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Old Friday 17th February 2017, 13:28   #1
tjbirder999
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help needed with discriminant function analysis

I am currently analyzing my data from mist-netting of weavers in Sudan. I am trying look for a way to separate female Cinnamon and Northern Masked Weavers, and also to separate females and males in non-breeding plumage. From what I can gather, discriminant function analysis is one way of doing this. I have found some information online, but I am a bit out of my depth and could use some help.
The main thing is that I do not have decent statistical software on my Mac to play around with and try to figure it out. From what I can gather, Excel cannot do it. At university I used Minitab, but this is really expensive to buy. In the past, I have used the one-month Mintab download to do analyses, but I would like something more permanent. Can anyone recommend a cheaper alternative I could use that is not too complicated, and would allow me to carry out my analyses? I can afford to pay a couple of hundred dollars, or thereabouts, if it will be a useful package. Or does anyone know of any alternative ways to do it?
Any help appreciated.
Thanks

Tom
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Old Friday 17th February 2017, 14:50   #2
Mono
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Here is a "how to" for Excel with example

http://people.revoledu.com/kardi/tutorial/LDA/
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Old Saturday 18th February 2017, 07:49   #3
tjbirder999
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Quote:
Originally Posted by Mono View Post
Here is a "how to" for Excel with example

http://people.revoledu.com/kardi/tutorial/LDA/
Thanks Mono. It looks quite complex, but it gives me something to start working on. Its good to know that it can be done using Excel.

Tom
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Old Saturday 18th February 2017, 08:19   #4
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Perhaps you could use Weka for this, it's free and includes several different tools for classification, for example logistic regression that might be an alternative to DFA.

http://www.cs.waikato.ac.nz/ml/weka/

There is also a separate package for DFA in Weka, but you need to install it first (I haven't used it myself).

http://weka.sourceforge.net/packageM...sis/index.html
http://stackoverflow.com/questions/2...ckage-for-weka

Using R would be another alternative, widely used for statistical applications etc (also freeware).

http://www.statmethods.net/advstats/discriminant.html
https://www.youtube.com/watch?v=s8pvp2Ctxfc
you can find more on R and DFA on google etc.

Last edited by Vespobuteo : Saturday 18th February 2017 at 08:36.
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Old Saturday 18th February 2017, 15:45   #5
tjbirder999
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Thanks Vespobuteo. These look interesting. I will try them out.

Tom
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Old Saturday 18th February 2017, 16:08   #6
msb123
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R is free but has a steep initial learning curve. On the other hand, it is becoming more and more popular in academic science and time spent learning to use it is unlikely to be wasted if you will have other data to analyse in the future.
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Old Monday 20th February 2017, 14:42   #7
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really not sure if this is any help but the Grapher app comes installed on your Mac,

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