Enter your data for Response Trace Plot

Stat > DOE > Mixture > Response Trace Plot

Complete the following steps to specify the variables that you want to graph.

From Response, select the response variable that you want to plot.
Under Trace Direction, choose how to define the trace direction. If the reference point lies at the centroid, which is the default, the choice of the trace direction produces a difference in the plot only when the design space is constrained. For more information, go to Cox's and Piepel's component directions through the design space.
- Cox (proportion): When the design space is constrained, Cox uses the vertex where the component is maximized over the unconstrained simplex.
- Piepel (pseudocomponent): When the design is constrained, Piepel's direction is defined in the L-pseudocomponent space. The direction is the line connecting the reference blend to the vertex where the component is maximized (i.e. equal to 1) in pseudocomponent units.
Under Model Fitted in, choose whether you want to refit the model in Proportions or Pseudocomponents. For more information, go to Amounts, proportions, and pseudo-components scales for representing the data in a mixtures design and What is a pseudo-component?.
Under Reference Blend, select how you want to define the reference blend.
- Centroid of vertices: Select to use the centroid (center point) of the experimental region as the reference blend.
- Row ID: Select to use a given design point as the reference blend, and then enter the worksheet row containing the design point.
- Coordinates: Select to specify reference blend coordinates, and then enter the values of the components for the selected reference blend in the box.