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From |
nicola.baldini2@unibo.it |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: saving output of -correlate, c- in two submatrixes for later use |

Date |
Tue, 06 Nov 2007 17:41:00 +0100 |

I have a panel of some dozens of variables: ns x* z*. I would like to: (1) save some of the output of -correlate x* z*, c- in two matrixes, X (containing only that portion of the output about the (co)variances between the x* variables and themselves) and Z (containing only that portion of the output about the covariances between the x* variables and the z* variables), e.g. x1 x2 ... xn z1 ... zn x1 XXXXXXXXXXXX ZZZZZZZZZ x2 XXXXXXXXXXXX ZZZZZZZZZ ...XXXXXXXXXXXX ZZZZZZZZZ xn XXXXXXXXXXXX ZZZZZZZZZ z1 .......useless........ ..........portion........ zn ..of...the...output... Why can't I find the output with -ereturn list-, such as after -mean()-? (2) and then to find the matrix A such that Z*A=X/sq where sq is the scalar given by the sum of the squares of the values contained in variable ns. (I know that A is -matrix A= inv(Z)*X/sq-, but has Stata 9 any simple command to calculate sq? And can I save the value of sq in some variable for later use in a for i=1...sq statement?) Thanks in advance, Nicola * * 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/

**Follow-Ups**:**st: RE: saving output of -correlate, c- in two submatrixes for later use***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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