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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Just read an item from R bloggers today that mentioned a new package that does little but offer a simple game.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The game is called lights out and is playable in the R terminal. You start with a square grid of odd size, some of the elements in the matrix are ones and the others are zeroes (1 for on, 0 for off)<o:p></o:p></p>
<p class="MsoNormal">The aim is to get all the lights off. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It’s a nice little mathematical problem even though it looks utterly trivial. Not all game boards are guaranteed to be resolvable<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The full description is at:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://github.com/daattali/lightsout">https://github.com/daattali/lightsout</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">but the short version is:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Install the package using install.packages(“lightsout”)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Load the package using library(lightsout)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">3.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Get a new game board using something like game1=random_board(3) to generate a new puzzle of 3x3 size.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">4.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Use play(r,c) to toggle the light at row r and column c off/on which also toggles the adjacent lights (up to 4 of them)<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">5.<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>You can speed things up by using the pipe operator to combine multiple game1 %>% play(1,2) %>% play 3,3)
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Btw: I tried the web version (shiny app) and found it inaccessible. That is built on the command line version anyway so we only miss out on the interface not the game.<o:p></o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal">What I like is that it can be used to show a few things about R code and R structures. I can see myself using it as a teaching tool to bring people into R coding, not to mention the fact that it shows people that the back end can be converted
into a front end for that “modern” feel the vision-dependent crave.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Jonathan<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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