Categorical axis in subplot

[Incblob]

I cannot seem to find a way to set a numerical axis as categorical in a subplot.

In a normal graph i would just use fig.update_layout(xaxis_type = 'category')

But update_layout does not have a row, col parameter. So... how do i set that for a specific trace?
add_trace doesn't seem to have any layout options either.
Is this just not implemented?

Adding the xaxis as a str doesn't help either, as it is converted to integer. Even adding an empty space doesn't work. x = [str(-k)+' ' for k in range(0,10)]
I would have to add some sort of letter to the name.
Which would work, it's just that since the functionality for categorical axes is implemented i would think that it would be available for subplots as well.

Here's a basic subplot graph:

from plotly.subplots import make_subplots
import plotly.graph_objects as go

fig = make_subplots(rows = 2, cols = 2, subplot_titles=['Subplot1', 'Subplot2'],
                    specs=[[{}, {"rowspan": 2},]]+[[{},None]],
                    column_widths= [0.7,0.3]
                   )
fig.add_trace(
    go.Bar(y = [k for k in range(0,10)], x = [k for k in range(0,10)],orientation='h' ),
    row = 1, col = 1,
)
fig.add_trace(
    go.Bar(y = [-k for k in range(0,10)], x = [k for k in range(0,10)] ,),
    row = 1, col = 2,
)
fig.add_trace(
    go.Bar(y = [k for k in range(0,10)], x = [k for k in range(0,10)] ),
    row = 2, col = 1,
)
fig.show()

I've tried adding an entire Figure with add_trace, so i can define the layout as i add it, but that just results in an error.

Any help is appreciated :)

[emmanuelle]

Hi @Incblob you need to use the axis number in update_layout, for example fig.update_layout(xaxis3_type='category')

from plotly.subplots import make_subplots
import plotly.graph_objects as go

fig = make_subplots(rows = 2, cols = 2, subplot_titles=['Subplot1', 'Subplot2'],
                    specs=[[{}, {"rowspan": 2},]]+[[{},None]],
                    column_widths= [0.7,0.3]
                   )
fig.add_trace(
    go.Bar(y = [k for k in range(0,10)], x = [k for k in range(0,10)],orientation='h' ),
    row = 1, col = 1,
)
fig.add_trace(
    go.Bar(y = [-k for k in range(0,10)], x = [k for k in range(0,10)] ,),
    row = 1, col = 2,
)
fig.add_trace(
    go.Bar(y = [k for k in range(0,4)], x = [k for k in [1, 3, 4, 10] ]),
    row = 2, col = 1,
)
fig.update_layout(xaxis3_type='category')
fig.show()

Please close the issue if this solves your problem. Also please note that help requests are preferably asked on the community forum https://community.plotly.com/, while the issue tracker is more for bug reports and feature requests. Of course sometimes it is hard to know whether something is a bug or not :-).

[sk-ys]

Hi, I faced a similar situation. I used fig.update_xaxes(patch=dict(type='category'), row=r, col=c).