Split Code Over Multiple Lines in an R Script

Split code over multiple lines in an R script

You are not breaking code over multiple lines, but rather a single identifier. There is a difference.

For your issue, try

R> setwd(paste("~/a/very/long/path/here",
               "/and/then/some/more",
               "/and/then/some/more",
               "/and/then/some/more", sep=""))

which also illustrates that it is perfectly fine to break code across multiple lines.

How to split the code over several lines in R Studio

If we want to run iin multiple lines, use, just split after the [ (also the + may be the artifact from copying the code from console)

unique(c(as.character(prep$player1), as.character (prep$player2)))[
  !unique(c(as.character(prep$player1),
       as.character (prep$player2)))%in% results$names]

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In R 4.1.0, we can also use |> for chaining

unique(c(as.character(prep$player1), as.character (prep$player2))) |>
   {\(dt) dt[!unique(c(as.character(prep$player1), 
            as.character (prep$player2)))%in% results$names]}()      

Run code spread over multiple lines in single keystroke [r]

The preview version of RStudio is a lot smarter about statement execution. Ctrl+Enter (or Cmd+Enter on OS X) will execute your whole statement no matter how many lines it's spread over. You can download the preview here:

https://www.rstudio.com/products/rstudio/download/preview/

This should get you down to two or three keystrokes.

If you want to do it with a single keystroke, you can annotate the code with a section header and then use RStudio's Run Code Section command. More on that here:

https://support.rstudio.com/hc/en-us/articles/200484568-Code-Folding-and-Sections

How to continue to the next line in R?

well...

tmp   =  (-0.00773 + 1.5657  -0.9391  + 
            0.4753   - 0.1019   -0.00495)

Fastest way to edit multiple lines of code at the same time

RStudio has support for multiple cursors, which allows you to write and edit multiple lines at the same time.

Example 1

You can simply click Alt on Windows/Linux (or option on Mac) and drag your mouse to make your selection, or you can use Alt+Shift to create a rectangular selection from the current location of the cursor to a clicked position.

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Example 2

Another multiple cursor option is for selecting all matching instances of a term. So, you can select names and press Ctrl+Alt+Shift+M. Then, you can use the arrow keys to move the cursors to delete the space and add in the parentheses.

Syntax in R for breaking up LHS of assignment over multiple lines

You can put a line break between any 2 characters that aren't part of a name, and that doesn't leave a syntactically complete expression before the line break (so that the parser knows to look for more). None of these look great, but basically after any [[ or $ or before ]] you can put a line break. For example:

results$
  cases[[i]]$
    samples[[j]]$
      portions[[k]]$
        analytes[[l]]$
          column <- x

Or going to the extreme, putting in every syntactically valid line break (without introducing parentheses which would let you do even more):

results$
  cases[[
    i
  ]]$
    samples[[
      j
    ]]$
      portions[[
        k
      ]]$
        analytes[[
          l
        ]]$
          column <-
            x

With parentheses, we lose the "doesn't leave a syntactically complete expression" rule, because the expression won't be complete until the parenthses close. You can add breaks anywhere except in the middle of a name (object or function name). I won't bother with nested indentation for this example.

(
  results
  $
  cases
  [[
    i
  ]]
  $
  samples
  [[
    j
  ]]
  $
  portions
  [[
    k
  ]]
  $
  analytes
  [[
    l
  ]]
  $
  column
  <-
  x
)

If you want to bring attention to the x being assigned, you could also use right assignment.

x -> results$cases[[i]]$samples[[j]]$
       portions[[k]]$analytes[[l]]$column

Is it possible to split the text of a gt spanner column over multiple lines?

Try this:

library(dplyr)
library(gt)

exibble %>%
    dplyr::select(date, time, char, row) %>%
    gt(rowname_col = "row") %>%
    tab_spanner(
        label = html("dates<br> and <br>times"),
        columns = c(date, time)
    ) 

How do I use multiple lines in the R command prompt

Use ;

x <- 1 + 2; x / 6
[1] 0.5

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