PI Visualization Hackathon - Magion Scatterplot Matrix

The PI Visualization Hackathon entry of team MAGION is a Scatterplot Matrix, which allows basic statistical data research directly in Coresight.

When following a statistical course with R, I encountered the scatterplot matrix for the first time. The new custom symbol feature allowed me to create a similar statistic tool for Coresight. In addition this Hackathon is a great way to contribute to the community.

This tool will give you a visual overview for detecting data that might be related. Questions it will answer are:

• Is there a visual pattern that suggest correlation? How strong is this correlation?
• What does a regression line for XY look like, and what is the slope and intercept?
• What are the basis statistics for the data added to the plot? (mean, standard deviation, skewness)
• What effect has filtering the outliers on all above this?

Just for demonstrating purposes (not for the data) I picked the Mineral Processing example in AF, see screenshot below:

Features overview:

• No dependencies on external services or tooling like R or Azure ML or some external Rest API. It just works directly in Coresight with Asset Framework (or direcly PI data archive ) data exposed by the PIWebAPI.
• Remove outliers with the Mahalanobis distance and choose how strong this filter should be applied.
• Fit a linear regression line for each scatter plot and show the formula in a tooltip with the slope and the intercept
• Calculate the Pearson correlation and or the Spearman correlation
• Show basic statistics
• Auto scale the plot based on the width and the number of data sources added.
• Interpolation of data over given time range and interval. (In this example above the time range of 24 hours is equally divided by 184)
• Show tooltip with the data source path and data values

The above features in action are shown in the following video (Best viewed full screen with quality 1080p):

Github source:

GitHub - DaveGold/Magion-Scatterplot-Matrix: Magion Scatterplot Matrix - Custom Symbol for Coresight

Future extensions that could be interesting:

• Add more advanced data retrieval functions
• Add Hodrick Prescott filter for detrending the data
• Add Kendall correlation

I hope you like this symbol and if you have more idea's please leave a reply.

David Golverdingen

Senior Software Engineer

Magion Industrial Software Solutions