Scatter graph's Y axis always starting at 0

Question

I'm getting a Plotly issue.

I need my scatter graph's Y axis to always start at 0. The graph object is created and returned by an auxiliary function as follows:

[go.Scatter(x=time_index,
            y=self.data,
            name=self.data.name
              )]

And then this function returns it and there is another function that actually generates the graph in a dash object, because it is a web application that I need this for.

The thing is that I need to know if there is some attribute inside the go.Scatter object that I can edit in order to always get the Y axis to start at 0.

As you can see in the image below, the Y axis starts at 10k rather than at 0.

Answer 1

As far as I know it's not possible to set this property in the go.Scatter object directly, but there is a layout parameter called rangemode wich you can set to 'tozero':

fig.update_yaxes(rangemode="tozero")