CODEWITHSUNDEEP
rlistplotscatter
pocketlizard
pocketlizard

Reputation: 389

R: scatterplot from list

I have data similar to the following:

a <- list("1999"=c(1:50), "2000"=rep(35, 20), "2001"=c(100, 101, 103))

I want to make a scatterplot where the x axis is the years (1999, 2000, 2001 as given by the list names) and the y axis is the value within each list. Is there an easy way to do this? I can achieve something close to what I want with a simple boxplot(a), but I'd like it to be a scatterplot rather than a boxplot.

Upvotes: 1

Views: 1299

Answers (3)

akrun
akrun

Reputation: 887148

An option using tidyr/dplyr/ggplot2

library(ggplot2)
library(tidyr)
library(dplyr)
unnest(a, year) %>%
             ggplot(., aes(x=year, y=x)) +
                    geom_point(shape=1)

Upvotes: 0

josliber
josliber

Reputation: 44330

You could create a data frame with the year in one column and the value in the other, and then you could plot that the appropriate columns:

b <- data.frame(year=as.numeric(rep(names(a), sapply(a, length))), val=unlist(a))
plot(b)

enter image description here

Upvotes: 2

DeanAttali
DeanAttali

Reputation: 26323

This will do what you want

do.call(rbind,
  lapply(names(a), function(year) data.frame(year = year, obs = a[[year]]))
)

Or break it up into two function calls (lapply and then do.call) to make it more understandable what's going on. It's pretty simple if you go through it. The lapply creates one dataframe per year where each year gets all the values for that year in the list. Now you have 3 dataframes. Then do.call binds these dataframes together.

Upvotes: 2

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