Andrew W. Rate

4 Questions 23 Answers 0 Followers

Questions related from Andrew W. Rate

Stepwise refinement of Linear Discriminant Analysis (LDA) models?

I have been playing around with stepwise refinement of Linear Discriminant Analysis (LDA) models for geochemical data - many variations are possible though.I am interested to know if anyone can...

21 August 2017 1,868 3 View

Has anyone compared the use of Sigma-2 and USGS "Angel Food" samplers for airborne particulates?

It would be useful to know if one design has any advantages over the other, or just your experience of using these samplers. I'm interested in major and trace element analyses on the airborne dust...

16 April 2014 5,241 0 View

To what degree should compositional data from partial extractions be considered closed data?

Partial extractions of regolith materials and soils often give concentrations an order of magnitude or more below total element concentrations. As a result, there may not be a constant-sum issue...

22 November 2013 217 2 View

Does anyone have any hints on spatial statistical analysis of poorly conditioned data?

For example, if the semivariogram is very noisy, or if semivariance seems to be higher at shorter distances than longer.

01 January 1970 9,162 2 View