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class_code_181002.R
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class_code_181002.R
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midterm_grades <- c(85, 72, 90)
measurement_1 <- c(1, 1.5, 0.25)
class_stats <- data.frame(Grade = midterm_grades,
measurement = measurement_1)
class_stats
plot(class_stats)
summary(lm(class_stats$Grade ~
class_stats$measurement))
#.Rdata files
x <- c(2, 3, 5)
y <- rep(seq(5, 20, by = 2), 2)
x
y
save(x, y, file = "save_data.RData")
rm(list = ls())
x
y
load("save_data.RData")
x
y
getwd()
setwd("~/Dropbox/BSDS100_Development/Code Demonstrations/live-coding/")
getwd()
load("save_data.RData")
### read.table
?read.table()
airports1 <- read.table(
file = "https://raw.githubusercontent.com/abbiepopa/bsds100/master/Data/airports.csv",
sep = ",")
airports1[1:2, 1:3]
airports2 <- read.table(
file = "https://raw.githubusercontent.com/abbiepopa/bsds100/master/Data/airports.csv",
sep = ",", header = TRUE
)
airports2[1:2, 1:3]
airports2 <- read.table("airports.csv",
sep = ",",
header = T)
airports2[1:2, 1:3]
airports3 <- read.csv("https://raw.githubusercontent.com/abbiepopa/bsds100/master/Data/airports.csv")
airports3[1:2, 1:3]
install.packages("openxlsx")
library(openxlsx)
airports4 <- read.xlsx("airports_excel.xlsx")
airports4[1:2, 1:3]
#Irregular Data
email_test <- read.table(
"https://raw.githubusercontent.com/abbiepopa/bsds100/master/Data/USF_email.txt"
)
email1 <- readLines(
"https://raw.githubusercontent.com/abbiepopa/bsds100/master/Data/USF_email.txt"
)
email1[1:3]
email2 <- readLines(
"https://raw.githubusercontent.com/abbiepopa/bsds100/master/Data/USF_email.txt",
n = 2
)
email2
singles <- scan("singles.txt", what = numeric(0))
singles
str(singles)
triples <- scan("triples.txt",
what = list(date = character(0),
high = numeric(0),
low = numeric(0)))
triples
triples_df <- data.frame(triples)
triples_df
# will not work
triples_broken <- scan("triples.txt",
what = data.frame(date = character(0),
high = numeric(0),
low = numeric(0)))
#what has to be a list
### output
my_name <- "Abbie Popa"
my_name
(my_name <- "Abbie Popa")
cat("My name is", my_name, sep = " ")
# cat to file
cat("hello world", file = "my_class_doc.txt")
cat("\n", "My name is Abbie", file = "my_class_doc.txt",
append = T)
readLines("my_class_doc.txt")
sink("my_second_class_doc.txt")
cat("hello bsds100")
cat("\n", "how are you?", "\n")
sink()
readLines("my_second_class_doc.txt")
sink("my_third_class_doc.txt")
cat("hello bsds100")
cat("\n")
my_name
sink()
readLines("my_third_class_doc.txt")
sink("my_prettier_class_doc.txt")
cat("hello bsds100")
cat("\n")
cat(my_name)
sink()
readLines("my_prettier_class_doc.txt")
head(airports3)
mod_airports <- airports3[1:100, ]
write.table(mod_airports,
file = "modified_airports.csv",
sep = ",",
row.names = F)
pdf("US_airports.pdf")
plot(airports3$lat ~ airports3$long, col = "green",
xlim = c(-180, -50),
ylim = c(10, 72),
xlab = "",
ylab = "")
dev.off()