class_docstr: Generates a plot curve from x/y data
class_docstr_tok: ["Generates","a","plot","curve","from","x\/y","data"]
code: def process(self, x, y, display=True):
      # print "scatterplot process"
      if not display:
          return {"plot": None}
  
      self.item.setData(x, y, pen=self.ctrls["color"].color())
      return {"plot": self.item}
  
imports: import numpy
  from ...None import ComboBox, PlotDataItem
  from ...graphicsItems.ScatterPlotItem import ScatterPlotItem
  from ...Qt import QtCore, QtGui, QtWidgets
  from ..Node import Node
  from .common import CtrlNode
label_desc: Use image node_id 2 for calling the PlotCurve obj's underlying member method code with example usage: obj.process(x, y, display) and returns: dict, dict