Dear All, I have a dataframe with four cols: Date, Placename, geogr. latitude, geogr. longitude. How can I plot the path as a line, ordered by the date, with the longitude as the x-axis and the latitude as the y-axis? Thank you in advance! Yours, Ferri
Probably
sort the data frame by date
Then
plot( mydf$geogr.longitude, mydf$geogr.latitude, type='l')
Search the web for some tutorials
See the help pages for
plot
plot.default
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?On 10/31/18, 2:27 PM, "R-help on behalf of Ferri Leberl"
<r-help-bounces at r-project.org on behalf of ferri.leberl at gmx.at>
wrote:
Dear All,
I have a dataframe with four cols: Date, Placename, geogr. latitude, geogr.
longitude.
How can I plot the path as a line, ordered by the date, with the longitude
as the x-axis and the latitude as the y-axis?
Thank you in advance!
Yours, Ferri
______________________________________________
R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Hello,
The following uses ggplot2.
First, make up a dataset, since you have not posted one.
lat0 <- 38.736946
lon0 <- -9.142685
n <- 10
set.seed(1)
Date <- seq(Sys.Date() - n + 1, Sys.Date(), by = "days")
Lat <- lat0 + cumsum(c(0, runif(n - 1)))
Lon <- lon0 + cumsum(c(0, runif(n - 1)))
Placename <- rep(c("A", "B"), n/2)
path <- data.frame(Date, Placename, Lat, Lon)
path <- path[order(path$Date), ]
Now, two graphs, one with just one line of all the lon/lat and the other
with a line for each Placename.
library(ggplot2)
ggplot(path, aes(x = Lon, y = Lat)) +
geom_point() +
geom_line()
ggplot(path, aes(x = Lon, y = Lat, colour = Placename)) +
geom_point(aes(fill = Placename)) +
geom_line()
Hope this helps,
Rui Barradas
?s 21:27 de 31/10/2018, Ferri Leberl escreveu:>
> Dear All,
> I have a dataframe with four cols: Date, Placename, geogr. latitude, geogr.
longitude.
> How can I plot the path as a line, ordered by the date, with the longitude
as the x-axis and the latitude as the y-axis?
> Thank you in advance!
> Yours, Ferri
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
Below a similar example, using sf and leaflet; plotting the trajectory
on a background map.
library(leaflet)
library(sf)
library(dplyr)
# Generate example data
gen_data <- function(id, n) {
data.frame(
id = id,
date = 1:n,
lat = runif(10, min = -90, max = 90),
lon = runif(10, min = -180, max = 180)
)
}
dta <- lapply(1:2, gen_data, n = 10) %>% bind_rows()
# Transform all records of one object/person to a st_linestring, then
# combine into one sf column
lines <- dta %>%
arrange(id, date) %>%
split(dta$id) %>%
lapply(function(d) st_linestring(cbind(d$lon, d$lat))) %>%
unname() %>% # Without the unname it doesn't work for some reason
st_sfc()
# Plot using leaflet
leaflet() %>%
addTiles() %>%
addPolylines(data = lines)
HTH - Jan
On 01-11-18 11:27, Rui Barradas wrote:> Hello,
>
> The following uses ggplot2.
>
> First, make up a dataset, since you have not posted one.
>
>
>
> lat0 <- 38.736946
> lon0 <- -9.142685
> n <- 10
>
> set.seed(1)
> Date <- seq(Sys.Date() - n + 1, Sys.Date(), by = "days")
> Lat <- lat0 + cumsum(c(0, runif(n - 1)))
> Lon <- lon0 + cumsum(c(0, runif(n - 1)))
> Placename <- rep(c("A", "B"), n/2)
>
> path <- data.frame(Date, Placename, Lat, Lon)
> path <- path[order(path$Date), ]
>
>
> Now, two graphs, one with just one line of all the lon/lat and the other
> with a line for each Placename.
>
> library(ggplot2)
>
> ggplot(path, aes(x = Lon, y = Lat)) +
> ? geom_point() +
> ? geom_line()
>
>
> ggplot(path, aes(x = Lon, y = Lat, colour = Placename)) +
> ? geom_point(aes(fill = Placename)) +
> ? geom_line()
>
>
> Hope this helps,
>
> Rui Barradas
>
> ?s 21:27 de 31/10/2018, Ferri Leberl escreveu:
>>
>> Dear All,
>> I have a dataframe with four cols: Date, Placename, geogr. latitude,
>> geogr. longitude.
>> How can I plot the path as a line, ordered by the date, with the
>> longitude as the x-axis and the latitude as the y-axis?
>> Thank you in advance!
>> Yours, Ferri
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.