How to group/separate?

[DeLaRiva]

I exactly would like to create a plot like https://www.machinelearningplus.com/wp-content/uploads/2018/11/24_JoyPlot_joypy-min-1024x741.png found on https://www.machinelearningplus.com/plots/top-50-matplotlib-visualizations-the-master-plots-python/ , where they use fig, axes = joypy.joyplot(mpg, column=['hwy', 'cty'], by="class", ylim='own', figsize=(14,10))

To do so I use fig, ax = joypy.joyplot(Temperatures_df, by="Transformer", figsize=(14,7), linewidth=0.05,overlap=3,colormap=cm.OrRd_r)
but I receive the following:

but I would like to have the variables separated and then each variable grouped by "Transformer". Hence, I tried fig, ax = joypy.joyplot(Temperatures_df, figsize=(14,7), linewidth=0.05,overlap=3, colormap=cm.OrRd_r) but then I receive:

What I am actually looking for is a combination of both of them. Respectively I don't understand why I can't create the same appearance like in the first image as this fulfills my expectations already.
Why is that?

The Temperatures_df looks like following:

BotTmp | EnvTmp | HPTmpClc | LTCTmp | Transformer
timestamp

2018-02-02 14:31:00 | NaN | NaN | 54.400000 | NaN | Transformer S1
2018-02-02 14:45:00 | NaN | NaN | 54.400000 | NaN | Transformer S1
2018-02-02 15:00:00 | NaN | NaN | 54.400000 | NaN | Transformer S1
(...)
2018-10-25 01:30:00 | NaN | NaN | NaN | 30.790190 | Transformer S2

[leotac]

Hi,

not sure what is your expected result. I would suggest looking at the notebook with examples, in the last few examples (about colors).
Currently, if you use both the by and colormap argument, the same colormap is applied to all groups. This is why you obtain the result in the first figure. (Not sure this is the most sensible default indeed, but it's like this at the moment).

You should use the color argument and pass explicitly the colors, if you want each group to have a separate color, like this:

fig, axes = joypy.joyplot(iris,fill=True, legend=True, by="Name", color=["k","b","r","g"])

You could even pass a list of different colormaps, where the list has the same length as the number of groups. You can find both examples in the notebook.