How the set the scale of y axis uneven?

📊 Plotly Python
1

Hi, I want to set the scale of y axis uneven, which means the different value intervals for the same plotting intervals. See the picture below as an example.

image
image699×368 573 Bytes

2

Hi @HaoXu

you mean changing the tickvalues?

import plotly.graph_objects as go

# trace
trace = go.Scatter(
    x=[10, 20, 30, 40],
    y=[10, 20, 30, 40],
    mode='markers+lines'
)

# base figure
fig=go.Figure(data=trace)

# update yaxis
fig.update_yaxes(
    tickvals=[10, 20, 30, 40],
    ticktext=[100, 2000, 30000, 400000]
)

# update height and width for clarity
fig.update_layout({'width': 400, 'height': 400})
fig.show()

Result:
newplot(6)

3

Hi, thanks for your replying. But I dont think this is what I want. Actually, I need to plot two variables by barplot at each of the positive and negative y axis. But the range of the values of these two variables is quite different, such as the positive one is from 0 to 20, but the negative one is from 0 to -3000. So, if the equidistant y axes are used, then the postive one will not be shown clearly. So I want to set the y axes inequidistant. For example, at the postive y axis, one pixel means 1 value, but at the negative side, one pixel 10 value.

4

Hi,

if the built in logarithmic axis type does not help in this case, I guess you will have to transform your data in an appropiate way before plotting.

5

Yeah, that’s also a way. I have done like that.