Problem with Cluster command

3 views (last 30 days)
When I ran the following three commands from the Statistics and Machine Learning Toolbox in the shown order, in my command window
Y = pdist(X)
Z - linkage(Y)
T = cluster(Z,'cutoff',1.2)
where X is 3042x53 matrix of type double, I get the following error (just after I execute statement 3) "Index in position 1 is invalid. Array indices must be positive integers or logical values." I then repeated these commands with a smaller X input (4x8). Same result. I believe that "cluster" wants integers for the first two columns of the Z input, (Z was produced by linkage) but the last column of Z is a distance measure and is real - so all columns of Z must be real. What am I doing wrong or misunderstanding?

Accepted Answer

Walter Johnson
Walter Johnson on 26 Jan 2020
Well thanks. It's something I will be looking out for now

More Answers (1)

Walter Roberson
Walter Roberson on 24 Jan 2020
Z = linkage(squareform(Y)) ;
Walter Roberson
Walter Roberson on 26 Jan 2020
It does happen a fair bit, most commonly with a variable named sum .

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!