class: center, middle, inverse, title-slide # > 06 👩🎨 👨🔬 <br>> functional programming<br>> for artists (and scientists) ## 🔗 <a href="https://robust-tools.djnavarro.net">robust-tools.djnavarro.net</a> ### danielle navarro --- layout: true <div class="my-footer"> <span> <a href="https://robust-tools.djnavarro.net" target="_blank">robust-tools.djnavarro.net</a> </span> </div> --- class: middle, inverse ## https://github.com/djnavarro/ashtree --- class: middle background-image: url("img/scrawl_17-1000-400-100-5.png") background-size: cover .pull-left-wide[ .bigly-hotpink-text[scrawl]<br> .embolden[ ... that thing we did last time! 😄] ] --- class: middle background-image: url("img/scrawl_17-1000-400-100-5.png") background-size: cover <br><br><br><br><br><br> ## github.com/djnavarro/scrawl --- class: inverse .hand[our goals!] - write your own R functions - use functions to write a new generative art system - introduction to functional programming with "purrr" --- class: middle background-image: url("img/fern_20_13.png") background-size: cover .pull-left-wide[ .biggish-hotpink-text[flametree]<br> ] --- class: middle background-image: url("img/fern_21_13.png") background-size: cover <br><br><br><br><br><br><br><br><br><br> ## <span style="color:white;font-weight:800%">github.com/djnavarro/flametree</span> --- class: middle background-image: url("img/ashtree2.png") background-size: cover .pull-left-wide[ .biggish-hotpink-text[ashtree]<br> ] --- class: middle background-image: url("img/ashtree2.png") background-size: cover -- .pull-left-wide[ .bigly-hotpink-text[why?]<br> ] .pull-right[ <br><br> .embolden[ why write with functions?] ] --- class: middle - breaks code into meaningful chunks - breaks code into reusable chunks - assign helpful names to code chunks - separate user-relevant and internal code - building blocks for packages --- class: middle background-image: url("img/ashtree.png") background-size: cover .pull-left-wide[ .bigly-hotpink-text[how?]<br> ] .pull-right[ <br><br><br><br><br> .embolden[ how do we write R functions?] ] --- class: inverse, middle ## .hand[live coding #1...] --- class: inverse .hand[ Let's take a look at the structure of this function! ] <img src="img/function_00.png" width="668" /> --- class: middle background-image: url("img/ashtree3.png") background-size: cover .pull-left-wide[ .bigly-hotpink-text[what]<br> .embolden[ what are the parts of a function?] ] --- <img src="img/function_01.png" width="668" /> -- - functions are regular R objects - given a name using `<-` - arguments are "labels" for user input - return an object to the user --- <img src="img/function_02.png" width="668" /> -- - things in the function "body" are hidden - i.e. function runs in its own "environment" --- class: inverse, middle ## .hand[live coding #2...] --- class: middle background-image: url("img/ashtree6.png") background-size: cover --- class: inverse <img src="img/Relations1.png" width="712" /> --- class: inverse <img src="img/Relations2.png" width="712" /> --- class: inverse <img src="img/Relations3.png" width="712" /> --- class: inverse <img src="img/Relations4.png" width="712" /> --- class: inverse <img src="img/Grow1.png" width="712" /> --- class: inverse <img src="img/Grow2.png" width="712" /> --- class: inverse <img src="img/Grow3.png" width="712" /> --- class: inverse, middle ## .hand[sweetie, we need to talk...] ## .hand[...about iteration] --- class: inverse <img src="img/Tree1.png" width="712" /> --- class: inverse <img src="img/Tree2.png" width="712" /> --- class: inverse <img src="img/Tree3.png" width="712" /> --- class: inverse <img src="img/Tree4.png" width="712" /> --- background-color: #8B3A62 <img src="img/For1.png" width="712" /> --- background-color: #8B3A62 <img src="img/For2.png" width="712" /> --- background-color: #8B3A62 <img src="img/For3.png" width="712" /> --- background-color: #8B3A62 <img src="img/For4.png" width="712" /> --- background-color: #8B3A62 <img src="img/For5.png" width="712" /> --- background-color: #8B3A62 <img src="img/For6.png" width="712" /> --- background-color: #8B3A62 <img src="img/For7.png" width="712" /> --- background-color: #8B3A62 <img src="img/For8.png" width="712" /> --- background-color: #8B3A62 <img src="img/For9.png" width="712" /> --- background-color: #8B3A62 <img src="img/For10.png" width="712" /> --- background-color: #8B3A62 <img src="img/For11.png" width="712" /> --- background-color: #8B3A62 <img src="img/For12.png" width="712" /> --- background-color: #8B3A62 <img src="img/For13.png" width="712" /> --- background-color: #8B3A62 <img src="img/For14.png" width="712" /> --- background-color: #8B3A62 <img src="img/For15.png" width="712" /> --- background-color: #8B3A62 <img src="img/For16.png" width="712" /> --- background-color: #8B3A62 <img src="img/For17.png" width="712" /> --- background-color: #8B3A62 <img src="img/For18.png" width="712" /> --- class: inverse, middle ## .hand[ugh, feels so clunky.] ## .hand[surely there's a simpler way?] --- <img src="img/Map1.png" width="712" /> --- <img src="img/Map2.png" width="712" /> --- <img src="img/Map3.png" width="712" /> --- <img src="img/Map4.png" width="712" /> --- <img src="img/Map5.png" width="712" /> --- <img src="img/Map6.png" width="712" /> --- <img src="img/Map7.png" width="712" /> --- class: inverse, middle ## .hand[um... but...] ## .hand[that doesn't solve our problem!] --- .hand[Problem: grow_multi() doesn't transform **three** tips] <img src="img/Tree4.png" width="712" /> --- .hand[Solution: don't include .x value in our recipe!] --- .hand[Before:] <img src="img/Map7.png" width="712" /> --- .hand[After:] <img src="img/Map8.png" width="712" /> --- class: inverse, middle ## .hand[okay, can we do use this in "ashtree"?] ## .hand[live coding #3...] --- class: middle background-image: url("img/ashtree5.png") background-size: cover --- class: inverse, middle ## .hand[iteration problems vary...] --- class: inverse <img src="img/Tree1.png" width="712" /> --- class: inverse <img src="img/Tree2.png" width="712" /> --- class: inverse <img src="img/Tree3.png" width="712" /> --- class: inverse <img src="img/Tree4.png" width="712" /> --- class: inverse <img src="img/Tree5.png" width="712" /> --- class: inverse <img src="img/Tree6.png" width="712" /> --- class: inverse <img src="img/Tree7.png" width="712" /> --- class: inverse <img src="img/Tree8.png" width="712" /> --- class: inverse <img src="img/Tree9.png" width="712" /> --- <img src="img/Acc1.png" width="712" /> --- <img src="img/Acc2.png" width="712" /> --- <img src="img/Acc3.png" width="712" /> --- <img src="img/Acc4.png" width="712" /> --- <img src="img/Acc5.png" width="712" /> --- <img src="img/Acc6.png" width="712" /> --- <img src="img/Acc7.png" width="712" /> --- <img src="img/Acc8b.png" width="712" /> --- class: inverse, middle ## .hand[so let's try to use accumulate()] ## .hand[... a.k.a., live coding #4] --- class: middle background-image: url("img/ashtree4.png") background-size: cover --- class: inverse, middle ## .hand[live coding #5...] ## .hand[... let's make it pretty!] --- class: middle background-image: url("img/flametree3.png") background-size: cover .pull-right-wide[ .biggish-hotpink-text[thanks!] ] <br><br><br><br><br><br><br> ## github.com/djnavarro/ashtree ## github.com/djnavarro/flametree