81 citations · 88 across the 4 of their papers we have counts for
4 papers
Attribute Dependencies for Data with Grades
Radim Belohlavek, Vilem Vychodil
This paper examines attribute dependencies in data that involve grades, such as a grade to which an object is red or a grade to which two objects are similar. We thus extend the cl…
From-Below Approximations in Boolean Matrix Factorization: Geometry and New Algorithm
Radim Belohlavek, Martin Trnecka
We present new results on Boolean matrix factorization and a new algorithm based on these results. The results emphasize the significance of factorizations that provide from-below…
Discovery of factors in matrices with grades
Radim Belohlavek, Vilem Vychodil
We present an approach to decomposition and factor analysis of matrices with ordinal data. The matrix entries are grades to which objects represented by rows satisfy attributes rep…
Sensitivity Analysis for Declarative Relational Query Languages with Ordinal Ranks
Radim Belohlavek, Lucie Urbanova, Vilem Vychodil
We present sensitivity analysis for results of query executions in a relational model of data extended by ordinal ranks. The underlying model of data results from the ordinary Codd…