Dear Mr. Soda, Thank you for replying. Your statement " setting one group’s mean shape to be the starting shape and the other group’s to the target; this will lead to the most direct comparison. " pretty much describes what I have in mind to do. Which software could I use to do this? since I believe MorphoJ will not do it.
El miércoles, 31 de octubre de 2018, 13:51:07 (UTC-6), K. James Soda escribió: > > Dear Mr. Ardón, > > Good question. Whenever we make shape comparisons in GM, be that via > displacement vector or deformation grid (which is what you’re doing), we > can typically only compare two shapes at a time. One shape is called the > reference (or starting shape, in this case). This is the shape for which > the grid would look “normal”; straight, equally spaced grid lines. The > second is the target, where the grid is deformed to take this second > configuration. If you want to compare two geographic groups, I would > suggest setting one group’s mean shape to be the starting shape and the > other group’s to the target; this will lead to the most direct comparison. > I am not certain how easy this is to do in MorphoJ, though. > > Hope this helps, > > James > > On Oct 31, 2018, at 12:01 PM, Diego Ardón <diegoar...@gmail.com > <javascript:>> wrote: > > Hello, my name is Diego and I'm currently undertaking a Master's program > in Mexico. One of my thesis project involves a geometric morphometrics > study on the shape of a freshwater fish which distributes across Central > America. I'm currently having trouble with a concept that will probably be > very simple to most of you, but which I haven't found a way to get my head > around. > > I'm running a CVA on MorphoJ, dividing my dataset into two geographically > distinct groups. I run the test and change the type of graph to a "Warped > Outline Drawing". So now the graph is showing a "starting shape" which I > interpret as it being the average of all my landmark data (both > geographical groupings), however I'm not sure on how to interpret the > "target shape". I was expecting to have two "target shapes", one for each > of the geographical groupings. Could someone please help point out my > misunderstanding and offer me a way on how to interpret the "target shape"? > > Thank you, I'll be very thankful > > Diego Ardón > > -- > MORPHMET may be accessed via its webpage at http://www.morphometrics.org > --- > 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 morphmet+u...@morphometrics.org <javascript:>. > > -- MORPHMET may be accessed via its webpage at http://www.morphometrics.org --- 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 morphmet+unsubscr...@morphometrics.org.
