| CChart Class |
CChart is a c-chart for monitoring the count of the number of defects when defects are rare.
Control limits are computed using the Poisson distribution.
If defects are not rare NpChart should be used instead.
Inheritance HierarchySystemObject
Imsl.Chart2DAbstractChartNode
Imsl.Chart2DChartNode
Imsl.Chart2DData
Imsl.Chart2D.QCShewhartControlChart
Imsl.Chart2D.QCCChart
Imsl.Chart2DAbstractChartNode
Imsl.Chart2DChartNode
Imsl.Chart2DData
Imsl.Chart2D.QCShewhartControlChart
Imsl.Chart2D.QCCChart
Namespace: Imsl.Chart2D.QC
Assembly: ImslCS (in ImslCS.dll) Version: 6.5.2.0
SyntaxThe CChart type exposes the following members.
ConstructorsMethods| Name | Description | |
|---|---|---|
 | AddCenterLine |
Adds the center line to the control chart
and returns the newly added line.
(Inherited from ShewhartControlChart.) |
| AddControlLimit |
Adds a control limit to the chart.
These can be used as tolerance limit lines or warning control limit lines.
(Inherited from ShewhartControlChart.) |
| AddLowerControlLimit |
Creates lower ControlLimit,
adds it to the control chart,
and returns the newly created object.
(Inherited from ShewhartControlChart.) |
| AddUpperControlLimit |
Creates upper ControlLimit,
adds it to the control chart,
and returns the newly created object.
(Inherited from ShewhartControlChart.) |
| AddWecoLimits |
Adds lines for the Western Electric Company Rules.
(Inherited from ShewhartControlChart.) |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| FirePickListeners |
Invokes the pick delegates defined at this node and at all of its
ancestors, if the event "hits" the node.
(Inherited from ChartNode.) |
| GetAttribute |
Gets the value of an attribute.
(Inherited from AbstractChartNode.) |
| GetBooleanAttribute |
Convenience routine to get a Boolean-valued attribute.
(Inherited from AbstractChartNode.) |
| GetChildren |
Gets the list of child nodes.
(Inherited from ChartNode.) |
| GetColorAttribute |
Convenience routine to get a Color-valued attribute.
(Inherited from AbstractChartNode.) |
| GetComponent |
Gets the "Component" attribute value.
(Inherited from ChartNode.) |
| GetConcatenatedViewport |
Returns the value of the "Viewport" attribute concatenated with the
"Viewport" attributes set in its ancestor nodes.
(Inherited from ChartNode.) |
| GetDoubleAttribute |
Convenience routine to get a Double-valued attribute.
(Inherited from AbstractChartNode.) |
| GetFillPaint |
Returns the "FillPaint" attribute value.
(Inherited from ChartNode.) |
| GetGradient |
Returns the value of the "Gradient" attribute.
(Inherited from ChartNode.) |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetIntegerAttribute |
Convenience routine to get an Integer-valued attribute.
(Inherited from AbstractChartNode.) |
| GetLineDashPattern |
Returns the "LineDashPattern" attribute value.
(Inherited from ChartNode.) |
| GetMarkerDashPattern |
Returns the "MarkerDashPattern" attribute value.
(Inherited from ChartNode.) |
| GetSampleSize |
Returns the value of the attribute "SampleSize".
(Inherited from ShewhartControlChart.) |
| GetScreenViewport |
Returns the value of the "Viewport" attribute scaled by the screen
size.
(Inherited from ChartNode.) |
| GetStringAttribute |
Convenience routine to get a String-valued attribute.
(Inherited from AbstractChartNode.) |
| GetTitle |
Returns the value of the "Title" attribute.
(Inherited from ChartNode.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| GetViewport |
Returns the value of the "Viewport" attribute.
(Inherited from ChartNode.) |
| GetWebComponent |
Gets the "Component" attribute value.
(Inherited from ChartNode.) |
| GetX |
Returns the "X" attribute value.
(Inherited from AbstractChartNode.) |
| GetY |
Returns the "Y" attribute value.
(Inherited from AbstractChartNode.) |
| IsAncestorOf |
Determines if this node is an ancestor of the argument node.
(Inherited from AbstractChartNode.) |
| IsAttributeSet |
Determines if an attribute is defined (may have been inherited).
(Inherited from AbstractChartNode.) |
| IsAttributeSetAtThisNode |
Determines if an attribute is defined in this node (not inherited).
(Inherited from AbstractChartNode.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| OnPick |
Invokes delegates registered with the Pick event.
(Inherited from ChartNode.) |
| Paint |
Paints this node and all of its children. This is normally called only
by Paint in this node's parent.
(Inherited from ShewhartControlChart.) |
| PrePaint |
Setup chart with current settings.
(Overrides ChartNodePrePaint.) |
| Remove |
Removes the node from its parents list of children.
(Inherited from AbstractChartNode.) |
| RemoveControlLimit |
Removes a control limit from the chart.
(Inherited from ShewhartControlChart.) |
| SetAttribute |
Sets an attribute.
