4,996 research outputs found
Datasets and R-scripts used for the revision of the Dibrachys cavus complex by Peters & Baur, 2011, Zootaxa 2937.1
No full textIn 2011 we published a revision on the Dibrachys cavus complex in Zootaxa (Peters and Baur, 2011, here a link to our open access paper). It was our wish to also publish two versions of the dataset (one with missing values, one with missing values imputed) as supplementary files. Unfortunately, the data files seem to be no longer available on the publishers webpage. Hence, we publish the data files herewith again in CSV format.
We take the opportunity to also publish the R-scripts that we used for calculating multivariate analyses, tests, and the multiple imputation of missing values.
All files are available individually and with an own link. For convenience, we have compiled all files also in a ZIP file.
Baur (2020) used the dataset for further exploration in a Multivariate Ratio Analysis (MRA).
Papers quoted above you may find in the section References of the Zenodo package.
Citation of this package
Peters, Ralph S., & Baur, Hannes (2020, November 9) Datasets and R-scripts used for the revision of the Dibrachys cavus complex by Peters & Baur, 2011, Zootaxa 2937.1. Zenodo. https://doi.org/10.5281/zenodo.4264539 (directs to the newest version of the package)
Iuris Quaedam Delibata / Quae, Praeside Dn. Georgio Reichardo Hammer/ Icto Et Antecessore In Hac Universitate Primario, V. Non. Maii, A. MDCLXXVI. P. P. Johannes Ulricus Baur/ Tub. A. & R.
No full textIURIS QUAEDAM DELIBATA / QUAE, PRAESIDE DN. GEORGIO REICHARDO HAMMER/ ICTO ET ANTECESSORE IN HAC UNIVERSITATE PRIMARIO, V. NON. MAII, A. MDCLXXVI. P. P. JOHANNES ULRICUS BAUR/ TUB. A. & R.
Iuris Quaedam Delibata / Quae, Praeside Dn. Georgio Reichardo Hammer/ Icto Et Antecessore In Hac Universitate Primario, V. Non. Maii, A. MDCLXXVI. P. P. Johannes Ulricus Baur/ Tub. A. & R. (1)
Titelseite (1)
Widmung (2)
Thesis I. - XXXIV. (4)
Corollariorum locorum subjecta (26
La Maison des Postes & l'Hôtel Baur à Zurich
No full textDas 1838 erbaute Hôtel Baur, davor Passanten und Kutschen; rechts davon die Poststrasse mit dem Postgebäude. Ganz rechts im Bild die Tiefenhoflinde als Teil des Bürklischen Gartens, der zum Anwesen des Seidenfabrikanten Johann Georg Bürkli gehörtechez R. Dikenmann, Peintr
Hôtel Baur in der Stadt : Hôtel Baur en ville
No full textAnonyme/r Künstler/in; Lithografie mit Gelatineüberzug und einer Rahmung, die einer Kabinettkarte nachempfunden wurdeUnterlage verso nummeriert: "605870/2"Das Hotel Baur am Paradeplatz wurde 1838 erbaut, sechs Jahre später das "Baur au Lac
[Hotel Baur]
No full textDas 1838 erbaute Hôtel Baur mit der Hauptfassade zum Paradeplatz und der Fassade zur Poststrasse. Ganz rechts im Bild eine Säule, die zum Postgebäude gehörte (vgl. die Signatur: Graphische Sammlung und Fotoarchiv J 2 Zürich Peter-Qu. Hôtel Baur I,19)Anonyme/r Fotograf/i
Hôtel Baur
No full textDas 1838 erbaute Hôtel Baur, davor Passanten und Kutschen; links das Zeughaus und die Turmspitze von St. Peter (vgl. die Farbvariante mit der Signatur Graphische Sammlung und Fotoarchiv, J 2 Zürich Peter-Qu. Hôtel Baur I,16 mit der Systemnummer 011080593)Zurich chez TrachslerAnonyme/r Künstler/i
Hôtel Baur
No full textDas 1838 erbaute Hôtel Baur, davor Passanten und Kutschen; links das Zeughaus und die Turmspitze von St. PeterAnonyme/r Künstler/i
Multivariate Ratio Analysis (MRA): R-scripts and tutorials for calculating Shape PCA, Ratio Spectra and LDA Ratio Extractor
No full textThis package contains some scripts written in the R language (R Core Team 2020) that allow the calculation of various morphometric methods published by Baur & Leuenberger (2011). Later these methods were addressed under the name "Multivariate Ratio Analysis (MRA)" (see Baur et al. 2014). The scripts were originally provided by the authors in an electronic supplementary file together with the original paper, and later in slightly modified form also by Baur et al. (2014). However, it is our wish to publish them in a manner that they may be cited separately and also be updated when necessary.
