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ggplot2 is an actively maintained open-source chart-drawing package for R, written by Hadley Wickham, based upon the principles of "Grammar of Graphics". It partially replaces R's basic plot and the lattice package, while providing a clean, powerful, orthogonal and fun API.

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Using ggplot2 to create a bar chart

The number of people in each category is not defined by the number of rows but by the number in the Freq column. You therefore have to take the sum of those values and plot the result, this can be don …
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How can I plot a line for time series data with categorical intervals in R

the first row for each day and get the row number (which specifies where the ticks and labels have to be drawn) and the day name (which specifies what the labels should display). library(readr) library(ggplot2
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