Evri faq

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Importing / Exporting

How do I concatenate multiple files into a single DataSet?

How do I create a multivariate image from separate images?

How do I export PCA scores and loadings to a text file (to read into MS Excel, for example)?

How do I import three-way data into Solo or PLS_Toolbox?

Why can't I import a Horiba NGC file on my 64-bit computer?

Why can't SPCREADR read multiple files I've selected?

Why do some Excel files fail to import?

General

Can I do PARALIND in PLS_Toolbox?

Can I install PLS_Toolbox (or Solo) on more than one PC, such as on my desktop and laptop computer?

Can I use multiple class sets (categorical variables) together in a SIMCA, PLSDA, or LDA model?

Can you give me more information on the R-Squared statistic?

How are RMSEC and RMSECV related to R2Y and Q2Y I see in other software?

Convergence of PARAFAC. How much variation between models is expected a particular PARAFAC is fit multiple times with the same settings?

Does the software stop working if my maintenance expires?

How and where do I report a problem with PLS_Toolbox?

How are T-contributions calculated?

How are the ROC curves calculated for PLSDA?

How are the error bars calculated for a regression model and can they be related to a confidence limit (confidence in the prediction)?

How can I improve performance with PLS_Toolbox and Matlab on the Mac platform?

How do I assign classes for samples in a DataSet?

How do I build a classification model from a class set other than the first?

How do I choose between the different cross-validation leave-out options?

How do I cite/reference Eigenvector?

How do I interpret the ROC curves and Sensitivity / Specificity plots from PLSDA?

How do I make a DataSet backwards compatible?

How do I obtain or use a recompilation license for PLS_Toolbox?

How do I use the "custom" cross-validation option?

I keep getting "out of memory" errors when analyzing my data. What can I do?

What can I do if I get a java.lang.OutOfMemoryError error?

Nonnegativity (PARAFAC, PARAFAC2, Tucker): Why do I get negative scores when all modes are set to nonnegativity?

What are "Relative Contributions"?

What are the "Reduced" T² and Q Statistics?

What are the units used for RMSEC and RMSECV when cross-validating PLSDA models? Why do the cross-validation curves look strange for PLSDA?

What do the four Fit/Unique Fit statistics mean in MCR and PARAFAC models?

What internal tests are used to select "suggested" number of PCs?

What is PLS1 vs PLS2 and how do I create separate PLS1 models when I have a multi-column y-block?

What is the difference between a loading and a weighting?

Why are some axis labels and titles on my axes upside-down when I'm viewing images in MIA_Toolbox?

Why can't I recompile the PLS_Toolbox functions?

Why do I get the warning/notice "Missing Data Found - Replacing with "best guess" from existing model. Results may be affected by this action."

Why does PLS_Toolbox have a "boxplot" function that conflicts with the Mathworks Statistics Toolbox function of the same name?

Why does R2014b give me "Error using matlab.ui.Figure... Cannot convert double value to a handle" (or similar)?

Command Line

Do I have to specify all the options to a function or only the ones that are different from the defaults?

How are the Q-residuals and Hotelling's T² values calculated for PLS models?

How do I automate PCA analysis for multiple images?

How do I calculate my own T² and Q limits?

How do I manually calculate the limits for scores?

How do I calculate scores from a PLS or PLSDA model?

How do I change the default options for a function?

How do I interpret the Misclassification results reported by crossval?

How do I make PlotGUI send its plot to a new figure and not overwrite the current figure?

How do I retrieve and display predictions from a model structure in the command window?

How do I specify all options on the same line that contains the call to a function?

How do I use specific known pure component spectra with MCR (Multivariate Curve Resolution)?

How does PCA cross-validation work in PLS_Toolbox and Solo and how do I set up the command-line options to best use it?

Where do I find a description of the parafac2 constraints?

Where do I find the regression vector (B) and regression intercept (B0) for a PLS or PCR model?