Last active
September 12, 2018 16:24
-
-
Save hrbrmstr/e3253ddd353f1a489bb4 to your computer and use it in GitHub Desktop.
Track Hurricane Danny (or any other Unisys-data-available-tropical storm)
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
library(leaflet) | |
library(stringi) | |
library(htmltools) | |
library(RColorBrewer) | |
# get tracks | |
danny <- readLines("http://weather.unisys.com/hurricane/atlantic/2015/DANNY/track.dat") | |
# extract data | |
danny_dat <- read.table(textConnection(gsub("TROPICAL ", "TROPICAL_", danny[3:length(danny)])), | |
header=TRUE, stringsAsFactors=FALSE) | |
# make storm type names prettier | |
danny_dat$STAT <- stri_trans_totitle(gsub("_", " ", danny_dat$STAT)) | |
# make column names prettier | |
colnames(danny_dat) <- c("advisory", "lat", "lon", "time", "wind_speed", "pressure", "status") | |
# assign colors | |
danny_dat$color <- as.character(factor(danny_dat$status, | |
levels=c("Tropical Depression", "Tropical Storm", | |
"Hurricane-1", "Hurricane-2", "Hurricane-3", | |
"Hurricane-4", "Hurricane-5"), | |
labels=rev(brewer.pal(7, "YlOrBr")))) | |
last_advisory <- tail(which(grepl("^[[:digit:]]+$", danny_dat$advisory)), 1) | |
# draw the map | |
leaflet() %>% | |
addTiles() %>% | |
addPolylines(data=danny_dat[1:last_advisory,], ~lon, ~lat, color=~color) -> tmp_map | |
if (last_advisory < nrow(danny_dat)) { | |
tmp_map <- tmp_map %>% | |
addCircles(data=danny_dat[last_advisory:nrow(danny_dat),], ~lon, ~lat, color=~color, fill=~color, radius=25000, | |
popup=~sprintf("<b>Advisory forecast for +%sh (%s)</b><hr noshade size='1'/> | |
Position: %3.2f, %3.2f<br/> | |
Expected strength: <span style='color:%s'><strong>%s</strong></span><br/> | |
Forecast wind: %s (knots)<br/>Forecast pressure: %s", | |
htmlEscape(advisory), htmlEscape(time), htmlEscape(lon), | |
htmlEscape(lat), htmlEscape(color), htmlEscape(status), | |
htmlEscape(wind_speed), htmlEscape(pressure))) | |
} | |
html_print(tmp_map) |
the exact same code ran for me perfectly just now in a clean R session
Some updates for the current season: https://gist.github.com/kmatt/dbf1b67c17ad996d0acb
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
@hrbrmstr i try to execute but i habe this error : Error in map$x : $ operator is invalid for atomic vector in line "addPolylines(data=danny_dat[1:last_advisory,], ~lon, ~lat, color=~color) -> tmp_map"