Wrong matching of colours in ggplot using scale color discrete

Asked May 24 '21 at 18:03

Active May 25 '21 at 01:53

Viewed 108 times

ggplot() + 
    geom_line(data=Final_UDR_summary, aes(y=pass_rate_IIR, x=year_week, color="blue"),size=1) + 
    geom_line(data=Final_UDR_summary, aes(y=pass_rate_IQR, x=year_week, color="red"),size=1) +
    geom_line(data=Final_UDR_summary, aes(y=pass_rate_DR, x=year_week, color="green"),size=1)  +
    scale_color_discrete(name="Pass rate name",labels=c("pass_rate_IIR", "pass_rate_IQR", "pass_rate_DR")) + 
    ggtitle("Plot of pass rate over time") + xlab("Time in interval of weeks") + ylab("Pass Rates")

This is producing a graph but the color of the line is off from the data and it definitely doesn't match the legend which is automatically generated.

edited May 25 '21 at 01:53

LC-datascientist

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asked May 24 '21 at 18:03

user15981608

Does your data contain missing value? – Pete Kittinun May 24 '21 at 18:09
5

When you set constants, e.g., `color = "blue"`, rather than mapping column names, you need to put them **outside** `aes()`. Though a better approach overall would be long format data with a single `geom_line` call and color mapped to a column name. – Gregor Thomas May 24 '21 at 18:29
Does [this](https://stackoverflow.com/a/64337329/8245406) help? – Rui Barradas May 24 '21 at 18:50

Wrong matching of colours in ggplot using scale color discrete

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