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  library(tidyverse)

## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ──
## ✔ dplyr     1.1.4     ✔ readr     2.1.5
## ✔ forcats   1.0.0     ✔ stringr   1.5.1
## ✔ ggplot2   3.5.1     ✔ tibble    3.2.1
## ✔ lubridate 1.9.3     ✔ tidyr     1.3.1
## ✔ purrr     1.0.2     
## ── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
## ✖ dplyr::filter() masks stats::filter()
## ✖ dplyr::lag()    masks stats::lag()
## ℹ Use the conflicted package (<http://conflicted.r-lib.org/>) to force all conflicts to become errors

  data(economics, package="ggplot2")                # init data
  economics <- data.frame(economics)                # convert to dataframe
  ggplot(economics) +
    geom_line(aes(x=date, y=pce, color="pcs")) +
    geom_line(aes(x=date, y=unemploy, col="unemploy")) +
    scale_color_discrete(name="Legend") +
    labs(title="Economics")

    # plot multiple time series using 'geom_line's