---

title: “L4 Report” author: “Jing Zhang” date: “2024-03-22” output: html_document

Lesson 4 Report

Tornado in USA

This week, we are going to explore tornado data in USA from year 2016 to 2021.

My first step was to load all the packages and data for this project.

#loading all packages
library(sf)           
library(ggplot2)      
library(dplyr)        
library(tidyr)        
library(scales)       
library(RColorBrewer) 
library(units)
library(cowplot)
#reading in tornado shapefiles
okcounty <- st_read("ok_counties.shp", quiet = TRUE)
tpoint <- st_read("ok_tornado_point.shp", quiet = TRUE)
tpath <- st_read("ok_tornado_path.shp", quiet = TRUE)

Since there are many years of record in the data, we want to narrow it down to five years, which are 2016 to 2021.

Looking at data

Part one of this report will show you general tornado path and location maps.

Density Research

Part two of this project will present tornado density in each county by year.

Visual Explorations

Part three explores classification changes in displaying the graphs.

Setting Up A Map

Displaying tornado data on leaflet map

Finally, we have map the events on a map and you can explore the interactive map by clicking on each of the point.

Conclusion

In conclusion, hope the visualizations and figures in this report can give you a informative story of tornado events happens in the USA during the year 2016 to year 2021.