Python3.x+pyqtgraph實皇冠現(xiàn)體育網(wǎng)站開發(fā)數(shù)據(jù)可視化-創(chuàng)新互聯(lián)
1、pyqtgraph庫數(shù)據(jù)皇冠體育網(wǎng)站開發(fā) haozbbs.com Q1446595067可視化效果還不錯，特別是窗體程序中圖像交互性較好；安裝也很方便，用 pip 安裝。
2、在Python中新建一個 .py 文件，然后寫入如下代碼并執(zhí)行可以得到官方提供的很多案例（含代碼），出現(xiàn)如下界面圖像：
import pyqtgraph.examples
pyqtgraph.examples.run()圖1
圖2
圖3
4、程序默認是黑色背景，這個是可以修改的。比如，在程序的開頭部分寫入如下代碼就可以修改背景：
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')更多說明，見 pyqtgraph 官網(wǎng)：http://www.pyqtgraph.org/documentation/style.html，“Line, Fill, and Color”部分的“Default Background and Foreground Colors”部分。
5、一個修改背景顏色的完整案例如下，可以直接運行程序：
import numpy as np
import pyqtgraph as pg
from pyqtgraph.Qt import QtGui, QtCore
# 如下2行代碼是我自己加入的，目的是修改默認的黑色背景為其它顏色背景
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')
from pyqtgraph.Point import Point
#generate layout
app = QtGui.QApplication([])
win = pg.GraphicsWindow()
win.setWindowTitle('pyqtgraph example: crosshair')
label = pg.LabelItem(justify='right')
win.addItem(label)
p1 = win.addPlot(row=1, col=0)
p2 = win.addPlot(row=2, col=0)
region = pg.LinearRegionItem()
region.setZValue(10)
# Add the LinearRegionItem to the ViewBox, but tell the ViewBox to exclude this
# item when doing auto-range calculations.
p2.addItem(region, ignoreBounds=True)
#pg.dbg()
p1.setAutoVisible(y=True)
#create numpy arrays
#make the numbers large to show that the xrange shows data from 10000 to all the way 0
data1 = 10000 + 15000 * pg.gaussianFilter(np.random.random(size=10000), 10) + 3000 * np.random.random(size=10000)
data2 = 15000 + 15000 * pg.gaussianFilter(np.random.random(size=10000), 10) + 3000 * np.random.random(size=10000)
p1.plot(data1, pen="r")
p1.plot(data2, pen="g")
p2.plot(data1, pen="w")
def update():
region.setZValue(10)
minX, maxX = region.getRegion()
p1.setXRange(minX, maxX, padding=0)
region.sigRegionChanged.connect(update)
def updateRegion(window, viewRange):
rgn = viewRange[0]
region.setRegion(rgn)
p1.sigRangeChanged.connect(updateRegion)
region.setRegion([1000, 2000])
#cross hair
vLine = pg.InfiniteLine(angle=90, movable=False)
hLine = pg.InfiniteLine(angle=0, movable=False)
p1.addItem(vLine, ignoreBounds=True)
p1.addItem(hLine, ignoreBounds=True)
vb = p1.vb
def mouseMoved(evt):
pos = evt[0] ## using signal proxy turns original arguments into a tuple
if p1.sceneBoundingRect().contains(pos):
mousePoint = vb.mapSceneToView(pos)
index = int(mousePoint.x())
if index > 0 and index < len(data1):
label.setText("x=%0.1f, y1=%0.1f, y2=%0.1f" % (mousePoint.x(), data1[index], data2[index]))
vLine.setPos(mousePoint.x())
hLine.setPos(mousePoint.y())
proxy = pg.SignalProxy(p1.scene().sigMouseMoved, rateLimit=60, slot=mouseMoved)
#p1.scene().sigMouseMoved.connect(mouseMoved)
## Start Qt event loop unless running in interactive mode or using pyside.
if __name__ == '__main__':
import sys
if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
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文章標題：Python3.x+pyqtgraph實皇冠現(xiàn)體育網(wǎng)站開發(fā)數(shù)據(jù)可視化-創(chuàng)新互聯(lián)
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