How do I apply PCA (Principal Component Analysis) on single Channel ECG data?

I have one channel ECG signals in a variable let, X(double) and I want apply PCA (Principal Components Analysis) on all of them to find the component which has the least noise.Currently It is sampled data. Can PCA be done on this signal. I have tried using pca function.But unfortunately getting this double empty matrix.

Answer 1

[KSSV]

REshape your signal into matrix of specific duration and use pca