等高线图未以 plotly python 显示

Question

我正在尝试使用 plotly python 绘制等高线图，但它不起作用，我得到一个空白图。

这是我的代码，

import plotly.graph_objects as go
import pandas as pd
import numpy as np

df = pd.read_csv('./temperature_2d.csv')
x = np.array(df.lon)
y = np.array(df.lat)
z = np.array(df.value).reshape(11, 87)
fig = go.Figure(data =
go.Contour(
    z=z,
    x=x, 
    y=y,
    colorscale = 'Hot',
    contours_coloring='heatmap'
))
fig.show()

这是我用来绘制的数据文件temperature_2d.csv

这是输出

我对绘图之类的东西完全陌生，如果有人能解释这里出了什么问题以及如何正确地做到这一点，那将非常有帮助

Answer 1

我没有直接绘图，而是先尝试对您的数据进行网格化。

import plotly.graph_objects as go
import pandas as pd
import numpy as np
from scipy.interpolate import griddata


df = pd.read_csv('./temperature_2d.csv')
x = np.array(df.lon)
y = np.array(df.lat)
z = np.array(df.value)


xi = np.linspace(x.min(), x.max(), 100)
yi = np.linspace(y.min(), y.max(), 100)

X,Y = np.meshgrid(xi,yi)
Z = griddata((x,y),z,(X,Y), method='cubic')



fig = go.Figure(data =
go.Contour(
z=Z,
x=xi,
y=yi,
colorscale = 'Hot',
contours_coloring='heatmap'
))
fig.show()

等高线图未以 plotly python 显示

Countor plot is not displaying in plotly python

python

contour

plotly