Andras R. Profile

4.9

(18 reviews)

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$35 USD / hour

pécel,

hungary

$35 USD / hour

It's currently 7:57 AM here

Joined December 26, 2015

0 Recommendations

Andras R.

@yrax

4.9

(18 reviews)

4.6

84%

$35 USD / hour

pécel,

hungary

$35 USD / hour

85%

Jobs Completed

97%

On Budget

97%

On Time

33%

Repeat Hire Rate

Expert in R programming, SPSS, Excel, VBA, stats

I have been working as a statistician for over 15 years. My strongest skills are related to SPSS Statistics and R programming language. In the past five or six years, I am primarily interested in data mining and machine learning algorithms. I participated in several forecasting and classification project in telco industry and market research. Recently I also earned a few online certificates in the field of data science. Currently I work for a market research company as methodology expert and senior researcher. My responsibilities include the complete survey workflow from requirements to presentation, including questionnaire and sample design, data collection, cleaning, analysing and report writing. I'm also experienced in working with relational databases (MS Access, MySQL. MS SQL) and extremely large datasets such as client database and call detail records of mobile phone companies (millions of records / day) etc. I also have strong skills in Excel automation and VBA.

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Portfolio

A customer value prediction and classification project for telecommunications company.

Data mining project using KNIME analytic platform

An Excel-based interactive analytic tool that: takes MaxDiff importance scores derived from survey data; allows user to specify features; performs a TURF analysis on the user-specified features; and produces a variety of outputs: summary tables, detailed lists, charts. (Attached: Excel user interface; part of output; piece of VBA code)

Channel optimization for cable TV company

A collection of SPSS scripts and VBA macros that produce raw SPSS output in a standardized format, and then process the outputs and feed them into formatted Excel worksheets. (Attached: raw SPSS output and formatted Excel worksheet)

Automated output processing system for survey projects

Analysis of survey data: visualisation of Van Westendorp Price Test results
(piece of code and one of the resulting charts generated in R)

Analyzing survey data using R

Predictive model based on ACA (Adaptive Conjoint Analysis) data implemented in an interactive analytic tool in Excel using VBA.

Interactive analytic tool for ACA data for telco company

Data mining project using KNIME analytic platform

Channel optimization for cable TV company

Automated output processing system for survey projects

Analyzing survey data using R

Interactive analytic tool for ACA data for telco company

Reviews

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Showing 1 - 5 out of 18 reviews

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1.0

$500.00 USD

Design and create an artificial deep neural network

The project is not completed according to the dispute

Riley F.

@RJFlorsheim

•

7 years ago

5.0

$100.00 USD

Project for yrax

Very Talented and professional. An Expert in R. Will work with him again.

Web Scraping

Statistics

Visual Basic for Apps

R Programming Language

+1 more

Dummy

@mongo123

•

8 years ago

5.0

$50.00 USD

R programming

Awesome!!!Will reach him again. Very quick and skilled. Very Prompt.

R Programming Language

Dummy

@mongo123

•

8 years ago

0.0

$90.00 USD

Modify Technical Report

The project is not completed according to the dispute

Technical Writing

Report Writing

Ami A.

@Ashersoft

•

8 years ago

5.0

$599.00 USD

Translate stata code to r

Yrax did a great job translating Stata code to R. He was efficient and accurate and asked questions when it wasn't clear what I was trying to do.

R Programming Language

Statistical Analysis

Closed User

@judykitch

•

8 years ago

Education

Statistics MSc

Eötvös Loránd Tudományegyetem,

Hungary

1998 - 2000

(2 years)

Sociology MSc

Eötvös Loránd Tudományegyetem,

Hungary

1995 - 2000

(5 years)

Qualifications

Johns Hopkins University on Coursera

2015

https://www.coursera.org/account/accomplishments/records/jWCmX48dsandqts5 Data products automate complex analysis tasks or use technology to expand the utility of a data informed model, algorithm or inference. This course covers the basics of creating data products using Shiny, R packages, and interactive graphics. The course will focus on the statistical fundamentals of creating a data product that can be used to tell a story about data to a mass audience.

Johns Hopkins University on Coursera

2015

https://www.coursera.org/account/accomplishments/records/2Jbpm8BPkqMS2gNB The course will also introduce a range of model based and algorithmic machine learning methods including regression, classification trees, Naive Bayes, and random forests. The course will cover the complete process of building prediction functions including data collection, feature creation, algorithms, and evaluation.

Johns Hopkins University on Coursera

2015

https://www.coursera.org/account/accomplishments/records/SPZVngcyBLupxDVk Linear models, as their name implies, relates an outcome to a set of predictors of interest using linear assumptions. Regression models, a subset of linear models, are the most important statistical analysis tool in a data scientist’s toolkit. This course covers regression analysis, least squares and inference using regression models. Special cases of the regression model, ANOVA and ANCOVA will be covered as well.