jmcastagnetto

require(XML)
require(reshape2)

# node content cleanup
cleanup <- function(node) {
    val <- xmlValue(node)
    if(is.character(val) | is.factor(val)) {
        out <- gsub("'","", val, fixed=TRUE)
    } else {
        out <- val

jmcastagnetto

# Inspired by http://xkcd.com/1609/

set.seed(1609)
food <- c("ice cream", "ham", "relish",
          "pancakes", "ketchup", "cheese",
          "eggs", "cupcakes", "sour cream",
          "hot chocolate", "avocado", "skittles",
          "wasabi", "tofu", "steak", "sweet potatoes")
nfood <- length(food)

jmcastagnetto

# BREXIT events and exchange rate of GBP -> USD
library(quantmod)
pd <- getFX("GBP/USD",
            from="2016-01-01",
            to="2016-06-30")
plot(GBPUSD, ylim=c(1.35,1.5), main="British Pounds per USD")

df <- data.frame(
  date = index(GBPUSD),
  rate = as.numeric(GBPUSD)

jmcastagnetto

Keybase proof

I hereby claim:

• I am jmcastagnetto on github.
• I am jmcastagnetto (https://keybase.io/jmcastagnetto) on keybase.
• I have a public key whose fingerprint is 73A9 891B 6BAB 0D95 75AF 3759 03B2 0193 CD42 79DF

To claim this, I am signing this object:

jmcastagnetto

---
title: "Example of conditional chunk evaluation"
author: "Jesús M. Castagnetto"
date: "2019-05-30"
output:
  pdf_document:
    toc: true
    number_sections: true
  html_document:
    df_print: paged

jmcastagnetto

library(tidyverse)                                                              
df <- data.frame(                                                               
  x1 = 0:2, x2 = 1:3,                                                           
  y1 = rep(0, 3),  y2 = rep(2, 3),                                              
  color = c("r", "w", "r"))                                                     
                                                                                
ggplot(df) +                                                                    
  geom_rect(aes(xmin = x1, xmax = x2,                                           
                ymin = y1, ymax = y2,                                           
                fill = color)                                                   

jmcastagnetto

# based on the example at: https://echarts4r.john-coene.com/articles/chart_types.html#treemap
# the JS example at: https://echarts.apache.org/examples/en/editor.html?c=treemap-show-parent
# and the documentation at: https://echarts.apache.org/en/option.html#series-treemap.type
library(tidyverse)
library(echarts4r)

# this data structure does not work with the changed function

# set.seed(13579)
# 

jmcastagnetto

# Ref: https://twitter.com/Amit_Levinson/status/1187754568014336002 

set.seed(2019)
gen_grades <- function(n, avg, sd, min, max, nsmpl) {
  smpl <- rnorm(nsmpl, avg, sd)
  smpl <- smpl[smpl >= min & smpl <= max]
  if (length(smpl) >= n) {
    return(sample(smpl, n))
  } else {
    stop(simpleError("Not enough sample data. Increase 'nsmpl'"))

jmcastagnetto

library(countrycode)
library(tidyverse)
library(ggrepel)

df <- readxl::read_excel("Sustainable_food_systems_global_index-1.xlsx", sheet = 1, skip = 5)

df <- df %>% 
  mutate(
    region = countrycode(origin = "iso3c",
                         sourcevar = ISO3,

jmcastagnetto

library(tidyverse)
library(rvest)

url <- "http://www.sunat.gob.pe/indicestasas/uit.html"
uit_table <- html(url) %>%
  html_node(xpath = "/html/body/div[2]/div/div[1]/div[4]/div[1]/div[1]/center/table") %>%
  html_table(header = TRUE) %>%
  janitor::clean_names()

uit_df <- uit_table %>%