SciELO - Scientific Electronic Library Online

vol.55 issue4Meta-analysis to determine the effect of energy additives on the pH of tropical forage silages author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




  • Have no cited articlesCited by SciELO

Related links

  • Have no similar articlesSimilars in SciELO


Cuban Journal of Agricultural Science

Print version ISSN 0864-0408On-line version ISSN 2079-3480


TORRES CARDENAS, Verena et al. Application of categorical principal component analysis in the study of ovine production systems in Ciego de Ávila province. Cuban J. Agric. Sci. [online]. 2021, vol.55, n.4, pp.347-359.  Epub Dec 01, 2021. ISSN 0864-0408.

The application of categorical principal component analysis is presented, with 22 qualitative variables measured in the study of ovine production systems in Ciego de Ávila province. The mathematical description of the method is stated using the loss function that is minimized by applying alternating least squares, which contemplate the transformation of any qualitative variable into variables of quantitative nature through optimal scaling. Cronback coefficient was used to measure the reliability of the questionnaire. Crossover tables were determined to verify the association among variables using the contingency coefficient, which is based on χ2 and its significance. All the processes were carried out using the IBM-SPSS program, version 22. The application of the categorical principal components analysis allowed to identify categorical variables that explained the greatest variance in ovine production system in Ciego de Ávila province.

Keywords : Qualitative variation; production systems; multivariable analysis.

        · abstract in Spanish     · text in English | Spanish     · English ( pdf )