PlotCurveItem — pyqtgraph 0.9.8 documentation

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# PlotCurveItem

class `pyqtgraph.` `PlotCurveItem`(*args, **kargs)

  Class representing a single plot curve. Instances of this class are created automatically as part of PlotDataItem; these rarely need to be instantiated directly.

  Features:

  - Fast data update
  - Fill under curve
  - Mouse interaction

  Signals: |
  sigPlotChanged(self) | Emitted when the data being plotted has changed
  sigClicked(self) | Emitted when the curve is clicked

  `__init__`(*args, **kargs)

    Forwards all arguments to `setData`.

    Some extra arguments are accepted as well:

    Arguments: |
    parent | The parent GraphicsObject (optional)
    clickable | If True, the item will emit sigClicked when it is clicked on. Defaults to False.

  `setBrush`(*args, **kargs)

    Set the brush used when filling the area under the curve

  `setClickable`(s)

    Sets whether the item responds to mouse clicks.

  `setData`(*args, **kargs)

    Arguments: |
    x, y | (numpy arrays) Data to show
    pen | Pen to use when drawing. Any single argument accepted by `mkPen` is allowed.
    shadowPen | Pen for drawing behind the primary pen. Usually this is used to emphasize the curve by providing a high-contrast border. Any single argument accepted by `mkPen` is allowed.
    fillLevel | (float or None) Fill the area ‘under’ the curve to fillLevel
    brush | QBrush to use when filling. Any single argument accepted by `mkBrush` is allowed.
    antialias | (bool) Whether to use antialiasing when drawing. This is disabled by default because it decreases performance.
    stepMode | If True, two orthogonal lines are drawn for each sample as steps. This is commonly used when drawing histograms. Note that in this case, len(x) == len(y) + 1
    connect | Argument specifying how vertexes should be connected by line segments. Default is “all”, indicating full connection. “pairs” causes only even-numbered segments to be drawn. “finite” causes segments to be omitted if they are attached to nan or inf values. For any other connectivity, specify an array of boolean values.

    If non-keyword arguments are used, they will be interpreted as setData(y) for a single argument and setData(x, y) for two arguments.

  `setFillLevel`(level)

    Set the level filled to when filling under the curve

  `setPen`(*args, **kargs)

    Set the pen used to draw the curve.

  `setShadowPen`(*args, **kargs)

    Set the shadow pen used to draw behind tyhe primary pen. This pen must have a larger width than the primary pen to be visible.

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