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Editorial Team
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Asked: 2026-06-16T21:38:49+00:00

The minimum observation in my data is 326. But geom_freqpoly plots a frequency polygon

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The minimum observation in my data is 326. But geom_freqpoly plots a frequency polygon that starts below zero. What gives? And how do I make it start in a sensible place?

min(diamonds$price)
# [1] 326
qplot(price, data=diamonds, geom="freqpoly")

enter image description here

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1 Answer

  1. Editorial Team

    You can set the origin argument: 

    qplot(price, data=diamonds, geom="freqpoly", origin=0)

    enter image description here

    geom_freq poly() is by default figuring out the polygon to make using the same stat_bin() function that geom_histogram() uses. You can get more information on different valid arguments for controlling the density estimate from ?stat_bin()

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