Question

我正在尝试绘制轮廓并且之前使用RGB元组指定颜色（所有轮廓只有一个） - 但是，现在我从to_rgba获得了一个ValueError：

ValueError: to_rgba: Invalid rgba arg "1"
to_rgb: Invalid rgb arg "1"
cannot convert argument to rgb sequence

以下是一个例子：

import numpy as np
import matplotlib.pyplot as plt
grid = np.random.random((10,10))
contours = np.linspace(0, 1, 10)

现在这个有效！

plt.contour(grid, levels = contours, colors = 'r')
plt.show()

但这不起作用！

plt.contour(grid, levels = contours, colors = (1,0,0))
plt.show()

我做错了什么或是Matplotlib中的这个错误（/新功能）？感谢。

Answer 1

正如评论中指出的那样，SELECT "SALES_ORDER_NUMBER", "SALES_ORDER_DATE" FROM "Sales Orders" WHERE "SALES_ORDER_DATE" BETWEEN '05/09/2016' AND '12-12-2016' ORDER BY "SALES_ORDER_NUMBER" ASC; SELECT "LASTNAME", FROM "Sales Orders" ORDER BY "LASTNAME" DESC; SELECT "SALES_ORDER_NUMBER","SALES_ORDER_DATE", "EMPLOYEE_LASTNAME", "DELIVERY_DUE_DATE", "DELIVERY_CHARGE" FROM "Sales Orders" ORDER BY "EMPLOYEE_LASTNAME" DESC;需要一系列颜色。如果要指定RGB元组，请将其作为此类序列的第一个元素。

plt.contour()

或

plt.contour(grid, levels = contours, colors = ((1,0,0),) )

Python / Matplotlib - ＆gt; to_rgba：无效的rgba arg

1 个答案: