not finish a pipe with an assignment, it will print.

For example

library(tidyverse)
iris %>% 
  select(starts_with("Sepal")) %>% 
  head()
#>   Sepal.Length Sepal.Width
#> 1          5.1         3.5
#> 2          4.9         3.0
#> 3          4.7         3.2
#> 4          4.6         3.1
#> 5          5.0         3.6
#> 6          5.4         3.9

Created on 2019-11-06 by the reprex package (v0.3.0)

will print the resulting dataset
But this version

library(tidyverse)
iris %>% 
  select(starts_with("Sepal")) %>% 
  head() ->
sepals

Created on 2019-11-06 by the reprex package (v0.3.0)

will not.

But this (with parentheses) will print

library(tidyverse)
(iris %>% 
  select(starts_with("Sepal")) %>% 
  head() ->
sepals)
#>   Sepal.Length Sepal.Width
#> 1          5.1         3.5
#> 2          4.9         3.0
#> 3          4.7         3.2
#> 4          4.6         3.1
#> 5          5.0         3.6
#> 6          5.4         3.9

Created on 2019-11-06 by the reprex package (v0.3.0)

5

Just for impish fun that nobody should attempt in anything important:

# Not a good idea!
`<-` <- function(x, value) {
  assign("x", substitute(x))
  if (is.symbol(x)) {
    assign("x", deparse(x))
  }
  assign("env", parent.frame())
  assign(x, value, envir = env)
  print(value)
  invisible(value)
}

a <- 2
# [1] 2
a
# [1] 2
b <- 1 + 2 + 3
# [1] 6
b
# [1] 6