Basic Radar Chart with Dash

[ruslaniv]

Hi!
I’ve been trying to follow up this tutorial here:

Radar Charts

It does not seem very difficult, but I’m getting completely different results.
I have this:

r = [28, 81, 4, 3]
theta = [19498, 9144, 6245, 799]

r is number of visits
theta is ID’s
So I build my chart like this in a callback function:

data = [go.Scatterpolar(r=r, theta=theta, fill='toself')]
layout = go.Layout(polar=dict(radialaxis=dict(visible=True),), showlegend=True)
return {'data': data,'layout': layout}

and I get nothing similar to the chart I see at the section “Basic Radar Chart with go.Scatterpolar”
I get this:

What do I need to do to achieve the chart that is shown in the tutorial, where I’d have ID’s instead of degrees and the markers correctly reflecting the number of visits?

[RenaudLN]

You need the angular axis to be of type category. You can either define it in the figure’s layout or change your IDs from numbers to strings:

theta = ["19498", "9144", "6245", "799"]

[ruslaniv]

Hmmm, I explicitly set the lists in my function body to:

r = [28, 81, 4, 3]
theta = ["19498", "9144", "6245", "799"]

but I’m still getting:

[RenaudLN]

Alright, then go for the second option:

layout = go.Layout(
    polar=dict(
        radialaxis=dict(visible=True),
        angularaxis=dict(type="category")
    ),
    showlegend=True
)

[ruslaniv]

That worked perfectly, and I did not even have to set the theta values to strings.