Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

From |
Dave Garson <garson@ncsu.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Logistic growth curve question |

Date |
Sun, 13 Apr 2014 17:07:10 -0400 |

1. y1 through y4 are distance measurements at ages 8, 10, 12, and 14

4. Error variances are constrained equal. 5. Dependent means are constrained to 0.

SAS SYNTAX: PROC CALIS DATA=in.royfm MODIFICATION EFFPART PLATCOV;

/* Above, EFFPART requests a partition of total effects */

PATH /* Below, there are four time periods, y1 - y4 */ y1 y2 y3 y4 <--- ICEPT = 1.0 1.0 1.0 1.0, y1 y2 y3 y4 <--- SLOPE = 8.0 10.0 12.0 14.0;

PVAR y1 = variance1, y2 = variance1, y3 = variance1, y4 = variance1, ICEPT = ivariance, SLOPE = svariance;

PCOV ICEPT SLOPE = cov1; /* Above, ICEPT and SLOPE covariance is freely estimated as cov1 */ MEAN y1 = 0, y2 = 0, y3 = 0, y4 = 0, ICEPT = imean, SLOPE = smean; /* Above, time variables constrained to a mean of 0 */

RUN; STATA SYNTAX sem (ICEPT -> y1@1 y2@1 y3@1 y4@1) (SLOPE -> y1@8 y2@10 y3@12 y4@14), latent(ICEPT SLOPE)

means(ICEPT SLOPE) noconstant Advice appreciated on list or to david_garson@ncsu.edu Best to all, Dave * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Logistic growth curve question***From:*Richard Williams <richardwilliams.ndu@gmail.com>

- Prev by Date:
**st: New version of -parmest- on SSC** - Next by Date:
**st: re: standardized betas with nlcom** - Previous by thread:
**st: New version of -parmest- on SSC** - Next by thread:
**Re: st: Logistic growth curve question** - Index(es):