August 2018 Analysis of Growth of Matches on AncestryDNA

This post follows on from my May 2018 analysis of the rate of growth of my DNA matches on Ancestry between July 2017 and May 2018. I took another snapshot of all my DNA matches in August 2018. I’m interested in capturing: THE RATE OF GROWTH OF MATCHES THE DISTRIBUTION OF MATCHES BY SHARED CM … Read more August 2018 Analysis of Growth of Matches on AncestryDNA

Measuring Genealogical Similarity using the Jaccard Index

For some of the posts on this blog I’ll be using one way to measure the similarity of two sample sets of data. The statistic is called the Jaccard Index, or the Jaccard Similarity Coefficient. This post is a technical explanation of the calculation itself. The sets of data are the unique ancestral surnames of … Read more Measuring Genealogical Similarity using the Jaccard Index

How Many of My Ancestry Matches have Identical Trees copied between Accounts?

Something I find mildly disappointing with a new DNA match on Ancestry is when I realize that I’ve seen their tree before. The exact same identical tree. I’ll recognize this is the case if I’ve spent some considerable time studying the tree in a previous encounter from an earlier DNA match. What’s happening is that … Read more How Many of My Ancestry Matches have Identical Trees copied between Accounts?

The Top 10 Ancestral Surnames across my Ancestry DNA Matches Surprised Me

In May 2018 I downloaded the direct line ancestral surnames of all my DNA matches at Ancestry. I discussed some statistical analysis on the numbers in a previous post. I then conducted some exploratory data mining of the distribution of surnames across my matches. My paternal line is African (not African-American), and I have very … Read more The Top 10 Ancestral Surnames across my Ancestry DNA Matches Surprised Me

Measuring the Usefulness of Trees of my Ancestry DNA Matches

Previously I discussed an analysis of the availability of trees across all my DNA matches. The headline figures from May 2018 were 40% of my matches had a public linked tree 27% had no linked tree but had at least one public unlinked tree 7% had a private tree 26% had no tree A total … Read more Measuring the Usefulness of Trees of my Ancestry DNA Matches

How to count your total number of matches on AncestryDNA

This post is out of date, and does not reflect the current Ancestry website. There is a nicer quicker way of getting the count of Ancestry matches. Those of you who have been using Ancestry for a while will remember that once upon a time the display showed the total number of matches, but that … Read more How to count your total number of matches on AncestryDNA