-------- Original Message --------
Subject: RE: Margin error calculation?
Date: Mon, 28 Nov 2011 13:47:51 -0500
From: Garrido-Varas, Claudia <[email protected]>
To: '[email protected]' <[email protected]>
Hi Matias, you would have to decide if you want to measure the error
from digitizing the landmarks or from taking the pictures of the
scorpions, or both (recommended).
Take 2 pictures of each specimen, duplicate these pictures, and digitize
the four images, repeat this in all your sample. You have to include
this information in your classifiers. Then use the ANOVA in MoprhoJ and
it will give you the error for imaging and digitizing as well.
Hope it helps,
Claudia
-----Original Message-----
From: morphmet [mailto:[email protected]]
Sent: 28 November 2011 18:37
To: morphmet
Subject: Margin error calculation?
-------- Original Message --------
Subject: Margin error calculation?
Date: Sun, 27 Nov 2011 13:42:44 -0500
From: Matias Gomez Corrales <[email protected]>
To: <[email protected]>
Hi All,
W´ve been making measurements using TPSDig2, by taking pictures of
scorpions samples with millimeter paper on the background.
First using the measure option under the image tools to define a scale
factor by marking two landmarks using two reference points on millimeter
paper whose distance is 20 mm.
Then we proceed to landmark our interested points and calculate the
distance between them by using the pitagoras formula.
Now we need to calculate the margin error on our measurements but we are
confused as to how to establish it.
Basically we think we need to know what how to make a connection (in
terms of measuring error) between the millimeter paper and our
measurements made using the TPS.
Can you please provide some guidance on this matter?
Many thanks,
Matias
