En la pasada década hemos asistido a la irrupción de un nuevo concepto en el mundo empresarial: el data mining (minería de datos). Algunas empresas han implementado unidades de minería de datos estrechamente vinculadas a la dirección de la empresa y en los foros empresariales las sesiones dedicadas a la minería de datos han sido las protagonistas. La minería de datos se presenta como una disciplina nueva, ligada a la Inteligencia Artificial y diferenciada de la Estadística. Por otro lado, en el...
This study presents an evaluation of the economic capacity for the year 1988 of each of the 1919 censual sections that Barcelona is divided into. In view of the confidential nature of all information concerning incomes and resources, we have employed an indirect method of estimation using all the territorial information available at the highest level of disaggregation, that is the censual sections. This evaluation gathers variable indicators of income distribution and wealth, and without being exacly...
Principal Components Analysis deals mainly with the analysis of large data sets with multivariate structure in an observational context for exploraty purposes. The factorial planes produced will show the main oppositions between variables and individuals. However, we may be interested in going further by controlling the effect of some latent or third variable which expresses some well-defined phenomenon. We go through this by means of a graph among individuals, following the same idea of instrumental...
In this paper a new integrated approach to the analysis of square non-symmetric tables is introduced by means of cortrespondence analysis. The application of correspondence analysis to such tables is not successful due to the strong role played by the diagonal values: overloaded diagonals and structural zeros. Two main families of methods of resolution are integrated in this paper. The resulting method is applied to the study of commuting between the 41 Catalan counties.
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