The package contains the main scripts in two files:
Shape_PCA_vX.XX.R
LDA_Ratio_Extractor_vY.YY.R
Important note: In the script of the LDA Ratio Extractor the case for more than 2 groups is now also included. This case was described by Baur & Leuenberger (2011, p. 817), but was left out from the R-script originally published in Systematic Biology. We think that the implementation is a welcome addition to the entire set of methods provided by MRA.
For both scripts, separate tutorials are available:
Tutorial_1_ Shape_PCA.R
Tutorial_2_LDA_Ratio_Extractor.R
It is recommended to work through these brief tutorials, starting with the first one.
A dataset (from Baur et al. 2014) is supplied as well:
Anisopteromalus_data.csv
In order to avoid any troubles, make sure that all files are put into one and the same folder. R-Studio is recommended for performing the R-scripts (especially for beginners).
PDFs of the two papers cited below are also provided in the package.
Citation: You may use the citation of the package as indicated by Zenodo on this webpage. Do also cite the original paper by Baur & Leuenberger (2011, citation below), as only this article contains the mathematical background and scientific context concerning the methods.
If you have questions please contact:
Hannes Baur, Natural History Museum Bern, Bernastrasse 15, 3005 Bern, Switzerland, Email: [email protected]
Website: https://www.nmbe.ch/en/hannes.baur
Cited references
Baur H, Kranz-Baltensperger Y, Cruaud A, Rasplus J-Y, Timokhov AV, Gokhman VE (2014) Morphometric analysis and taxonomic revision of Anisopteromalus Ruschka (Hymenoptera: Chalcidoidea: Pteromalidae) - an integrative approach. Systematic Entomology 39: 691–709. https://doi.org/10.1111/syen.12081
Baur H, Leuenberger C (2011) Analysis of ratios in multivariate morphometry. Systematic Biology 60: 813–825. https://doi.org/10.1093/sysbio/syr061
R Core Team (2020). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. URL https://www.R-project.org/.
Further reading (recommended examples of the use of MRA in taxonomy and functional morphology)
Huber C, Schnitter PH (2020) Nebria (Pseudonebriola) tsambagarav sp. nov., a new alpine species from the Mongolian Altai (Coleoptera, Carabidae). Alpine Entomology 4: 29–38. https://doi.org/10.3897/alpento.4.50408
Petrović TG, Vukov TD, Tomašević Kolarov N (2017) Morphometric ratio analyses: Locomotor mode in anurans. Comptes Rendus Biologies 340: 250–257. https://doi.org/10.1016/j.crvi.2017.02.004What is new in v1.02
- addition of main reference (Baur & Leuenberger 2011) in tutorials and function files
- minor change in presentation of information concerning LDA_Ratio_Extractor_vY.YY.R
- correction of spelling error
Hotel Baur
No full textDas 1838 erbaute Hôtel Baur, davor Passanten und eine Kutsche. Rechts im Bild die Poststrasse mit Blick zum Fraumünster, gesäumt vom Postgebäude. Die Tiefenhoflinde stand im Garten des Seidenfabrikanten Johann Georg BürkliAnonyme/r Künstler/i
Two contributions to the representation theory of algebraic groups
No full textLet V be a �nite dimensional complex vector space. A subset X
in V has the separation property if the following holds: For any pair
l, m of linearly independent linear functions on V there is a point x
in X such that l(x) = 0 and m(x) 6= 0. We study the the case where
V = C[x; y]n is an irreducible representation of SL2. The subsets we
are interested in are the closures of SL2{orbits Of of forms in C[x; y]n.
We give an explicit description of those orbits that have the separation
property:
The closure of Of has the separation property if and only if the
form f contains a linear factor of multiplicity one.
In the second part of this thesis we study tensor products V�
V� of irreducible G{representations (where G is a reductive complex
algebraic group). In general, such a tensor product is not irreducible
anymore. It is a fundamental question how the irreducible components
are embedded in the tensor product. A special component of the
tensor product is the so-called Cartan component V�+� which is the
component with the maximal highest weight. It appears exactly once
in the decomposition.
Another interesting subset of V�
V� is the set of decomposable
tensors. The following question arises in this context:
Is the set of decomposable tensors in the Cartan component of
such a tensor product given as the closure of the G{orbit of a highest
weight vector?
If this is the case we say that the Cartan component is small. We
show that in general, Cartan components are small. We present what
happens for G = SL2 and G = SL3 and discuss the representations of
the special linear group in detail
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