Re: Correlation matrix is not positive definite

Posted by viswa21 on Nov 30, 2011; 3:16am
URL: http://spssx-discussion.165.s1.nabble.com/Correlation-matrix-is-not-positive-definite-tp4999980p5034443.html

Hi Art,
               
Question 1:
Is this correct? You have 3 Independent variables:
A type of bacterium between cases 4 levels a nominal level variable
B growth time repeated within cases 7 levels a ??? level variable
C wavelength repeated within cases a ratio level variable at 171 equal intervals

and one dependent variable intensity a ratio level variable.
That is 4788 cells with 1 measurement of intensity in each.

Answer 1: yes, it is correct.


Question 2: Is factor B repeats of a single parameter? i.e., are the levels ordered? At equal intervals?  7 distinct settings of different parameters, i.e., a nominal level variable?

Answer 2: Growth time is varied in minutes, but not of equal intervals. Answer seems like nominal level variable.

Our research field do not use Q factor analysis.Leblanc_Monitoring_the_identity_of_bacteria_using_their_intrinsic_fluorescence.pdf

Please take a look at the PDF file attached.

Thanks for your help.