(Inherited from AbstractChartNode.) |
| SetData(Double) |
Sets the data in the control chart.
By default, the data points are drawn as filled circle markers
connected by a line.
(Inherited from ShewhartControlChart.) |
| SetData(Int32) |
Sets the integer data in the control chart.
(Inherited from ShewhartControlChart.) |
| SetDataRange |
Update the data range,
range = {xmin,xmax,ymin,ymax} (Inherited from ShewhartControlChart.) |
| SetFillPaint(Brush) |
Sets the value of the "FillPaint" attribute.
(Inherited from ChartNode.) |
| SetFillPaint(Image) |
Sets the "FillPaint" attribute value.
(Inherited from ChartNode.) |
| SetFillPaint(Uri) |
Sets the "FillPaint" attribute value.
(Inherited from ChartNode.) |
| SetGradient(Color) |
Sets the value of the "Gradient" attribute.
(Inherited from ChartNode.) |
| SetGradient(Color, Color, Color, Color) |
Sets the value of the "Gradient" attribute.
(Inherited from ChartNode.) |
| SetLineDashPattern |
Sets the "LineDashPattern" attribute value.
(Inherited from ChartNode.) |
| SetMarkerDashPattern |
Sets the "MarkerDashPattern" attribute value.
(Inherited from ChartNode.) |
| SetSampleSize(Int32) |
Sets the value of the attribute "SampleSize"
when there is only a single sample size.
(Inherited from ShewhartControlChart.) |
| SetSampleSize(Int32) |
Sets the value of the attribute "SampleSize".
Its default value is an array of length one containing a one,
(new int[]{1}).
(Inherited from ShewhartControlChart.) |
| SetTitle(String) |
Sets the value of the "Title" attribute.
(Inherited from ChartNode.) |
| SetTitle(Text) |
Sets the value of the "Title" attribute.
(Inherited from ChartNode.) |
| SetViewport(Double) |
Used to specify the viewport location.
(Inherited from ChartNode.) |
| SetViewport(Double, Double, Double, Double) |
Used to specify the viewport location.
(Inherited from ChartNode.) |
| SetX(Object) |
Sets the "X" attribute value.
(Inherited from AbstractChartNode.) |
| SetX(Double) |
Sets the x-coordinates of the data.
The "X" chart attribute of each ControlLimit
added to this chart is also set.
If not set, the values 0, 1, 2, ... are used.
(Inherited from ShewhartControlChart.) |
| SetY |
Sets the "Y" attribute value.
(Inherited from AbstractChartNode.) |
| ToString |
Returns the name of this chart node.
(Inherited from AbstractChartNode.) |
Fields| Name | Description | |
|---|---|---|
 | WebCtrl |
A bool indicating if this ChartNode is a
WebControl.
(Inherited from ChartNode.) |
Properties| Name | Description | |
|---|---|---|
 | AbstractParent |
Indicates the parent of this AbstractChartNode.
(Inherited from AbstractChartNode.) |
| ALT |
Used to construct an "alt" attribute value in client side image maps.
(Inherited from ChartNode.) |
| AutoscaleInput |
Indicates what inputs are used for autoscaling.
(Inherited from AbstractChartNode.) |
| AutoscaleMinimumTimeInterval |
Specifies the minimum tick mark interval for autoscaled time axes.
(Inherited from AbstractChartNode.) |
| AutoscaleOutput |
Specifies what attributes to change as a result of autoscaling.
(Inherited from AbstractChartNode.) |
| Axis |
Typically provides a mapping for children from the user coordinate
space to the device (screen) space.
(Inherited from ChartNode.) |
| Background |
The base graphic layer displayed behind other ChartNode
objects in the tree.
(Inherited from ChartNode.) |
| BarGap |
Specifies the gap between bars in a group.
(Inherited from ChartNode.) |
| BarType |
Specifies the orientation of the BarChart.
(Inherited from ChartNode.) |
| BarWidth |
The width of all of the groups of bars at each index.
(Inherited from ChartNode.) |
| Center |
The value of the attribute "Center".
This is used to position the center line.
(Inherited from ShewhartControlChart.) |
| CenterLine |
The center line.
(Inherited from ShewhartControlChart.) |
| Chart |
This is the root node of the chart tree.
(Inherited from ChartNode.) |
| ChartTitle |
Specifies a title for the chart.
(Inherited from ChartNode.) |
| ClipData |
Specifies whether the data elements are to be clipped to the current
window.
(Inherited from ChartNode.) |
| ControlData |
The Data object for the control data.
(Inherited from ShewhartControlChart.) |
| CultureInfo |
Adds support for Windows supported locales.
(Inherited from AbstractChartNode.) |
| CustomTransform |
Allows for the specification of a custom transform.
(Inherited from AbstractChartNode.) |
| DataType |
Specifies how the data is to be rendered.
(Inherited from ChartNode.) |
| Density |
Specifies the number of minor tick marks in the interval between
major tick marks.
(Inherited from AbstractChartNode.) |
| DoubleBuffering |
Specifies whether double is active.
