Home/ Questions/Simple way to fix the ''error: invalid input: date_trans works with objects of class date only'' error?
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daxmann
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Asked: 2022-07-02T03:08:43+00:00 In:

Simple way to fix the ”error: invalid input: date_trans works with objects of class date only” error?

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While I try to use the following R code to add a rectangle using the geom_rect function to our plot, I encountered the error ”error: invalid input: date_trans works with objects of class date only”:

ggp +
geom_rect(data = data,
          aes(xmin = "01-01-2024",
              xmax = "01-01-2025",
              ymin = -Inf,
              ymax = Inf))
# Error: Invalid input: date_trans works with objects of class Date only

Can someone explain why the “error: invalid input: date_trans works with objects of class date only” issue happened? Where have I gone wrong? Thank you!

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1 Answer

  1. Expert

    The cause: You did not properly specified the dates within geom_rect, which is the cause of issue.

    Solution: To fix this error, you must use the geom_rect dates in conjunction with the as.Date function. You must also specify the format argument in accordance with the format of your dates:

    ggp +
geom_rect(data = data,
          aes(xmin = as.Date("01-01-2024", format = "%d-%m-%Y"),
              xmax = as.Date("01-01-2025", format = "%d-%m-%Y"),
              ymin = -Inf,
              ymax = Inf))

    This picture illustrates how we built a ggplot2 time series plot with a rectangle element. No more mistakes!

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