Create README.md

Author: Arnaud Varin

README.md

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+# Scatter Plot Matrix Mod for TIBCO Spotfire®
+
+<img src="assets/scatterplotmatrix.png" width="60%"/>
+
+A relatively uncommon graphical tool that uses multiple scatterplots to determine the correlation (if any) between a series of variables. These scatterplots are then organized into a matrix, making it easy to look at all the potential correlations in one place.
+
+## Installation & Use
+
+[Download latest version](https://github.com/TIBCOSoftware/spotfire-mod-scatterplotmatrix/releases)
+
+The [Wiki](https://github.com/TIBCOSoftware/spotfire-mod-scatterplotmatrix/wiki) contains step-by-step instruction on how to install and use this Mod in TIBCO Spotfire®.
+
+## Building the Project
+
+In a terminal window:
+- `npm install`
+- `npm start`
+- `npm run server`
+
+## About Mods for TIBCO Spotfire®
+-   [TIBCO Community Exchange](https://community.tibco.com/s/global-search/%40uri#q=mod%20for%20tibco%20spotfire&t=Exchange&sort=date%20descending): A safe and trusted place to discover ready-to-use mods
+-   [Developer documentation](https://tibcosoftware.github.io/spotfire-mods/docs/): Introduction and tutorials for mods developers
+-   [Mods examples made by TIBCO](https://github.com/TIBCOSoftware/spotfire-mods/releases/latest): A public repository for examples projects