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A good place for you to start is the MorphoJ manual. Specifically the Preli= minaries section http://www.flywings.org.uk/MorphoJ_guide/frameset.htm?index.htm As for how the selection of landmarks will affect the results, short answer= is it depends. We use landmarks to model a complex shape in a simple and r= eproducible way. If your end goal is somehow dependent on having an accurat= e estimate of variation (e.g Procrustes anova), and those landmarks have a = high level uncertainty, you might be better of excluding them. If your goal= is estimating a mean shape and/or comparing mean shapes, then it may not m= atter as much... You also need to factor in your sample size and the dimens= ionality of your data. These are all well chewed topics in GMM (with variab= le conclusions), you may want to read some background. M -----Original Message----- From: Sara Schoen <sschoe...@gmail.com>=20 Sent: Monday, March 25, 2019 5:41 AM To: MORPHMET <morphmet@morphometrics.org> Subject: [MORPHMET] Question about MorphoJ/Landmarking Hello! I'm working on the beginnings of a masters thesis and part of it is taking = over a project from a previous student. I am learning MorphoJ to help finis= h that project, but the original student used 14 landmarks (LMs) and we've = realized some of those are not helpful in our anaylsis. They act as noise a= nd I've been asked to exclude those points.=20 Is there a way for me to exclude those LMs (as in only consider 1-9 and ign= ore 10-14) in MorphoJ or would it be better to just start over?=20 If I start over, is there a certain number of LMs I *need* to have? Is ther= e a minimum? How will this change the results if I don't have a lot? The "N= ew" method would include 9 LMs.=20 Thank you to any help/advice you can give me! --=20 MORPHMET may be accessed via its webpage at http://www.morphometrics.org ---=20 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 e= mail to morphmet+unsubscr...@morphometrics.org. --=20 MORPHMET may be accessed via its webpage at http://www.morphometrics.org ---=20 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 e= mail to morphmet+unsubscr...@morphometrics.org.
