tz issues with scale_x_datetime with ggplot2 2.0.0?

[E Chu]

Hi there,

I am having issues with setting tz properly with the new ggplot2, v2.0.0.

My input data is set to PST, however, the graph outputs in UTC.

  ggplot(data=d, aes(x=TIMEOFDAY, y=USAGE)) + 

    geom_line(aes(group=DATE))  + 

     xlab("Time of Day") +

     ylab("Demand (kW)")  +

     scale_x_datetime(date_labels="%H:%M %Z", date_breaks="2 hours")

In older versions of ggplot2, I did not specifically set tz in the plot function.  As long as the input data had tz set, my plot used the intended timezone.

The scale_x_datetime function does not seem to accept a "tz" argument.

Any ideas how to control tz in the display?

Thanks!

Emily

[Sherif Soliman]

Hi Emily,

Try replacing

date_labels = "..."

with

labels = date_format("...", tz = "...").

This assumes you are using the scales package. So the result should be:

ggplot(data=d, aes(x=TIMEOFDAY, y=USAGE)) + 
    geom_line(aes(group=DATE))  + 
    xlab("Time of Day") +
    ylab("Demand (kW)")  +
    scale_x_datetime(
        labels = date_format("%H:%M %Z", 
                             tz = "PST"), 
        date_breaks="2 hours"
    )

Does this work for you?

Sherif

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[E Chu]

Hi Sherif,

Yes that works.  Thank you!!

Emily