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I am trying to add an x-axis with strings ((2,3,5,1),(11:30pm,12:00am,12:30am,1:00am)). I have seen an example that was done using pytgraph.GraphicsWindow() by addPlot(axisItems) Show string values on x-axis in pyqtgraph , but there is no addPlot for PlotWidget() to add a x-axis.

Quazi R
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GraphicsWindows inherits from GraphicsLayout and its addPlot method creates a PlotItem and then passes all its parameters to the PlotItem constructor.

The PlotWidget class wraps a single PlotItem and the PlotWidget constructor also passes its parameters to the PlotItem constructor.

Therefore you should just be able to pass the axisItems parameter to the PlotWidget constructor. Something like: 

myPlotWidget = PlotWidget(axisItems={'bottom': stringaxis})
titusjan
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  • Thanks titusjan, but if i pass stringaxis when initializing the PlotWidget, how do I update the stringaxis for new plot? – Quazi R Sep 12 '18 at 00:15
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    I have found a way to add string axis by using setTicks - myPlotWidget = PlotWidget() myPlotWidget.plot((1,2,3,4),(2,3,5,1)) myPlotWidget.getAxis('bottom').setTicks([[(1,"11:30pm"),(2,"12:00am"),(3,"12:30am"),(4,1:00am)]]) – Quazi R Sep 13 '18 at 19:15