## How to calculate Y residual variance of Factor 0 for PLS cross validation regression ?

0## beta coefficients and Prediction

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2 months
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I find that PLS prediction using calibration model was the same (or very similar) as computation (prediction) using beta coefficients obtained from the same calibration model only for mean-centering modeling (or other regression models as well) only when without any preprocessing. However, when I ad…

## How to determine the optimal factor of PLS model

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2 months
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Just like I provided the Y explained variance of cross validation. The optimal factor is 8 that The Unscrambler gave. I want to know how to determine the optimal factor by calculation algorithm not by eyes. Thank you very much. Xudong …

## PLSR calibration of NIR spectra

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3 months
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Regarding to PLSR calibration of concentrations from NIR spectra, Let say, there are measurements at 200 wavelengths, then how many concentration measurements is suitable mathematically ? Minimum number, maximum number, optimal number. Please assume there are no colineaity problem. For example, is e…

## Error limits for PLSR model

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6 months
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When we built a PLSR model and use this model to make predictions, on the unscrambler we obtained RMSEP value which is basically Predicted Value-Reference Value. Can you please guide us as to how we should calculate the standard deviation or error limits for the RMSEP values?…

## Significance level for PLS regression coefficients

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10 months
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I would like to get a significance level (p-value) for the regression coefficients from PLS. Can Unscrambler calculate that?…

## Error bars in weighted beta coefficients plot

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10 months
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I am building Partial Least Square regression models (Tasks – Analyze – PLS) using the uncertainty test to find significant variables. After calculating the model it is possible to see the graphical version (graphical view) of the various results/ plots but also as a table (numerical view.) …