Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Scatterplot"”.
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Random sampling as a clutter reduction technique to facilitate interactive visualisation of large datasets
… to decide what data is important. Sampling-based scatterplot and parallel coordinate visualisations are developed to experiment with various options and tools. These include simple, dynamic sampling controls with density feedback; a method of checking the reality of the representative sample; the …
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Andromeda in Education: Studies on Student Collaboration and Insight Generation with Interactive Dimensionality Reduction
… tool that projects high-dimensional data into a scatterplot-like visualization using Weighted Multidimensional Scaling (WMDS). The visualization can be explored through surface-level interaction (viewing data values), parametric interaction (altering underlying parameterizations), and …
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Biplots based on principal surfaces
… are considered as extensions of the ordinary scatterplot by providing for more than three variables. When the difference between data points are measured using a Euclidean embeddable dissimilarity function, observations and the associated variables can be displayed on a nonlinear biplot. A …
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Measuring comprehension of abstract data visualisations
… namely an interactive three-dimensional scatterplot, in a series of four experiments. The outcomes of the empirical study are three-fold. On a concrete applicable level, three-dimensional scatterplots are found to be efficient in trend detection but not in outlier detection. On a …
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VISUAL ANALYTICS FOR OPEN-ENDED TASKS IN TEXT MINING
… of each space using the other. However, the scatterplot-based approach in ParallelSpaces does not generalize to categorical variables due to overplotting. My research proposes an improved layout algorithm for those cases in our follow-up work, Gatherplots, which eliminate overplotting in …
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Bias Assessment and Reduction in Kernel Smoothing
… bias when applying kernel smooths to a given scatterplot of data. In this dissertation, we propose pointwise confidence intervals for bias and demonstrate a software tool to implement the confidence bands in practice. The effectiveness of the proposed bias assessment tool is demonstrated using …
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Geo-Coordinated Parallel Coordinates (GCPC): A Case Study of Environmental Data Analysis
… plots, geovisualization, investigative scatterplot, and multiple coordinated views. The result of this work was the development of Geo-Coordinated Parallel Coordinates (GCPC), a geovisual analytics approach designed to support the exploration of complex environmental data. Multiple …
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Exploring Long-Term Flood Variability in the Lower French Broad River Using Fluvial Paleoflood Hydrology
… using End-Member Analysis and Locally Estimate Scatterplot Smoothing (LOESS) regression analysis. LOESS positive residuals plotted above the regression trendline were interpreted as sand peaks corresponding to large and extreme flood event deposition and were plotted against the age/depth model …
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Time series analysis and machine learning studies of biophotovoltaic systems
… and trend decomposition using locally estimated scatterplot smoothing (STL) was first used to decompose BPV current density profiles into trend, seasonal and remainder (irregular) components. LSTM networks were then trained to predict the observed and seasonal current densities using current …
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What is an adequate living wage level for South Africa?
… a local polynomial regression (locally estimated scatterplot smoothing or LOESS). The results showed that both methods led to similar results. A monthly living wage of at least R10,000 – R11,000 would allow South Africans to achieve a good QoL. In the provincial analyses, Western Cape, Eastern …
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Ecology of Mid-Atlantic bats after white-nose syndrome: communities, reproduction, and diet within an urban-to-rural gradient
… and West Virginia. Based on locally estimated scatterplot smoothing line calculations, I determined that the highest levels of maternity season acoustic activity for Eptesicus fuscus and Lasiurus borealis corresponded primarily to lactation periods. To determine sampling effort, I developed …
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Exploring the Impacts of Aspect Ratios on Visual Perception in Scatterplots
… effect of aspect ratio on visual perception in scatterplots. Four tasks explored how the aspect ratio affects participants' perception of distance, amount, and correlation in scatterplots. The results showed that square aspect ratio scatterplots are more suitable for detecting length and number, …
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Empirical Essays on the Economics of Food Price Shocks: Micro-econometric Evidence from Uganda
… GMM fixed effects models to locally weighted scatterplot smoother (LOWESS), local polynomial regressions, and Ruppert et al’s (2003) semi-parametric penalized splines to address nonlinearities in welfare dynamics, identify and locate critical welfare thresholds, and test for the presence of …
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Analyzing the temperature dimension of University of Illinois electricity demand
Made available in DSpace on 2016-05-04T21:49:06Z (GMT). No. of bitstreams: 2 GUERRERO-THESIS-2015.pdf: 2270398 bytes, checksum: 440c53b436df1200cd5e84da507ec2d7 (MD5) LICENSE.txt: 4213 bytes, checksum: fa95ff9e926f13b985b5f5e38e2af56e (MD5) Previous issue date: 2015-07-22
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Criterios histológicos para el diagnóstico del cáncer de riñón
… Cuando se realiza la distribución de puntos (“Scatterplot”) tomando como coordenadas el área nuclear media y el factor de elongación, contratados por un lado con los estadios de la enfermedad (Gráfica 10), y a continuación con los grados nucleares (Gráfica 11.), no se observa en ninguno de los …