Hi mfv, I'm not sure this will help you but I just put up a egg I made for myself that might be useful to you in this context.
https://gist.github.com/kristianlm/9d7e5c1bdae8c443c7deb676d6f4a7d0 Maybe the vector-grid procedure <https://gist.github.com/kristianlm/9d7e5c1bdae8c443c7deb676d6f4a7d0#file-grid-scm-L40> might be of use. K. On Fri, Sep 9, 2016 at 3:21 AM, Justin Ethier <justin.eth...@gmail.com> wrote: > A vector of vectors would be more efficient to traverse for large values > of [n], but if the vectors are not the same length you need to check to > make sure index [n] exists in each one. If you are going to handle random > insertions of data you also have to worry about growing a vector(s) if the > requested [n] is larger than the vector size. > > A simple and elegant (though perhaps not the most efficient?) solution is > to use a hashtable to store the cell values: > https://wiki.call-cc.org/man/4/Unit%20srfi-69 > > This example is in Python but you get the idea: > http://code.activestate.com/recipes/355045-spreadsheet/ > > Thanks, > > Justin > > > On Thu, Sep 8, 2016 at 7:07 AM, mfv <m...@freeshell.de> wrote: > >> Hi, >> >> what would be the best way to implement two dimensional linked lists into >> Scheme? I was thinking about fooling around with spreadsheet calculations >> in >> Scheme, but it seems to me tha there are not proper data structures for it >> here. >> >> As I understand, making linked lists from linked lists will create a >> structure that can not be traverse efficiently in all directions: >> >> With the structure being >> >> (list (list-A) (list-B) (...) (list-Z) (list-AA)) >> >> it would be trivial to quick to traverse from A[0] to A[n], but long to >> get to A[n] to B[n]. >> >> Would the same thing apply to vectors? >> >> Regards, >> >> mfv >> >> >> >> _______________________________________________ >> Chicken-users mailing list >> Chicken-users@nongnu.org >> https://lists.nongnu.org/mailman/listinfo/chicken-users >> > > > _______________________________________________ > Chicken-users mailing list > Chicken-users@nongnu.org > https://lists.nongnu.org/mailman/listinfo/chicken-users > >
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