Browsing by Author "Graffelman, Jan"
Now showing items 1-20 of 92
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A bayesian test for Hardy-Weinberg equilibrium of bi-allelic X-chromosomal markers
Puig Oriol, Xavier; Ginebra Molins, Josep; Graffelman, Jan (2017-07)
Article
Open AccessThe X chromosome is a relatively large chromosome, harboring a lot of genetic information. Much of the statistical analysis of X-chromosomal information is complicated by the fact that males only have one copy. Recently, ... -
A Compositional Approach to Allele Sharing Analysis
Galván Femenía, Iván; Graffelman, Jan (Springer, 2016)
Part of book or chapter of book
Restricted access - publisher's policyRelatedness is of great interest in population-based genetic association studies. These studies search for genetic factors related to disease. Many statistical methods used in population-based genetic association studies ... -
A genome-wide study of Hardy–Weinberg equilibrium with next generation sequence data
Graffelman, Jan; Jain, Deepti; Weir, B.S. (2017-04-03)
Article
Open AccessStatistical tests for Hardy–Weinberg equilibrium have been an important tool for detecting genotyping errors in the past, and remain important in the quality control of next generation sequence data. In this paper, we ... -
A likelihood ratio approach for identifying three-quarter siblings in genetic databases
Galván Femenía, Iván; Barceló Vidal, Carles; Sumoy, Lauro; Moreno Aguado, Victor Raul; de Cid, Rafael; Graffelman, Jan (2021-01-15)
Article
Open AccessThe detection of family relationships in genetic databases is of interest in various scientific disciplines such as genetic epidemiology, population and conservation genetics, forensic science, and genealogical research. ... -
A log-ratio biplot approach for exploring genetic relatedness based on identity by state
Graffelman, Jan; Galván Femenía, Iván; de Cid, Rafael; Barceló Vidal, Carles (2019-04-24)
Article
Open AccessThe detection of cryptic relatedness in large population-based cohorts is of great importance in genome research. The usual approach for detecting closely related individuals is to plot allele sharing statistics, based on ... -
A network algorithm for the X chromosomal exact test for Hardy–Weinberg equilibrium with multiple alleles
Graffelman, Jan; Ortoleva, Leonardo (2021-07-01)
Article
Open AccessStatistical methodology for testing the Hardy-Weinberg equilibrium at X chromosomal variants has recently experienced considerable development. Up to a few years ago, testing X chromosomal variants for equilibrium was ... -
A system for phenotype harmonization in the National Heart, Lung, and Blood Institute Trans-Omics for Precision Medicine (TOPMed) program
Stilp, Adrienne M.; Johnson, W.L.; Greiner, Alexander; Barnett, David M.; Ganesh, Sundar; Graffelman, Jan; Wengrove, Meagan E.; Srinivasan, Rajan (2021-10-01)
Article
Open AccessGenotype-phenotype association studies often combine phenotype data from multiple studies to increase statistical power. Harmonization of the data usually requires substantial effort due to heterogeneity in phenotype ... -
An application of the isometric log-ratio transformation in relatedness research
Graffelman, Jan; Galván Femenía, Iván (Springer, 2016)
Part of book or chapter of book
Restricted access - publisher's policyAbstract Genetic marker data contains information on the degree of relatedness of a pair of individuals. Relatedness investigations are usually based on the extent to which alleles of a pair of individuals match over a set ... -
ANÀLISI MULTIVARIANT
Graffelman, Jan (Universitat Politècnica de Catalunya, 2013-01-09)
Exam
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ANÀLISI MULTIVARIANT DE DADES | FINAL
Graffelman, Jan (Universitat Politècnica de Catalunya, 2023-05-30)
Exam
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Assessment of kinship detection using RNA-seq data
Blay Magriñá, Natàlia; Casas, Eduard; Galván Femenía, Iván; Graffelman, Jan; de Cid, Rafael; Vavouri, Tanya (2019-12-02)
Article
Open AccessAnalysis of RNA sequencing (RNA-seq) data from related individuals is widely used in clinical and molecular genetics studies. Prediction of kinship from RNA-seq data would be useful for confirming the expected relationships ... -
Bayesian model selection for the study of Hardy-Weinberg proportions and homogeneity of gender allele frequencies
Puig Oriol, Xavier; Ginebra Molins, Josep; Graffelman, Jan (2019-05-29)
Article
Restricted access - publisher's policyStandard statistical tests for Hardy-Weinberg equilibrium assume the equality of allele frequencies in the sexes, whereas tests for the equality of allele frequencies in the sexes assume Hardy–Weinberg equilibrium. This ... -
Contributions to the multivariate Analysis of Marine Environmental Monitoring
Graffelman, Jan (Universitat Politècnica de Catalunya, 2000-09-12)
Doctoral thesis
Open AccessThe thesis parts from the view that statistics starts with data, and starts by introducing the data sets studied: marine benthic species counts and chemical measurements made at a set of sites in the Norwegian Ekofisk oil ... -
Correlation between tobacco control policies, consumption of rolled tobacco and e-cigarettes, and intention to quit conventional tobacco, in Europe
Lidón-Moyano, Cristina; Martín Sánchez, Juan Carlos; Saliba, Patrick; Graffelman, Jan; Martínez Sánchez, Jose Maria (2016-02-17)
Article
Open Access -
ESTADISTICA
Graffelman, Jan (Universitat Politècnica de Catalunya, 2014-06-04)
Exam
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ESTADÍSTICA
Graffelman, Jan (Universitat Politècnica de Catalunya, 2013-04-05)
Exam
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ESTADÍSTICA
Graffelman, Jan (Universitat Politècnica de Catalunya, 2012-03-20)
Exam
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ESTADÍSTICA
Graffelman, Jan (Universitat Politècnica de Catalunya, 2013-06-27)
Exam
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ESTADÍSTICA
Graffelman, Jan (Universitat Politècnica de Catalunya, 2013-07-04)
Exam
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ESTADÍSTICA
Graffelman, Jan (Universitat Politècnica de Catalunya, 2015-06-04)
Exam
Restricted access to the UPC academic community