I have my data stored in the csv format it . I want to plot this data colored as per the activity means 4 different activities should be of 4 different color.
ACTIVITY LAT LONG
Resting 21.14169444 70.79052778
Feeding 21.14158333 70.79313889
Resting 21.14158333 70.79313889
Walking 21.14163889 70.79266667
Walking 21.14180556 70.79222222
Sleeping 21.14180556 70.79222222
I have tried the following codes but it didn't work:
ACTIVITY.cols <- cut(ACTIVITY, 5, labels = c("pink", "green", "yellow","red","blue"))
plot(Data$Latitude,Data$Longitude, col = as.character(ACTIVITY.cols)
and
plot(Data$Latitude,Data$Longitude, col=c("red","blue","green","yellow")[Data$ACTIVITY]
Using
txt <- "ACTIVITY LAT LONG
Resting 21.14169444 70.79052778
Feeding 21.14158333 70.79313889
Resting 21.14158333 70.79313889
Walking 21.14163889 70.79266667
Walking 21.14180556 70.79222222
Sleeping 21.14180556 70.79222222"
dat <- read.table(text = txt, header = TRUE)
One option is to index into a vector of colours of length nlevels(ACTIVITY)
using the ACTIVITY
variable as the index.
cols <- c("red","green","blue","orange")
plot(LAT ~ LONG, data = dat, col = cols[dat$ACTIVITY], pch = 19)
legend("topleft", legend = levels(dat$ACTIVITY), col = cols, pch = 19, bty = "n")
This produces
To see why this works, cols
is expanded to
> cols[dat$ACTIVITY]
[2] "green" "red" "green" "orange" "orange" "blue"
because ACTIVITY
is a factor but stored numerically as 1,2,...,n.
Other higher-level solutions are available, so consider the ggplot2 package for simple creation of the same plot.
library("ggplot2")
plt <- ggplot(dat, aes(x = LONG, y = LAT, colour = ACTIVITY)) +
geom_point()
plt
which produces
Use the ggplot2 package it's faster and more beautiful.
library(ggplot2)
ggplot("your dataframe") + geom_point(aes(x = Latitude, y = Longitude, colour = factor(ACTIVITY)))
Here's how I would do this, using a named vector to define the colors:
set.seed(1);
N <- 30;
df <- data.frame(activity=sample(c('Resting','Feeding','Walking','Sleeping'),N,replace=T),lat=runif(N,0,100),long=runif(N,0,100));
cols <- c(Resting='red',Feeding='blue',Walking='green',Sleeping='yellow');
par(mar=c(5,4,4,6)+0.1,xaxs='i',yaxs='i');
plot(df$lat,df$long,xlim=c(0,100),ylim=c(0,100),col=cols[as.character(df$activity)],main='Activity Locations',xlab='Latitude',ylab='Longitude');
legend(103,80,names(cols),col=cols,pch=1,xpd=T);
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