PlotnineError: "'position_jitterdodge' requires at least one aesthetic to dodge by."

[jvschoen]

plotnine/plotnine/positions/position_jitterdodge.py

Lines 50 to 58 in 90412f4

	# Adjust the x transformation based on the number
	# of dodge variables
	dvars = {'alpha', 'colour', 'fill', 'linetype',
	'shape', 'size', 'stroke'}
	dodge_columns = data.columns.intersection(dvars)
	if len(dodge_columns) == 0:
	raise PlotnineError(
	"'position_jitterdodge' requires at least one "
	"aesthetic to dodge by.")

(
    ggplot(df, aes(x='x_val', y='y_val', color='device'))
    + geom_boxplot() 
    + geom_jitter(position=position_jitterdodge())
)

The code works fine when using geom_dodge:

(
    ggplot(df, aes(x='x_val, y='y_val, color='device'))
    + geom_boxplot() 
    + geom_jitter(position=position_dodge(0.75))
)

[has2k1]

This is a bug. In the meantime, use british spelling colour='device'.

[jvschoen]

@has2k1 This does not resolve the issue. I have changed my code to use the british spelling, but I still get the same error

(
    ggplot(df, aes(x='x_val', y='y_val', colour='device'))
    + geom_boxplot() 
    + geom_jitter(position=position_jitterdodge())
)

I had tried that earlier after looking at the source code doesn't have 'color', but it doesn't seem to matter what spelling I use for positiion_jitterdodge()

[has2k1]

.. but I still get the same error

Sorry I was mistaken. But as you are using points, I think you can safely fill='device'. However, the underlying bug was definitely fixed.

[jvschoen]

@has2k1 Using fill corrected this for me. When you say the bug is fixed, is it fixed in a pip install update?

Glad you got it working! Thanks!

[has2k1]

It will be in the next release. I am hoping for next week.