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2

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Ggplot2 Upwork freelancers typically receive a client rating of 4.80.

4.80
Last updated: September 1, 2015
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  1. David Stephens

    David Stephens

    Data Analyst

    United Kingdom - Tests: 2

    Hello, I am a Data Analyst with 5+ years professional experience with a background in scientific research including publishing peer-reviewed papers. I have BSc (1st class honours) in Geographical Information Systems and Science. I am most interested in contracts that would take advantage of my R skills for data analysis and visualisation. Including: geospatial analysis, statistical modelling, data mining or building shiny data apps. A summary of my skills and experience: - Diverse types of research including geospatial analysis, statistical modelling, image analysis, GIS. - Daily use of R with experience of packages such as: dplyr, ggplot2, caret, sp, rgdal, gstat. - Developing interactive data tools using R’s ‘Shiny’ framework - Also have experience scripting in Python and SQL Statisitcs: - Linear regression, principal component analysis, t-tests. - Machine learning algorithms (random forest, neural networks) - Cluster Analysis (unsupervised classification) - Non-parametric significance testing (monte-carlo simulations) - Geo-statistical Interpolation (kriging) Other: - Image Analysis: Object-based image segmentation - Textural analysis for pattern recognition - Working with PostgreSQL/postGIS databases - Software: ESRI ArcGIS; Erdas Image; GRASS; QGIS; eCognition; SPSS.

    $35.00 /hr
    0 hours
    0.00
  2. Pavel Logacev

    Pavel Logacev

    Data Science | Statistics | R Programming

    Germany - Tests: 4 - Portfolio: 3

    I have a PhD in Cognitive Science and a MSc in Computational Linguistics, as well as several years of experience in statistical data analysis and software development in R. I have developed software in pure R as well as in C/C++/Rcpp, with a focus on the implementation of machine learning algorithms and statistical techniques. I enjoy understanding all kinds of data, as well as helping others understand it and convert it into actionable intelligence. I am particularly interested in churn analysis and statistical consulting regarding usability studies or A/B testing in advertisement and e-commerce. I have experience in analyzing and reporting on data from sectors as diverse as psychology, education, health, finance, SEO and E-commerce. Most recently, I have analyzed online user behavior for www.immobilienscout24.de, and created a Bayesian model of conversion and profitability to manage campaigns on Google Adwords. I specialize in churn analysis and survival random forests, but I can help you with anything from simple ANOVAs or linear mixed effects models in lme4 to Bayesian methods in RStan. Take a look at my code on my github profile: http://github.com/plogacev

    $45.00 /hr
    502 hours
    4.93
  3. Alexander G.

    Alexander G. Agency Contractor

    Data Scientist and Data Products Developer, PhD

    Belarus - Tests: 2 - Portfolio: 2

    Looking for opportunities in the field of data analysis, machine learning and modeling. Experienced in statistics, optimizations, text analysis and data visualization (R, dplyr / plyr, ggplot2 / ggvis, Rcpp, tm, etc.) as far as other related technologies of R ecosystem (Shiny, openCPU, DeployR, etc.). Have good knowledge of database programming (PostgreSQL, sqlite, etc.)

    Associated with: Altasapiens

    $50.00 /hr
    954 hours
    5.00
  4. Adam Wisseman

    Adam Wisseman

    Data Mining Scientist

    United States

    I am a trained data scientist with a great deal of proficiency in R and SQL. My main interest lies in creating beautiful data visualizations that tell a compelling story. I am proficient in dealing with data in a variety of formats. My day job mainly involves extracting satellite and geospatial data from various databases (Oracle and Teradata) in order to build models to validate crop insurance claims. To accomplish this task, I have written an R package of data cleaning, visualization, and modeling tools specific to these data sets. I have also created a Shiny dashboard for model visualization and diagnostics. I look forward to discussing your data modeling and visualization needs!

    $27.78 /hr
    0 hours
    0.00
  5. Janet Prumachuk

    Janet Prumachuk

    Data scientist

    United States - Portfolio: 4

    I am currently studying Data Science at Columbia University's Data Science Institute. I have a masters in Statistics from NYU's Stern School of Business and a bachelors in Computer Science. I also have a certification in web development from NYU and I have completed the graphic design basic core at Parsons. Previously I worked in the technology division of a global investment bank where among other things I led the development of an analytic reporting and data warehouse application for the private wealth management business. More recently my focus has been on data visualization and machine learning. I am interested in data science for social impact and in creating data-driven tools and analytics for the general consumer.

    $40.00 /hr
    0 hours
    0.00
  6. Edward S.

    Edward S.

    Python and R afficionado - web scraping, API scraping and more

    United States - Tests: 2

    I'm a 5-year Python veteran with interests in Web Scraping, Desktop Application design and more. While I can build an application from scratch, I'm also open to collecting and cleaning up data from any source to help your business grow. I am also an experienced (> 6 years) teacher and would be glad to show you how to use Python, R or any other programming language to attain your goals. Feel free to reach out with any questions!

    $19.00 /hr
    0 hours
    0.00
  7. Gilles C.

    Gilles C.

    Experienced Web and iOS strategist & developer focused on data science

    Switzerland

    I'm a passionate and multifaceted intrapreneur helping create more value out of internet technologies since 1997. My current focus revolves around applying data science to the fields of quantified-self, crowd-funding, the sharing economy and other transformative technologies. I have more than 8 eights web and mobile development and product management experience. Technologies includes Django, Ruby on Rails and iOS.

    $90.00 /hr
    0 hours
    0.00
  8. Artem Shevchenko

    Artem Shevchenko

    Analyst and data viz enthusiast

    Russia

    I have several years of business analytics, data science and management, including past two years in airport industry. I've been doing analytics/dataviz for various tasks ranging from route network development to process optimization, visual reporting and forecasting. I have a wealth of experience using analytical tools from broad msexcel/R to more niche ones like Open Refine. I extensively use vusialisations in my work on both exploratory (ggplot2, excel) and presentation levels (d3.js). I have a friendly, professional demeanor, tend to focus deeply on each individual task, allowing me to achieve exceeding results. I'm a quick learner and enthusiast. I look forward to working with you as analytics/dataviz specialist on any project my skills may be of assistance.

    $14.50 /hr
    0 hours
    0.00