Contents
Can a PCA be applied to binary data?
Although a PCA applied on binary data would yield results comparable to those obtained from a Multiple Correspondence Analysis (factor scores and eigenvalues are linearly related), there are more appropriate techniques to deal with mixed data types, namely Multiple Factor Analysis for mixed data available in the FactoMineR R package ( AFDM () ).
When to use linear PCA in factor analysis?
$\\begingroup$ Short answer: linear PCA (if it is taken as dimensionality reduction technique and not latent variable technique as factor analysis) can be used for scale (metrical) or binary data.
How to generalize PCA to categorical and numerical data?
On the other hand, the square correlation ratio 𝜂² (A,Y) between a categorical variable A and a numerical variable Y also takes values between 0 and 1. An intuitive way to interpret this metric is the following: the more 𝜂 ² (A,Y) is close to 1, the more the knowledge of the modality taken by A gives a powerful indication on the value taken by Y.
How does PCA work for Boolean data types?
Would PCA work for boolean (binary) data types? I want to reduce the dimensionality of higher order systems and capture most of the covariance on a preferably 2 dimensional or 1 dimensional field. I understand this can be done via principal component analysis, and I have used PCA in many scenarios.
How to perform PCA on large sparse matrix?
I am trying to apply PCA on huge sparse matrix, in the following link it says that randomizedPCA of sklearn can handle sparse matrix of scipy sparse format. Apply PCA on very large sparse matrix However, I always get error. Can someone point out what I am doing wrong. Input matrix ‘X_train’ contains numbers in float64:
How is principal component analysis ( PCA ) used for mixed data?
* Is PCA suitable for this mixed data because one of the assumptions of PCA is continues inputs. If not, what are suitable techniques to do that? Finally i need rotated component matrix based on varimax rotation and need a software or package to do the rotation on loadings for me.