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Formal Concept Analysis aims at finding clusters (concepts) with given properties in data. Most techniques of concept analysis require a dense matrix with no missing values on the input. However, real data are often incomplete or inaccurate due to the noise or other unforeseen reasons. This paper focuses on using matrix factorization methods to complete the(More)
A technique to detect patterns in student’s program source codes. First, we represent a source code in the form of an Abstract Syntax Tree (AST). The detection of patterns is done with the SLEUTH algorithm for frequent subgraph mining on trees. We provide experiments using real data from a programming course at our university. In the paper, we discuss the(More)
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