should the initial guess be whitened too?

[ghost]

https://github.com/JuliaStats/MultivariateStats.jl/blob/master/src/ica.jl#L169

Should W = W0'winit when do_whiten == true? Otherwise the sizes do not match.

[wildart]

Did you mean this?

MultivariateStats.jl/src/ica.jl

Lines 175 to 177 in 2c61429

	if do_whiten
	W = W0 * W
	end

[ghost]

no, when the input winit is given, what is the size of it? It should be m * k, right? Then fastica! will complain that the size of W doesn't match the size of X. I just noticed that W0'winit has the right size and makes the output W similar to winit when the input is slightly perturbed.

[wildart]

It's a bug. If you know how to fix it, PR will be appreciated.