theteacup/stt-3850

App State Statistical Data Analysis I Spring 2024

R Download

• https://archive.linux.duke.edu/cran/

RStudio

• https://posit.co/download/rstudio-desktop/#download

Helpful Links

• https://sites.calvin.edu/scofield/courses/m143/materials/RcmdsFromClass.pdf

R objects:

• Vectors
• Data Frames
• Matrix
• Factors
• List

Non-Numeric

• Nominal
• Ordinal

R Base Package

• hist
• barplot
• boxplot
• plot

ggplot2

• ggplot

Data Visualization / R Graphics

DYPLR Package

• arrange : for sorting
• select : for selecting columns
• filter : for filtering or selecting rows
• mutate : for add new column
• group_by : for grouping data
• summarize : for summarizing grouped data
• top_m : deleting the top n?

pipe operator

• %>%

EDA (Exploratory Data Analysis)

• Basic Plot
• Box Plot
• Bar Plot
• Histogram
• Scatterplot

Correlation - linear relationship between 2 numeric/quantitive variables

Direction

• Positive : x increases and y increases
• Negative : x decreases and y increases

Binomal Distrubution

Probability

• var() variance
• mean()
• rbinom