Change Plot Question

[Alex-Wenner-FHR]

Trying to change a specific point on the plot conditionally, using an update that looks like:

q.page['trend'].items[0].visualization.plot.mark.color= '$red'

but having no luck. Is this the right way to change the parameters of a mark component?

The structure of the plot is ui.form_card -> items -> ui.visualization -> ui.plot -> ui.mark

[vopani]

@AlexWennerDT Can you try this:
q.page['trend'].items[0].visualization.plot.marks[0].color = '$red'

The argument inside plot is marks and since it's a list, you need to choose the index of the mark to re-color.

[Alex-Wenner-FHR]

Thank you that worked!

[Alex-Wenner-FHR]

Hi! That line worked, but I am trying to conditionally change the plot points. I have this snippet of code:

I would have expected it to only turn the points of data that are in the .loc. However it turns all of the points on my graph red, any thoughts?

[vopani]

A better / cleaner approach might be to use color_domain and color_range.

[Alex-Wenner-FHR]

Hm, I was looking into that but was unsure what that would look like with a dataframe(s)

[vopani]

Try this:

import pandas as pd

from h2o_wave import site, data, ui

page = site['/demo']

df = pd.DataFrame({
    'toy': ['X0', 'X1', 'X2', 'X3', 'X4'],
    'height': [1, 2, 3, 4, 8],
    'coloring': ['red', 'green', 'red', 'green', 'blue']
})


page.add('example', ui.form_card(
    box='1 1 4 5',
    items=[
        ui.text_xl('Example'),
        ui.visualization(
            plot=ui.plot([ui.mark(type='interval', x='=toy', y='=height', color='=coloring',
                                  color_domain=['blue', 'green', 'red'], color_range='blue green red')]),
            data=data(fields='toy height coloring', columns=[df[col].to_list() for col in df.columns], pack=True)
        )
    ]
))

page.save()

[Alex-Wenner-FHR]

Thank you this is super helpful. I am trying to isolate a specific value in one of the columns. Would I just specify the color range and domain that specific value? Expecting it to color that data point different than the others?