(Inherited from ChartNode.) |
| Explode |
Specifies how far from the center pie slices are drawn.
(Inherited from ChartNode.) |
| FillColor |
Specifies a color that will be used to fill an area.
(Inherited from AbstractChartNode.) |
| FillOutlineColor |
Specifies a color that will be used to outline this node.
(Inherited from ChartNode.) |
| FillOutlineType |
Specifies a fill pattern type for the outline of this node.
(Inherited from ChartNode.) |
| FillType |
Specifies a fill pattern type for this node.
(Inherited from ChartNode.) |
| Font |
Defines a particular format for text, including font name, size, and
style attributes.
(Inherited from AbstractChartNode.) |
| FontName |
Specifies the font to be used by name.
(Inherited from AbstractChartNode.) |
| FontSize |
Specifies the font size.
(Inherited from AbstractChartNode.) |
| FontStyle |
Specifies the font style to be used.
(Inherited from AbstractChartNode.) |
| HREF |
Used to specify an "activated" object in an image map.
(Inherited from ChartNode.) |
| ImageAttr |
An image that is to rendered when this ChartNode is displayed.
(Inherited from ChartNode.) |
| IsVisible |
Specifies if this node and its children will be drawn.
(Inherited from AbstractChartNode.) |
| IsWebControl |
Indicates whether this is a web control.
(Inherited from ChartNode.) |
| LabelType |
Specifies the type of label to display.
(Inherited from AbstractChartNode.) |
| Legend |
Legend information associated with this ChartNode.
(Inherited from ChartNode.) |
| LineColor |
Specifies the line color for this node.
(Inherited from AbstractChartNode.) |
| LineWidth |
Specifies the line width for this node.
(Inherited from AbstractChartNode.) |
| LowerControlLimit |
The lower control limit.
(Inherited from ShewhartControlChart.) |
| MarkerColor |
Specifies what color will be used when rendering marker.
(Inherited from AbstractChartNode.) |
| MarkerSize |
Specifies the size of markers.
(Inherited from AbstractChartNode.) |
| MarkerThickness |
Specifies the line thickness to be used when rendering the markers.
(Inherited from ChartNode.) |
| MarkerType |
Specifies the type of data marker to be drawn.
(Inherited from ChartNode.) |
| MeanSampleSize |
Value of the attribute "MeanSampleSize", the average sample size.
(Inherited from ShewhartControlChart.) |
| Name |
Specifies the name of this node.
(Inherited from AbstractChartNode.) |
| Number |
Specifies the number of tick marks along an axis.
(Inherited from AbstractChartNode.) |
| Parent |
Indicates the parent of this ChartNode.
(Inherited from ChartNode.) |
| Reference |
Indicates the baseline in drawing area charts.
(Inherited from ChartNode.) |
| ScreenAxis |
Provides a default mapping from the user coordinates [0,1] by [0,1]
to the screen.
(Inherited from ChartNode.) |
| ScreenSize |
Indicates the size of this ChartNode.
(Inherited from ChartNode.) |
| Size |
Specifies the drawing size.
(Inherited from ChartNode.) |
| SkipWeekends |
Specifies whether to skip weekends.
(Inherited from AbstractChartNode.) |
| SmoothingMode |
Specifies the SmoothingMode for this node.
(Inherited from AbstractChartNode.) |
| TextAngle |
An angle, in degrees, at which text is to be drawn.
(Inherited from ChartNode.) |
| TextColor |
Specifies the text color.
(Inherited from AbstractChartNode.) |
| TextFormat |
Specifies the "TextFormat" attribute value.
(Inherited from AbstractChartNode.) |
| TextFormatProvider |
Specifies the "TextFormatProvider" attribute value.
(Inherited from AbstractChartNode.) |
| TickLength |
This scales the length of the tick mark lines.
(Inherited from AbstractChartNode.) |
| ToolTip |
Text that can be displayed in the case where tool tips are used.
(Inherited from ChartNode.) |
| Transform |
Specifies whether the axis is linear, logarithmic or a custom
transform.
(Inherited from AbstractChartNode.) |
| UpperControlLimit |
The upper control limit.
(Inherited from ShewhartControlChart.) |
Events| Name | Description | |
|---|---|---|
 | PickPerformed |
Occurs when the mouse pointer is over a chart node and a mouse button is pressed.
(Inherited from ChartNode.) |
RemarksThe control limits are at
is the mean number of defects per sample
and k is the value of the "ControlLimit" attribute for the line.By default, the chart contains
an upper control limit line with k=3,
a lower control limit line with k=-3,
and a central line equal to .
Additional control limits can be added.
The method AddWeco adds control limits with
k = -2, -1, 1, 2.
The lower control limit is computed using the Poisson distribution. First the probability of the number of defects being less than k (the "ControlLimit" value) standard deviations from the mean in a normal distribution is computed. The number of defects required to produce the same probability assuming a Poisson distribution, with the same mean, is then computed. The lower limit is set to be one more than this number of defects.
See Also