Formatting numbers one zero less with D3 (e.g. 15 -> 1.5)-CodePudding

Plotly uses D3 for

I need both axes ticks to have one zero less as my section dimensions are z=[0,30] km and x=[0,60] km. I know that if I change dx and dz to 1000 the problems is solved, but the gradient does not look smooth.

CodePudding user response：

Customization of the scale is made possible by setting the scale value and the numerical value or string for the scale.

import plotly.express as px
import numpy as np

# Spatial axes
dx, dz = 100, 100
x = np.arange(0, 60000, dx)
z = np.arange(0, 30000, dz)

[zz, xx]= np.meshgrid(z, x, indexing='ij')

# Velocity model
vel = 1000   0.032 * zz

fig = px.imshow(vel, labels=dict(x="x[km]", y="z[km]", color="Velocity (m/s)"), color_continuous_scale='RdBu')
fig.update_layout(title='Raytrace')

fig.update_xaxes(tickvals=np.arange(0,600,100), ticktext=np.arange(0,60,10))
fig.update_yaxes(tickvals=np.arange(0,300,50), ticktext=np.arange(0,30,5))

fig.show()