When data is plotted there is a padding between the first and last x points
by default.
For example, when I plot using the following, the first x axis value is
approximately 1e-3 rather than 0.
How can I plot the data so that xmin and xmax on the x axis correspond to
xmin and xmax of the plotted data? Do I have to manually set the x limits
or is there a setting for this?
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import pyqtgraph as pg
import numpy as np
import sys
class PlotWidget(pg.GraphicsLayoutWidget):
def __init__(self):
super().__init__()
self.myplot = self.addPlot()
self.viewbox = self.myplot.getViewBox() #correct method
self.myplot.showGrid(True,True, 1)
x = np.linspace(0,20e-3, 100)
y = 2*np.sin(2*np.pi*50*x)
curve = self.myplot.plot(x, y)
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
plot = PlotWidget()
sys.exit(app.exec_())
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