Secondary Predictor View

View models as a graph. Define time steps to obtain a prediction on parameter values according to the selected estimated model and environmental conditions.


Visualizes secondary models and the predicted parameter values.

Mouse zoom: To view a part of the graph in detail left click and simultaneously drag the mouse right and down. Another way is to use the zoom options in the context menu.

Context Menu (Right click in the graph):
Properties: Change font (type, size, color) and labels as well as the appearance of the graph. These changes are lost as soon as the options dialog is closed. To save a graph with changed properties (e.g. for a publication) use the "Save as..." option in the context menu.
Copy: Copies the graph to the clipboard enabling you to paste it in a graphical editor.
Save as...: Saves the graph as PNG (a bitmap image) or as SVG (a vector image). Compared to the PNG image in the outport (which has a resolution of 640x480 pixels) this PNG is saved with the same size as on the screen.
Print: Print the graph directly from Knime PMM-Lab.
Zoom: Zoom in and out or auto range the view for one or both axes.
Display Options
Draw Lines: No function
Display Highlighted Row: If checked, only the highlighted row in the table is displayed. A comfortable way to select sets of data is to highlight a row and then navigate with the arrow keys (up/down) through the table. Using the keyboard, the space bar can be used to select/unselect a set of data.
Show Legend: Display the parameter name together with symbol and color.
Add Info in Legend: Adds to the legend the name of the formula with which the secondary model was estimated. This option is only available when the legend is displayed.
Export as SVG: If checked, the graph outport contains a SVG file and not a PNG file after execution of the node.
Show Confidence Interval: Computes and displays confidence intervals. This is computed live and for all displayed models at once. For details about the calculation of the confidence interval please see Tijskens, Hertog, Nicolai (eds) (2001): "Food Process Modelling". Woodhead Publishing Limited and CRC Press LLC.
Check the box to set the minimum and maximum values for x and y axes.
Variables on Display
X and Y: Displays the heading of the displayed data column. Changing units automatically reformats the axes.
X: If more than one environmental condition was added via the Conditions menu the one to be displayed on the x-axis can be defined here.
Y: The parameter to be displayed on the y-axis is set in the left table and cannot be changed here.
X Unit: Changing units automatically reformats the axes.
Y Unit: Units for parameters cannot be changed.
X and Y Transform: Transforms the data on the X and Y axis (square root, ln, log10, basis e, basis 10). This is useful if a display of data other than the PMM-Lab default (log10) is wished for (e.g. as actual cell counts -> 10^).
Other Variables
If a parameter is dependent on more than one environmental condition (e.g. temperature and pH-value), values can be adjusted here by changing the position of the slider or by entering a number into the textbox.
Filter the rows in the table to be displayed for the model status:
Ok = fitting successful;
No Covariance Matrix = Confidence intervals cannot be calculated. Editing the expert settings in the Model Fitting node or choosing a different formula may help;
Coeff out of limit = The fitting was successful, but only because the minimum/maximum values of the parameters given in the model formula were ignored;
Failed = Fitting was not successful. Editing the expert settings in the Model Fitting node or choosing a different formula may help.
Click on 'Customize' to select the columns to be displayed, e.g. model name, quality criteria (R2, AIC) and assay conditions (temperature, pH, aW).
'Set optimal width' changes the width of the columns such that the whole text is visible in each cell.
Left Table
The table shows the estimated models for parameters, whether they are currently being displayed (selected), the color and shape of the symbol and other information (see "Columns"). Clicking on a column header sorts the rows. To change the order of the columns drag the column headline. This is temporarily and not saved when the node dialog is closed.
Right Table
Values can be entered into the first column. For these environmental conditions parameter values are predicted according to the estimated model chosen in the left table. Results can be entered into spreadsheets and text files via copy and paste.
Set equidistant steps facilitates the entry of evenly distributed values. The unit is the same as on the x-axis in the graph and can be changed in the 'Variables on Display' section. If 'Inverse' is checked, y-Axis values can be entered and the software tries to find the corresponding x-Axis value.

Input Ports

Fitted secondary models and parameters (e.g. from the nodes Model Fitting, Model Reader, XLS Model Reader, Model Creator)

Output Ports

Graph with predicted parameter values; the image is a PNG file (default) or a SVG file (see section 'Display Options')

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