diff --git a/module2/exo3/exercice_R_en.org b/module2/exo3/exercice_R_en.org
index 2b73d64e82dad485ab562f8bda6434ffa7b68d27..786e917a478429265fb5023e792ddfb6130bf306 100644
--- a/module2/exo3/exercice_R_en.org
+++ b/module2/exo3/exercice_R_en.org
@@ -11,71 +11,129 @@
#+HTML_HEAD:
#+HTML_HEAD:
-* Some explanations
-
-This is an org-mode document with code examples in R. Once opened in
-Emacs, this document can easily be exported to HTML, PDF, and Office
-formats. For more information on org-mode, see
-https://orgmode.org/guide/.
-
-When you type the shortcut =C-c C-e h o=, this document will be
-exported as HTML. All the code in it will be re-executed, and the
-results will be retrieved and included into the exported document. If
-you do not want to re-execute all code each time, you can delete the #
-and the space before ~#+PROPERTY:~ in the header of this document.
-
-Like we showed in the video, R code is included as follows (and is
-exxecuted by typing ~C-c C-c~):
-
-#+begin_src R :results output :exports both
-print("Hello world!")
-#+end_src
+* Data :noexport:
+#+Begin_src R :session *R* :exports none
+data <- c(14.0, 7.6, 11.2, 12.8, 12.5, 9.9, 14.9, 9.4, 16.9, 10.2, 14.9, 18.1, 7.3, 9.8, 10.9,12.2, 9.9, 2.9, 2.8, 15.4, 15.7, 9.7, 13.1, 13.2, 12.3, 11.7, 16.0, 12.4, 17.9, 12.2, 16.2, 18.7, 8.9, 11.9, 12.1, 14.6, 12.1, 4.7, 3.9, 16.9, 16.8, 11.3, 14.4, 15.7, 14.0, 13.6, 18.0, 13.6, 19.9, 13.7, 17.0, 20.5, 9.9, 12.5, 13.2, 16.1, 13.5, 6.3, 6.4, 17.6, 19.1, 12.8, 15.5, 16.3, 15.2, 14.6, 19.1, 14.4, 21.4, 15.1, 19.6, 21.7, 11.3, 15.0, 14.3, 16.8, 14.0, 6.8, 8.2, 19.9, 20.4, 14.6, 16.4, 18.7, 16.8, 15.8, 20.4, 15.8, 22.4, 16.2, 20.3, 23.4, 12.1, 15.5, 15.4, 18.4, 15.7, 10.2, 8.9, 21.0)
+#+End_src
#+RESULTS:
-: [1] "Hello world!"
-
-And now the same but in an R session. This is the most frequent
-situation, because R is really an interactive language. With a
-session, R's state, i.e. the values of all the variables, remains
-persistent from one code block to the next. The code is still executed
-using ~C-c C-c~.
-
-#+begin_src R :results output :session *R* :exports both
-summary(cars)
-#+end_src
+| 14 |
+| 7.6 |
+| 11.2 |
+| 12.8 |
+| 12.5 |
+| 9.9 |
+| 14.9 |
+| 9.4 |
+| 16.9 |
+| 10.2 |
+| 14.9 |
+| 18.1 |
+| 7.3 |
+| 9.8 |
+| 10.9 |
+| 12.2 |
+| 9.9 |
+| 2.9 |
+| 2.8 |
+| 15.4 |
+| 15.7 |
+| 9.7 |
+| 13.1 |
+| 13.2 |
+| 12.3 |
+| 11.7 |
+| 16 |
+| 12.4 |
+| 17.9 |
+| 12.2 |
+| 16.2 |
+| 18.7 |
+| 8.9 |
+| 11.9 |
+| 12.1 |
+| 14.6 |
+| 12.1 |
+| 4.7 |
+| 3.9 |
+| 16.9 |
+| 16.8 |
+| 11.3 |
+| 14.4 |
+| 15.7 |
+| 14 |
+| 13.6 |
+| 18 |
+| 13.6 |
+| 19.9 |
+| 13.7 |
+| 17 |
+| 20.5 |
+| 9.9 |
+| 12.5 |
+| 13.2 |
+| 16.1 |
+| 13.5 |
+| 6.3 |
+| 6.4 |
+| 17.6 |
+| 19.1 |
+| 12.8 |
+| 15.5 |
+| 16.3 |
+| 15.2 |
+| 14.6 |
+| 19.1 |
+| 14.4 |
+| 21.4 |
+| 15.1 |
+| 19.6 |
+| 21.7 |
+| 11.3 |
+| 15 |
+| 14.3 |
+| 16.8 |
+| 14 |
+| 6.8 |
+| 8.2 |
+| 19.9 |
+| 20.4 |
+| 14.6 |
+| 16.4 |
+| 18.7 |
+| 16.8 |
+| 15.8 |
+| 20.4 |
+| 15.8 |
+| 22.4 |
+| 16.2 |
+| 20.3 |
+| 23.4 |
+| 12.1 |
+| 15.5 |
+| 15.4 |
+| 18.4 |
+| 15.7 |
+| 10.2 |
+| 8.9 |
+| 21 |
+
+* Line plot
+In order to plot with the lines, we need to specify the argument =type=.
+
+#+Begin_src R :results output graphics file :file "./lines.png" :exports results :width 600 :height 400 :session *R*
+plot(data, type="l")
+#+End_src
#+RESULTS:
-: speed dist
-: Min. : 4.0 Min. : 2.00
-: 1st Qu.:12.0 1st Qu.: 26.00
-: Median :15.0 Median : 36.00
-: Mean :15.4 Mean : 42.98
-: 3rd Qu.:19.0 3rd Qu.: 56.00
-: Max. :25.0 Max. :120.00
+[[file:./lines.png]]
-Finally, an example for graphical output:
-#+begin_src R :results output graphics :file "./cars.png" :exports results :width 600 :height 400 :session *R*
-plot(cars)
-#+end_src
+* Histogram
+For the histogram, we need to use =hist=:
-#+RESULTS:
-[[file:./cars.png]]
-
-Note the parameter ~:exports results~, which indicates that the code
-will not appear in the exported document. We recommend that in the
-context of this MOOC, you always leave this parameter setting as
-~:exports both~, because we want your analyses to be perfectly
-transparent and reproducible.
-
-Watch out: the figure generated by the code block is /not/ stored in
-the org document. It's a plain file, here named ~cars.png~. You have
-to commit it explicitly if you want your analysis to be legible and
-understandable on GitLab.
+#+Begin_src R :results output graphics file :file "./hist.png" :exports results :width 600 :height 400 :session *R*
+hist(data)
+#+End_src
-Finally, don't forget that we provide in the resource section of this
-MOOC a configuration with a few keyboard shortcuts that allow you to
-quickly create code blocks in R by typing ~