[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

From |
Asgar Khademvatani <akhademv@ucalgary.ca> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: A Question on Looping |

Date |
Tue, 18 Sep 2007 07:13:03 -0600 |

Dear Statalist

Actually, I have already generated four variable A, B, C, and D that each contains 43 observation, in Stata 8.2. I want to make 43 square matrix (2 by 2) using each of 43 observation based on each observation of these variables. Then, I want to calculate the real Eigenvalues of each matrix and list the 43 matrix and their Eigenvalues. I need to write a loop to do this job. Actually, I have already written the following loop using "foreach command" but I am getting the following error as follows;

foreach i = 1/43 {

2. matrix K[`i'] = (A[`i'], B[`i'] \ C[`i'],D[`i'])

3. matrix symeigen X[`i'] V[`i'] = K[`i']

4. matrix list K[`i'] V[`i']

5. }

invalid syntax

r(198);

end of do-file

r(198);

Also, alternativley, I have written another alternative do file by "while" loop but it is also subject to error as follows;

1.local i 1

2. while `i' < 43 {

3. matrix K[`i'] = (lpl_m[`i'], lpm_m[`i'] \ le_m[`i'],lk_m[`i'])

4. matrix symeigen X[`i'] V[`i'] = K[`i']

5. matrix list V[`i']

6. local i = `i' + 1

7. }

too many ')' or ']'

r(132);

end of do-file

r(132);

Could you help me out on this matter and say what is wrong with any of these alternative loops?

Thanks

Asgar Khademvatani

*

* For searches and help try:

* http://www.stata.com/support/faqs/res/findit.html

* http://www.stata.com/support/statalist/faq

* http://www.ats.ucla.edu/stat/stata/

- Prev by Date:
**st: lag operator and "not sorted" problem** - Next by Date:
**st: RE: re: a drawing in Stata Journal** - Previous by thread:
**RE: st: can't reproduce bootstrap confidence intervals** - Next by thread:
**Re: st: A Question on Looping** - Index(es):

© Copyright 1996–2014 StataCorp LP | Terms of use | Privacy | Contact us | What's new | Site index |