how to do PCA for sequance alignment using 2018 version?

Question

Mohamed Khatab 2018-12-6

回答： Harsh Sharma 2024-10-26，18:06

hi,

i tried to use the following fuction but it doesnot work!!.

and geting this error

Error using pca (line 168)

The value of X must be a numeric array.

[pc, zbscores, pcvars]= pca(ma);
variance_model=pcvars./sum(pcvars) * 100
 
cumsum_variance_model=cumsum(pcvars./sum(pcvars) * 100)

Answer 1

Harsh Sharma 2024-10-26，18:06

Hi Khatab,

The error you are facing is because of the invalid datatype of “ma” variable in your code. The “pca” function takes input as a matrix of single or double datatype. For more information on the input type, you can check the following documentation - https://www.mathworks.com/help/stats/pca.html#:~:text=the%20trained%20model.-,Input%20Arguments,-collapse%20all