Thank you for all your answers ! (sorry for the delay) For the time being I analyzed the right and left separatly and as suggested will evaluate the assymetry to then perform the fonction "flipped" of the LOST package.
I enconter some difficulties with the function flipped thought, because I am not certain of how to create the "land.pairs matrix ". I have twelve landmarks and the other twelve "NA" in an Ix3 matrix and thus I tried : land.pairs <- matrix(1:24, ncol = 2) #run the "fllipped function" code and after use : flipped(temps, land.pairs, show.plot = FALSE, axis = 1) Error in reversed[land.pairs[i, 2], ] : indice out of bound When using solve (x) it says that it needs to be a square matrix. Le mardi 30 juin 2020 à 12:34:23 UTC-4, [email protected] a écrit : > Dear Diane, > > we published the last year this tool to articulate disarticulate 3D > models, it's part of the Arothron R package > https://anatomypubs.onlinelibrary.wiley.com/doi/abs/10.1002/ar.24077?af=R > > Anyway, I think if you use an external 3D model to estimate the sagittal > plane you can introduce a bias into your data. > > In your case, my suggestion is just to study the shape of the left and > right temporal bones separately. > > If you want to evaluate the asymmetry you can: > - mirror the left (or right) side (mirror function Morpho R package) > - gpa step (opa, including or without scaling, rotonto function Morpho R > package) between "mirrored left side" and "right side" > - calculation of the distance (e.g., euclidean distance) between the two > aligned landmark/semilandmarks configurations. > > To visualize the displacement between two aligned meshes (rotmesh.onto > function) I suggest to use the function meshDist. > > This paper by Chris Klingenberg may be useful to you > https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1558-5646.1998.tb02018.x > > > Best, > > Antonio > > > On Tue, 30 Jun 2020 at 15:04, Adams, Dean [EEOB] <[email protected]> > wrote: > >> Diane, >> >> As I answered on the geomorph.google group, the package geomorph does not >> have a 'bilateral missing' function. The 'estimate.missing' function allows >> either TPS-based or regression-based landmark estimation. >> >> For bilateral options, one could see functions in the package LOST or >> Morpho packages. >> >> Dean >> >> Dr. Dean C. Adams >> Director of Graduate Education, EEB Program >> Professor >> Department of Ecology, Evolution, and Organismal Biology >> Iowa State University >> https://www.eeob.iastate.edu/faculty/adams/ >> phone: 515-294-3834 <(515)%20294-3834> >> >> -----Original Message----- >> From: [email protected] <[email protected]> On Behalf Of >> Diane Moya >> Sent: Tuesday, June 30, 2020 7:30 AM >> To: Morphmet <[email protected]> >> Subject: [MORPHMET2] Higlhy fragmented collection - missing bilateral >> symetry >> >> Hi everybody, >> I am studying temporal morphological variation using 3Dgm in osteological >> collections dating from the colonial period. Most of the collections from >> this period are incomplete due to important fragmentagtion -only the >> temporal region is rather well preserved. Moreover, temporals are isolated >> from their cranium, both temporals are seldom present and to my knowledge >> without midline landmarks it is impossible to estimate the symetry. I was >> thinking about using a complete skull (same sex and geographic origin) and >> « merging » the temporal I have with it to estimate the other side or >> specific landmarks using missing bilateral function from the Rgeomorph >> package. Are there any other options, or a function that can estimate >> missing bilateral landmark (knowing that the temporals are not completly >> symetrical)? >> Thanks in advance >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Morphmet" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/morphmet2/c59488a4-8cc1-48da-9b03-610fc489c212o%40googlegroups.com >> . >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Morphmet" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/morphmet2/CH2PR04MB66177D7388F4F8C0A57ACD41A26F0%40CH2PR04MB6617.namprd04.prod.outlook.com >> . >> > > > -- > Antonio Profico > PhD > Palaeohub – Department of Archaeology > University of York > > morphomap mailing list: https://groups.google.com/forum/#!forum/morphomap > Subscription: https://groups.google.com/forum/#!forum/morphomap/join > > Arothron mailing list: https://groups.google.com/forum/#!forum/arothron > Subscription: https://groups.google.com/forum/#!forum/arothron/join > > MicroWeaR mailing list: https://groups.google.com/forum/#!forum/microwear > Subscription: https://groups.google.com/forum/#!forum/microwear/join > > -- You received this message because you are subscribed to the Google Groups "Morphmet" group. 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