Cluster Your DNA Matches | GEDmatch TUTORIAL Genetic Genealogy

Learn how to use the GEDMatch website to clustering your DNA Matches. Clustering is a method of looking at how we are related to several matches and how they are related to each other.

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CHAPTERS

00:00 Introduction
00:34 Introducing the Clustering Tool
02:28 Changing the displays
03:13 Finding clusters in DNA Matches
04:15 How to Set Thresholds
05:27 The Final Chart
06:10 Changing the Size and Threshold
07:06 Clustering people in Multiple Clusters
09:13 Understanding Immersion
10:14 Saving the Page as an HTML File
12:10 Selecting Multiple Clusters

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✅ Let's connect:

#FamilyHistoryFanatics #geneticgenealogy #Gedmatch

[cathyc]

Definitely a must watch for anyone using the clustering tools on either Gedmatch or any other site. I can't wait for the next video on this!

[kerinstinear]

Fabulous tutorial. Thank you.! . You may have just helped further my research on a long standing mystery. See you when I come out of the rabbit hole!

[peterwhitehead]

Purchased these tools Andy and they are very good. I’ve now phased and my raw data is now a super kit

[maxtrenck]

Wow! I’m beginning my dive into the DNA study. I was unaware this existed. Thanks for the great presentation!

[mariacapaldi]

I so appreciate that RootsTech does the "Live Streaming" I have watched passed years and haven't been able to attend the Event. I am hopeful of attending at some point in my life, fingers crossed. I am still debating about the Virtual Pass..

[tjklassen]

Thank you for bringing this feature to my attention. I especially appreciate your comments related to endogenous ancestors - which is a perspective that I must continually deal with (100% endogenous) I'm curious to see how it reacts to my matches.

[wesleyjohnston]

Going to the 1to1 really matters -- I set my lower cM to 20, and the kit at the top of the largest cluster (By Cluster Size) shows 40.7 cM with me, but clicking on the 40.7 cM reveals "No shared DNA segments found". Dropping the 1to1 threshold from 7 cM to 3 cM reveals a lot of small shared DNA. I would like to have parameters not just for total cM but also for largest segment cM.

[bluesaris]

Myheritage now offers a similar tool. I was wondering, how is it grouping people in a cluster. What is the determining factor. To be in a cluster do you have to match with more then "x" amount of other people in the cluster etc?

[Iwalanijoy]

I tried clustering for the first time and the search came back with not enough kits to perform a cluster. How do I overcome this issue. I played the upper and lower thresholds but still got nothing.

[anna-karins]

Great video Is there a possibility to get the HTML output to a spreadsheet for example Excel?

[daveb]

I'm trying to obtain a cluster diagram that has a particular GEDmatch kit in it. The kit is a 10.8 cM match to the cluster kit person. I've tried several thresholds but fail to find the 10.8 cM in the clusters. What is the trick for forcing a particular match into the cluster? Thank you.

[gnarfgnarf]

You need to explain how to interpret the clusters.

[teetee]

When you use the compact segment tool; does all the color lines on the chromosome indicate a common ancestor? If so, is this similar to triangulation?

[LSBurchette]

Will there be a new video with the Hybrid Auto Segment?

[sandywallace]

Is there any way to use the clustering tool when you belong to one of the Gedmatch forums? I'd like to run it against my matches within a specific group.

[howardforer]

the gedmatch auto cluster tool no longer lets you enter a lower and upper threshold the largest lower # is 35 this doesn't work well for me due to endogamy can you please offer any suggestions? - thanks

[thomasmanson]

Andy, it looks to me that clustering will have the effect of losing matches that stood out previously because of the amount of match. For instance, my wife’s top match in the one to many was a relative that shared 130 cMs, and the second on her list was an 85. Then it dropped down t0 the 50s and 60s and kept dropping slowly (until I lost interest) LOL. So the clustering might miss a lot of potential due to the thresholds. Can you address that?

[junegenis]

I am Ashkenazi and when I used the defaults I got one huge cluster with 483 matches. Following your suggestion I change the thresholds to 20 and 30 which produced something more reasonable but which had some strange things as well. The first four cluster ranged from 2 per side to 4. The next 9 x 9 but it included both green and purple (lavender?) boxes. There were other clusters with mixed colors as well and colored boxes that seemed to be floating off on there own but might have really been another mixed color cluster I suppose. Then I got a huge cluster as you predicted. I thought that would be the last one but scanning further I got another bunch of small clusters after it. Some of these were also mixed colors. What can you make of this and what do you suggest I try next?

[peterb]

Hello can you please explain how to save clusters when there is no right click option to save on my version of Gedmatch please (I am in Australia) thanks

[MxGardiner]

Hello, I have been watching your videos, trying to find the biological parents of my great grandmother. I'm only missing two of my 16 second great grandparents. I'm still having a hard time determining who they are.