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Hans van der Horn


Last seen: 1 month ago |  Active since 2017

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kmeans with centroids from previous analysis
Hello everyone, I wanted to confirm whether my approach is right. I have centroids from a previous kmeans analysis, and now I'd...

5 months ago | 2 answers | 0

2

answers

Question


how does aic work for stepwiseglm?
Dear colleagues, I'd like to ask a question about the stepwiseglm function. I was wondering how the aic criterion works exactl...

9 months ago | 1 answer | 0

1

answer

Question


rotated scores after varimax rotation
Dear all, I'd like to verify if my approach is right. I'd like to obtain rotated subject scores after varimax rotation. I...

1 year ago | 0 answers | 0

0

answers

Answered
sign of coefficients in eig
I'd like to comment on my own question. I'm analyzing functional MRI data, and extract the first eigenvector from 4D connectivi...

1 year ago | 0

| accepted

Question


sign of coefficients in eig
Dear experts, I am aware that the coefficients in PCA componentes are arbitrary (and can be flipped which still has the same me...

1 year ago | 1 answer | 0

1

answer

Question


edge effects in butterworth filter and hilbert transform
Dear experts, I am filtering an fMRI signal using a 7th order Butterworth filter (0.04-0.07 Hz), and after that I extract the p...

1 year ago | 0 answers | 0

0

answers

Question


cannot locate function plotInteraction
Dear all, I cannot locate the plotInteraction function. I have Matlab v. 2020a, and I see that the function was introduced in v...

2 years ago | 1 answer | 0

1

answer

Question


Reorder symmetric adjacency matrix
Dear all, I’d like to reorder a 10x10 adjacency matrix, based on node order. So for example, I’d like node 8 to be the first etc...

2 years ago | 1 answer | 0

1

answer

Question


how does fitglm treat categorical variables?
Dear all, I'd like to verify something about categorical variables in fitglm. As input I use a table which also contains catego...

2 years ago | 1 answer | 0

1

answer

Answered
Why do I get different results using fitglm and mnrfit for logistic regression
It depends on what you define as reference catagory (for mnrfit this is the last, i.e., the higstest number in the response vect...

2 years ago | 0

Question


Problem rank design matrix glme
Dear all, I encounter a problem with fitglme. I'm trying to fit the following model: y ~ age + sex + education + g2*time + ...

3 years ago | 0 answers | 0

0

answers

Question


fitlme longitudinal with multiple covariates
Hello all, I would like to conduct a lme with a response variable y, two fixed effects variables (group and timepoint), and 3...

3 years ago | 0 answers | 0

0

answers

Answered
memory pca vs pcacov
Dear Hiro, The problem is that by constructing the covariance matrix Matlab runs out of memory. Why does the pca.m function n...

3 years ago | 0

Answered
memory pca vs pcacov
Dear Hiro, Thanks for your answer. If I compute cov(my matrix) to get the input for pcacov I run out of memory. However, if I ...

3 years ago | 0

Question


memory pca vs pcacov
Dear all, I'm running a pca on a large matrix (33*500,000) and with pcacov I get a memory error, but pca gives me no trouble....

3 years ago | 3 answers | 0

3

answers

Question


Update Signal processing toolbox
Hello Mathworks, I have Matlab version 2017a. I would like to use functions of the Signal Processing Toolbox (pentropy.m) out o...

3 years ago | 1 answer | 0

1

answer

Question


calculate centroid after kmeans
Hi, Is it possible to retrospecively compute the centroids from the membership indices and the data after running kmeans? Than...

4 years ago | 1 answer | 0

1

answer

Question


How to adjust colors of animated plot3 over time
Hi, I would like to change colors over time in an animated plot. The way I do it right now is to run a loop over the datap...

4 years ago | 1 answer | 0

1

answer

Question


student version for residents
Dear Mathworks, Currently, I am appointed as a resident in Neurology at the University Hospital in Groningen, the Netherlands...

6 years ago | 0 answers | 0

0

answers