swt decomposition without all the coarse levels

[zaccharieramzi]

In the current implementation of the swt, the function returns all the coarse levels (called here approximation). But I think we only need the last one theoretically.

Indeed, when looking at the code, you can see that the approximation coefficients are discarded and when only keep the detail coefficients for reconstruction. The last coarse level is safely saved here. I think it would be nice if there was an option to decompose/reconstruct without all these additional coefficients.

[grlee77]

Agreed. This feature was recently proposed in #476 if you have any feedback to add there in terms of how you would like it to look.

[zaccharieramzi]

No, I think from what I saw it was what I had in mind. Cool that you were working on this!