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Rayne


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Active since 2015

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Exhaustively permutate a vector of size 20
Hi, I'm trying to exhaustively permutate a vector of size 20, but when I tried to use perms(v), I get the error Error u...

8 years ago | 1 answer | 0

1

answer

Question


Plot step function with y-axis in log-scale
Hi, How can I plot something like this? <</matlabcentral/answers/uploaded_files/49486/a.png>> I can only either use sem...

8 years ago | 1 answer | 0

1

answer

Question


Unable to create covariance matrix from random vector
Hi, I'm trying to build a Gaussian Mixture Model using random initializations and compare the results with one using Kmeans i...

9 years ago | 0 answers | 0

0

answers

Question


Storing a dynamic array of structures
I'm new to Matlab, and I want to do the following. I have 2500 data points that can be clustered into 10 groups. My aim is to...

9 years ago | 0 answers | 0

0

answers

Question


Display Fisherface after reducing dimensions using PCA
Hi, I'm learning to implement the Fisherface algorithm using Matlab. I understand that to deal with the singularity issue of ...

9 years ago | 0 answers | 0

0

answers

Question


Using non-negative matrix factorization (NMF) for facial recognition
Hi all, I'm interested to find out how to implement NMF for facial recognition. I understand that the NMF works by taking V, ...

9 years ago | 0 answers | 0

0

answers

Question


rbg2gray problem when reading .png files
I'm trying to run the PCA code downloaded from <http://www.mathworks.com/matlabcentral/fileexchange/17032-pca-based-face-recogni...

9 years ago | 1 answer | 0

1

answer

Question


Poor classification accuracy when using PCA
I'm trying to classify a set of images using PCA. The training set contains ~1800 images of 380 persons, each image with the per...

9 years ago | 0 answers | 0

0

answers

Question


K-means clustering - results and plotting a continuous curve
I am very new to Matlab, and I'm trying to classify some data using K-means. This is what I have: numClusters = 4; idx_1...

9 years ago | 2 answers | 0

2

answers