[ESS] cat a "\n" when ess-eval-visibly-p is nil?

[Vitalie Spinu]

Hi Feng,

That has been annoying me for years, but it never occurred to me to
try to do something about it.

I have just implemented this (very) desirable behavior in ess-tracebug
(http://code.google.com/p/ess-tracebug/).

Executing

head(iris)
str(iris)
system.time(Sys.sleep(1))

outputs:

>
  Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1          5.1         3.5          1.4         0.2  setosa
2          4.9         3.0          1.4         0.2  setosa
3          4.7         3.2          1.3         0.2  setosa
4          4.6         3.1          1.5         0.2  setosa
5          5.0         3.6          1.4         0.2  setosa
6          5.4         3.9          1.7         0.4  setosa
>
'data.frame':	150 obs. of  5 variables:
 $ Sepal.Length: num  5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9 ...
 $ Sepal.Width : num  3.5 3 3.2 3.1 3.6 3.9 3.4 3.4 2.9 3.1 ...
 $ Petal.Length: num  1.4 1.4 1.3 1.5 1.4 1.7 1.4 1.5 1.4 1.5 ...
 $ Petal.Width : num  0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.2 0.2 0.1 ...
 $ Species     : Factor w/ 3 levels "setosa","versicolor",..: 1 1 1 1
1 1 1 1 1 1 ...
> +
   user  system elapsed
  0.004   0.000   1.001
>

instead of the default

> >   Sepal.Length Sepal.Width Petal.Length Petal.Width Species
1          5.1         3.5          1.4         0.2  setosa
2          4.9         3.0          1.4         0.2  setosa
3          4.7         3.2          1.3         0.2  setosa
4          4.6         3.1          1.5         0.2  setosa
5          5.0         3.6          1.4         0.2  setosa
6          5.4         3.9          1.7         0.4  setosa
> 'data.frame': 150 obs. of  5 variables:
$ Sepal.Length: num  5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9 ...
$ Sepal.Width : num  3.5 3 3.2 3.1 3.6 3.9 3.4 3.4 2.9 3.1 ...
$ Petal.Length: num  1.4 1.4 1.3 1.5 1.4 1.7 1.4 1.5 1.4 1.5 ...
$ Petal.Width : num  0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.2 0.2 0.1 ...
$ Species     : Factor w/ 3 levels "setosa","versicolor",..:
>    user  system elapsed
 0.000   0.000   1.003


Here is how to do it if you are not using ess-tracebug:

(defun inferior-ess-output-filter (proc string)
  (let ((pbuf (process-buffer proc))
        (pmark (process-mark proc))
        (prompt-regexp "^>\\( [>+]\\)*\\( \\)$")
        (prompt-replace-regexp "^>\\( [>+]\\)*\\( \\)[^>+\n]"))
    (setq string (replace-regexp-in-string prompt-replace-regexp " \n"
string nil nil 2))
    (with-current-buffer pbuf
      (goto-char pmark)
      (beginning-of-line)
      (when (looking-at prompt-regexp)
        (goto-char pmark)
        (insert "\n")
        (set-marker pmark (point)))
      ))
  (comint-output-filter proc (inferior-ess-strip-ctrl-g string)))

This is R specific and might interfere with other languages.

Cheers,
Vitalie.


On Wed, Oct 19, 2011 at 8:18 PM, Feng Li <m at feng.li> wrote:
> Hi folks,
>
> Is it possible to cat a newline (\n) after each evaluation when
> ess-eval-visibly-p is nil ? It does not look nice if I have the print or cat
> function in my code. See this example of output with ESS 5.14,
>
>> > + + + + + + + + + + + + + + + + + + + + > >    user  system elapsed
>  1.528   0.012   1.548
>
> I would like to have something like
>
>> > + + + + + + + + + + + + + + + + + + + + > >
>   user  system elapsed
>  1.528   0.012   1.548
>
> Thanks!
>
>
>
> Feng
>
> --
> Feng Li
> Department of Statistics
> Stockholm University
> 106 91 Stockholm, Sweden
> http://feng.li/
>
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