The following types of plots are available for viewing and evaluating the estimation:
Cost function — Plot the
cost function value as it changes during estimation.
Measured and simulated —
Plot empirical data against simulated data.
Parameter trajectory — Plot
the parameter values as they change.
Residuals — Plot the error
between the experimental data and the simulated output.
When you run estimation, Parameter Estimation tool automatically displays a parameter trajectory plot that shows the change in the parameter values by iteration. However, you can create other plots for viewing the progress of the estimation before you begin estimating the parameters.
You can plot the measured data by clicking Add Plot on
the Parameter Estimation tab and selecting the
experiment to use for estimation under Experiment Plots of
the drop down list. You can then add the simulated response on top
of the measured data plot by clicking Plot Model Response on
the Parameter Estimation tab. Another way of
plotting the measured and simulated data is to right-click the experiment
name, for this example,
NewData, and select Plot
measured & simulated data from the list. The plot
looks like this:
You can see that the measured and simulated data do not match. You can edit the labels, adjust the limits, change the units, and the font style of the plot in the Property Editor. To launch the editor, right-click the experiment plot and select Properties from the list.
You can also add a plot for the expected estimation cost by
clicking Add Plot on the Parameter Estimation
tab and selecting Estimation Cost from the list.
You can close the message
"There is no data for ExpCost,
run the optimization to update the plot", by clicking
the left arrow toggle to the left of the message. The plot looks like
When you right-click the estimated parameters or expected cost plots, you can choose to add the scaled values or save iteration data from the list.
Add the progress plots by clicking the Add Plot button on the Parameter Estimation tab and selecting the plot in the list. Selecting Parameter Trajectory adds the following plot to the tool.
Use the View tab of the Parameter Estimation
tool to arrange the layout of the plots, so that
Iteration plot 1, and
plot 2 are all visible.
When you perform the estimation, all plots update automatically.