在pyqtgraph中沿y轴计数的直方图？

Question

pyqtgraph 示例包括如何使用沿 x 轴的变量和沿 y 轴的计数进行直方图，如下所示。有没有办法让变量沿 y 轴运行，计数沿 x 轴运行，fillLevel 填充到 y 轴？

import pyqtgraph as pg
from pyqtgraph.Qt import QtCore, QtGui
import numpy as np

win = pg.GraphicsWindow()
win.resize(800,350)
win.setWindowTitle('pyqtgraph example: Histogram')
plt1 = win.addPlot()

## make interesting distribution of values
vals = np.hstack([np.random.normal(size=500), np.random.normal(size=260, loc=4)])

## compute standard histogram
y,x = np.histogram(vals, bins=np.linspace(-3, 8, 40))

## notice that len(x) == len(y)+1
## We are required to use stepMode=True so that PlotCurveItem will interpret this data correctly.
curve = pg.PlotCurveItem(x, y, stepMode=True, fillLevel=0, brush=(0, 0, 255, 80))
plt1.addItem(curve)

Answer 1

PlotCurveItem 将始终填充到其自身坐标系内的水平线。所以如果你想让它填充到 y 轴，它必须旋转：

curve.rotate(90)