Abstract
The use of multielement analytical techniques with ever-increasing power of discrimination and extremely low detection limits generates big and trustful geochemical datasets. To impress a geological meaning to these data, exploratory data analysis must follow an approach of gradual increase of complexity, beginning with simple techniques and then following to more high-end ones. Correlation diagram is a graphical method that couple groups of associated variables from a correlation matrix. Since its first proposal in 1965 by Krumbein and Graybill in the book “An Introduction to Statistical Model in Geology” this diagram remained almost forgotten in the literature, possibly due to wearisome and time consuming manual plotting procedures. We present in this paper the EzCorrGraph app, written in HTML5 and JavaScript language, which generates the correlation diagram from a correlation matrix or a list of pairs with a simple and straightforward approach. To validate the results and routines, we compared diagrams generated by the app with some existing diagrams in the literature. The app is freely available on https://ezcorrgraph.firebaseapp.com/.
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