[X profile][PCA-loadings][PLS-loadings][PLS-partial weights][PLS-coefficients]
All the commands in this submenu start a 2D plot application except X-profile, which starts a profile application. Follow these link for a full description of theirs options and commands.
Notice that this is a "tear-off menu", if you click on the dotted line on top of the menu you will transform the submenu in an independent window which will remain open until you specifically close it. This allows a fast access to the plots and is particularly useful when you plan to open many plots at the same time.
An X profile is a representation of all the values present in the dataset, in which the variables are represented from left to right in horizontal axis. For each variables, the plot represents as many points as objects are in the dataset, for which the vertical position represent its actual value.
X profiles are a useful tool for a fast inspection of the data. It allows to identify outliers, differences in the scale of different blocks of data. presence of very large values, etc... Profiles are represented using a devoted application (profile), slightly different from other 2D plots, including some features for an easier visualization of the data.
This command starts prompting the user for the blocks of data to show in the plot:
Choose block/s of var:
Select the blocks of X variables which should be represented in the profiles. The blocks containing variables of type Y (dependent variables) or N (inactive variables) can not be represented and therefore can not be selected.
When the right block were selected press the OK button, or press the Cancel button to abort the operation.
Plot>>>profiles>>>PCA-loadings
Plot>>>profiles>>>PLS-loadings
Plot>>>profiles>>>PLS-partial weights
Plot>>>profiles>>>PLS-coefficients
These command produce a profile representation of the corresponding chemometrical values. These profiles are essentially 2D Variables plots where the variables are represented ordered from left to right in the horizontal axis. The profiles are represented using the 2D plot application.
First, the User is prompted to choose the component (for PCA loading, PLS loading and PLS weights) or model dimensionality (for PLS coefficients) which will be represented in the profile.
It is possible to highlight single variable blocks by plotting in red the symbol for the variables of this block. The number which appear by the side of the check boxes corresponds to the number of the variable block defined in File>>>Type of variables>>>Modify.
When the dialog window shows the desired settings press the OK button and the profile will be displayed. Press the Cancel button to abort the command.