Intro to R Notebooks

About this R Notebook

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Run Code

x = "Hello World!"
x

[1] "Hello World!"

LETTERS[1:5]

[1] "A" "B" "C" "D" "E"

YOUR TURN

Compute the product of the integers from 1 to 5. Answer

# Your answer here

Plot a Cosine Wave

Run the following:

## Plot a cosine wave
xvals = 4 * pi * (0:100)/100
plot(x = xvals, y = cos(xvals), type = "b")

YOUR TURN

Plot a sine wave. Answer

# Your answer here

Plot the Batman Logo

Run the following lines all at once:

## Plot the batman logo
f1u <- function(x) ifelse ((abs(x) >  3 & abs(x) <= 7), 3*sqrt(1-(x/7)^2), 0)
f1d <- function(x) ifelse ((abs(x) >= 4 & abs(x) <= 7), -3*sqrt(1-(x/7)^2), 0)
f2u <- function(x) ifelse ((abs(x) > 0.50 & abs(x) < 0.75), 3*abs(x)+0.75, 0)
f2d <- function(x) ifelse ((abs(x) > -4 & abs(x) < 4), abs(x/2)-(3*sqrt(33)-7)*x^2/112-3 + sqrt(1-(abs(abs(x)-2)-1)^2), 0)
f3u <- function(x) ifelse ((x > -0.5 & x < 0.5), 2.25, 0)
f4u <- function(x) ifelse ((abs(x) >  1 & abs(x) <= 3), 6 * sqrt(10)/7 + (1.5 - 0.5 * abs(x)) * sqrt(abs(abs(x)-1)/(abs(x)-1)) - 6 * sqrt(10) * sqrt(4-(abs(x)-1)^2)/14, 0)
f5u <- function(x) ifelse ((abs(x) >= 0.75 & abs(x) <= 1), 9-8*abs(x), 0)
fu <- function (x) f1u(x) + f2u(x) + f3u(x) + f4u(x) + f5u(x)
fd <- function (x) f1d(x) + f2d(x)
bm <- function(r,x) ifelse(r%%2==0, fu(x), fd(x))
opar <- par(bg="#02233f", mar=c(0,0,0,0))
plot(x=seq(-7,7,0.065), y=Vectorize(bm)(1:216, seq(-7,7,0.065)), col="#999900", type="l", lwd=3)
par(opar)

View the Attendee Map

library(googlesheets4)
library(sf)
library(leaflet)

sheet_id <- "1lu2PBiKCK_A628ADY9opgpeqGmg0kc8JsV63KCYmLzo"

## Read the data frame from Google Sheets
gs4_deauth()
pipo_df <- range_read(sheet_id, sheet = "Form Responses 1")

Reading from "Spatial Analysis with R Workshop (Responses)"
Range "'Form Responses 1'"

## Convert the data frame to a simple features data frame
pipo_sf <- st_as_sf(pipo_df, coords = c("Lon", "Lat"), crs = 4326)

## Plot the locations in an interactive leaflet map
leaflet(pipo_sf) %>% 
  addTiles() %>% 
  addCircleMarkers(radius = 5, color = "red", opacity = 0.5, 
                   popup = ~paste0("<p><b>", `First Name`, "</b></p>",
                                   "Favorite plant / animal: ", `Favorite plant or animal`, "</p>"))

End

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