References of "Orlik, Peter"
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See detailDirect clustering of a two-mode binary data-matrix
Krolak-Schwerdt, Sabine UL; Orlik, Peter

in Universität des Saarlandes: Arbeiten der Fachrichtung Psychologie (1998), 186

In this paper a discrete, categorical model is proposed for two-:­ mode data matrices with binary entries Xij E {0, 1}. The method operates directly upon a raw input (objects by attributes) data array by ... [more ▼]

In this paper a discrete, categorical model is proposed for two-:­ mode data matrices with binary entries Xij E {0, 1}. The method operates directly upon a raw input (objects by attributes) data array by determining two-mode submatrices whose entries entirely have values x;j = 1. In addition, different submatrices are required to have a minimum set of objectattribute- pairs in common. Objects and attributes are classified simultaneously in a number ofjoint clusters. The method may be characterized as a non-hierarchical clustering procedure and in its model function to predict the data it is similar to Boolean factor analy􀢛is. Basically, the proposed method dubbed ' GRIDPAT' (for 'PATtern analysis of GRIDs') was developped for the structural representation of self concept data. Its relations to basic notions of Formal Concept Analysis and blockmodeling are discussed. An illustrative application of the approach is provided. [less ▲]

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See detailRelating factor matrices of different dimensionality: A note on optimizing orthogonal procrustes solutions
Krolak-Schwerdt, Sabine UL; Orlik, Peter

in Universität des Saarlandes: Arbeiten der Fachrichtung Psychologie (1998), 187

l'vlatching by the Procrustes method involves the transformation of a matrix A to maximal agreement with a specified target matrix B. The present paper is concerned with the soluti on of the 'Orthogonal ... [more ▼]

l'vlatching by the Procrustes method involves the transformation of a matrix A to maximal agreement with a specified target matrix B. The present paper is concerned with the soluti on of the 'Orthogonal Procrustes problem' when the column orders of A and B are different. Avai lable techniques ei ther yield nonunique solutious or the column order of one matrix has to be adjusted by truncating or adding some columns. A new method i s advanced which provides a unique sol,ut.ion without constraining the number of columns of corresponding matrices. An illustrative example is given. [less ▲]

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See detailEin Verfahren zur Klassifikation zweimodaler binärer Daten
Krolak-Schwerdt, Sabine UL; Orlik, Peter

Scientific Conference (1996, March)

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See detailTRIPAT: a model for analyzing three-mode binary data
Krolak-Schwerdt, Sabine UL; Orlik, Peter; Ganter, Bernhard

in H. H. Bock; Lenski, W.; M. M. Richter (Eds.) Studies in classification, data analysis, and knowledge organization Information systems and data analysis. Prospects - foundations - applications (1994)

A discrete, categorical model is presented for three-mode (conditions by objects by attributes) data arrays with binary entries xijk 2 f0; 1g. Basically, the model attempts a simultaneous classification ... [more ▼]

A discrete, categorical model is presented for three-mode (conditions by objects by attributes) data arrays with binary entries xijk 2 f0; 1g. Basically, the model attempts a simultaneous classification of the entities or elements of the three modes in a number of common clusters. Clusters are denied by three-mode submatrices of maximum size with entries xijk = 1. In performing a discrete representation of the data structure, the model may be classified as a non-hierarchical clustering procedure. It involves a reorganization of the data array such that the clustering solution is interpreted directly on the data, and it allows for overlapping as well as nonoverlapping clusters. The method is similar to three-mode component models such as CANDECOMP and SUMMAX in the model function to predict the data. An application concerning recall data in a study of social perception is provided. [less ▲]

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See detailTRIPAT - ein Verfahren zur Analyse dreimodaler binärer Daten
Krolak-Schwerdt, Sabine UL; Orlik, Peter; Ganter, Bernhard

Scientific Conference (1993, March)

Detailed reference viewed: 19 (1 UL)
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See detailA regression analytic modification of Ward's method: A contribution to the relation between cluster analysis and factor analysis
Krolak-Schwerdt, Sabine UL; Orlik, Peter; Kohler, André

in Bock, H. H.; Ihm, P. (Eds.) Studies in classification, data analysis, and knowledge organization (1991)

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See detailEine regressionsanalytische Alternative zum Wardschen Modell
Krolak-Schwerdt, Sabine UL; Orlik, Peter

Scientific Conference (1990, March)

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See detailEin semantischer Atlas zur Kodierung alltagssprachlicher Verhaltensbeschreibungen nach dem Symlog-Raummodell
Orlik, Peter; Beck, Dieter; Becker, Ulrike et al

in International Journal of Small Group Research (1987), 3

Detailed reference viewed: 174 (0 UL)