pca

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Working example of Principal Component Analysis? [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.[详细]

2023-03-06 23:05 分类：问答
Reversible Karhunen-Loeve Transform

I have a problem with implementing RKLT. I\'ve read through papers by P开发者_如何学Cengwei Hao and Qingyun Shi but i still have some questions. Has anybody seen an implementation of this transform?[详细]

2023-03-05 18:09 分类：问答
R - 'princomp' can only be used with more units than variables

I am using R software (R comm开发者_如何学编程ander) to cluster my data. I have a smaller subset of my data containing 200 rows and about 800 columns. I am getting the following error when trying kmea[详细]

2023-02-25 19:12 分类：问答
What are "clockwise" and "counter-clockwise" in matrix rotation?

MOVED: Moving this question to math.stackexchange.com and closing it. I\'m learning about the math invovled in PCA.For my purposes here, I\'m just trying to understand a 90° rotation matrix.I g[详细]

2023-02-19 13:48 分类：问答
How to plot a line on a biplot made from PCA coeff and score data?

I\'m creating biplots of PCA data using the coeff and score outputs. I am looking to draw aline between the furthest points on the biplot. I\'m not sure how add a line to the plot without adding it my[详细]

2023-02-11 08:51 分类：问答
Matlab Principal Component Analysis (eigenvalues order)

I want to use the \"princomp\" function of Matlab but this function gives the eigenvalues in a sorted array. This way I can\'t find out to which column corresponds which eigenvalue.[详细]

2023-02-10 14:17 分类：问答
PCA + SVM using C++ Syntax in OpenCV 2.2

I\'m having problems getting PCA and Eigenfaces working using the latest C++ syntax with the Mat and PCA classes. The older C syntax took an array of IplImage* as a parameter to perform its processing[详细]

2023-02-10 05:21 分类：问答
What's wrong with my PCA?

My code: from numpy import * def pca(orig_data): data = array(orig_data) data = (data - data.mean(axis=0)) / data.std(axis=0)[详细]

2023-02-06 23:28 分类：问答
How to compute SVD using Cimg (or maybe openCV or eigen library)?

May anyone give me a quick guide on how to use Cimg to compute SVD for a 3-dimension array? I just want to get the decomposition of the array in order to compress it small for speeding up further proc[详细]

2023-02-05 09:41 分类：问答
Principal Component Analysis in MATLAB

I\'m implementing PCA using eigenvalue decomposition for sparse data. I know matlab has PCA implemented, but it helps me understand all the technicalities when I write code.[详细]

2023-01-30 07:23 分类：问答