From: Ronald on 29 Mar 2010 17:16 Prior to performing PCA or Factor Analysis it is a good idea to perform two tests to determine whether components or factors will result from the analysis or whether it will be a waste of time. The Kaiser-Meyer-Olkin index (KMO) of sampling adequacy and Bartlett's test for sphericity are such tests. Where is the KMO test in MATLAB?
From: dbd on 30 Mar 2010 13:25 On Mar 29, 2:16 pm, "Ronald " <rhdemail-ord...(a)yahoo.com> wrote: > Prior to performing PCA or Factor Analysis it is a good idea to perform two tests to determine whether components or factors will result from the analysis or whether it will be a waste of time. The Kaiser-Meyer-Olkin index (KMO) of sampling adequacy and Bartlett's test for sphericity are such tests. Where is the KMO test in MATLAB? Google returns references to KMO Matlab code. Of course, the first page of Google results will be pointers to your question here. Dale B. Dalrymple
From: Ronald on 30 Mar 2010 14:31 dbd <dbd(a)ieee.org> wrote in message <8b1af365-c1cd-4c03-b16d-566ed82ed6c6(a)q15g2000yqj.googlegroups.com>... > On Mar 29, 2:16 pm, "Ronald " <rhdemail-ord...(a)yahoo.com> wrote: > > Prior to performing PCA or Factor Analysis it is a good idea to perform two tests to determine whether components or factors will result from the analysis or whether it will be a waste of time. The Kaiser-Meyer-Olkin index (KMO) of sampling adequacy and Bartlett's test for sphericity are such tests. Where is the KMO test in MATLAB? > > Google returns references to KMO Matlab code. Of course, the first > page of Google results will be pointers to your question here. > > Dale B. Dalrymple I do not need help with PCA. I want what most researchers want to see before PCA is performed, that is, KMO. PCA needs to be justified with KMO. Where is KMO in MATLAB?
From: dbd on 30 Mar 2010 14:55 On Mar 30, 11:31 am, "Ronald " <rhdemail-ord...(a)yahoo.com> wrote: > dbd <d...(a)ieee.org> wrote in message <8b1af365-c1cd-4c03-b16d-566ed82ed....(a)q15g2000yqj.googlegroups.com>... .... > > > Google returns references to KMO Matlab code. Of course, the first > > page of Google results will be pointers to your question here. > > > Dale B. Dalrymple > > I do not need help with PCA. I want what most researchers want to see before PCA is performed, that is, KMO. PCA needs to be justified with KMO. Where is KMO in MATLAB? I did not search with Google for PCA. I found references to KMO implemented with Matlab. Why don't you? Dale B. Dalrymple
From: Ronald on 30 Mar 2010 16:26 dbd <dbd(a)ieee.org> wrote in message <4ac71c09-62d7-46de-9700-08b55240a7ed(a)30g2000yqi.googlegroups.com>... > On Mar 30, 11:31 am, "Ronald " <rhdemail-ord...(a)yahoo.com> wrote: > > dbd <d...(a)ieee.org> wrote in message <8b1af365-c1cd-4c03-b16d-566ed82ed...(a)q15g2000yqj.googlegroups.com>... > ... > > > > > Google returns references to KMO Matlab code. Of course, the first > > > page of Google results will be pointers to your question here. > > > > > Dale B. Dalrymple > > > > I do not need help with PCA. I want what most researchers want to see before PCA is performed, that is, KMO. PCA needs to be justified with KMO. Where is KMO in MATLAB? > > I did not search with Google for PCA. I found references to KMO > implemented with Matlab. Why don't you? > > Dale B. Dalrymple I am not looking for a reference to KMO in MATLAB. All those references use another software to produce the KMO statistic or there is custom script that is necessary. I want to know where the functionality resides. Does it exist or do I have to use custom script for a basic research function?
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