Object Oriented Programming in R, Part 1: The Basics
The main purpose of object-oriented programming (OOP) is to efficiently manage complexity. It is a way of organizing code and data such that you can develop well delimited abstractions.
2
Omar Trejo
Mentor
(45 reviews)
US$50.00
For every 15 mins
106
Sessions/Jobs
ABOUT ME
I build strategic technologies for data-intensive companies
I build strategic technologies for data-intensive companies
ML Engineer & Consultant. I help data-intensive companies be smarter and faster by building strategic technologies, coaching teams, and publishing content. My background is in Mathematics and Economics, and I have been doing ML Engineering for 10+ years. Book author of "R Programming by Example" (Packt, 2017). National Data Science Champion (Mexico, 2014). 8th Place at National Mathematics Contest (Mexico, 2009).
Spanish, English
Mexico City (-06:00)
Joined June 2016
EXPERTISE
4 years experience
I help organizations develop and implement data strategies and architectures. These include choosing the correct tools for each project g...
I help organizations develop and implement data strategies and architectures. These include choosing the correct tools for each project given its goals, restrictions, and other context, as well as non-functional requirements.
6 years experience
I help organizations analyze many kinds of data. I can use mathematical, economical, and statistical models using Python or R. The result...
I help organizations analyze many kinds of data. I can use mathematical, economical, and statistical models using Python or R. The results can be communicated through meetings, documents, dashboards, alerts, and other tools.
10 years experience
1st place for the 2014 National Data Science Contest in Mexico. It was organized by Mexico's Presidential Office. I was part of a team of...
1st place for the 2014 National Data Science Contest in Mexico. It was organized by Mexico's Presidential Office. I was part of a team of two people and focused on creating a prototype for an emergency system that used Twitter's data to detect ongoing events and provided ways to coordinate authorities if needed.
4 years experience
Most of the time clients prefer explaining data with visualizations, as it makes it much more intuitive to understand what's going on. Go...
Most of the time clients prefer explaining data with visualizations, as it makes it much more intuitive to understand what's going on. Good data visualizations are easily understood and convey a specific argument. I can help clients visualize various types of data in creative and effective ways.
10 years experience | 2 endorsements
I have a BSc in Mathematics with a focus on Statistics, and Machine Learning. I can work through all phases of machine learning pojects, ...
I have a BSc in Mathematics with a focus on Statistics, and Machine Learning. I can work through all phases of machine learning pojects, as well as explain how they work and how to develop ensembles. My current research area of interest is on distributed machine learning.
5 years experience
I've helped organizations develop data platforms that makes use of simple dashboards to constantly report results as well as complex inte...
I've helped organizations develop data platforms that makes use of simple dashboards to constantly report results as well as complex interfaces for machine learning implementations in the backend. I like using Python and TypeScript to create these web applications, but I can adapt to other technologies quickly.
4 years experience
I have solid knowledge about Object-Oriented Programming (OOP) techniques and patterns. I can help you understand when specific patterns ...
I have solid knowledge about Object-Oriented Programming (OOP) techniques and patterns. I can help you understand when specific patterns are useful and trade-offs among them. I can help you with code reviews to make sure your code follows SOLID principles, is easily maintainable, flexible and robust.
REVIEWS FROM CLIENTS
(45 reviews)
Steve
February 2020
Omar is a life saving data and coding wizard... He will cast a spell on your data to make quantitative results magically appear!
I gave Omar 5 stars for a reason and would highly recommend that you contact him when you need something impossible pulled out of a hat.
Steve
February 2020
Omar is a dedicated professional that knows how to get things done even under time pressure. After a last minute change he spent his entire Saturday night working live with me until the early hours of Sunday morning to make sure that I got my project completed ahead of a deadline.
Hire Omar when you need something done and you need it to be right. Trust me on this one.
Steve
January 2020
Omar is incredibly capable and helpful. He helped me to devise solutions to some of my technical data problems in R and was a pleasure to deal with in terms of quoting as well as executing freelance jobs that he helped me with. Omar will be my first port of call with any future data/database issues, as well as R related problems, and I would highly recommend him to other codementor users.
Steve
January 2020
Omar is incredibly capable and helpful. He helped me to devise solutions to some of my technical data problems in R and was a pleasure to deal with in terms of quoting as well as executing freelance jobs that he helped me with. Omar will be my first port of call with any future data/database issues, as well as R related problems, and I would highly recommend him to other codementor users.
johan palmberg
April 2019
Excellent as always
johan palmberg
January 2019
First time request with a large budget. Omar was quick to understand the brief. Came back very quickly with interim results of his work for review, was flexible on time for video calls and delivered as requested on time and budget. Hugely impressed and will use again. Many thanks Omar
Addison Mincham
May 2018
Brillaint
Addison Mincham
May 2018
Brilliant, couldnt reccommend more for any job that you have. INformative, and quick to respond :)
Ash Aleshi
March 2018
Omar is an exceptional programmer and developer with a multitude of skills. Omar helped me build from scratch a blockchain prototype in less than a week by coding the logic in Python, setting up a docker environment and working with Hyperledger Sawtooth. He was quick to provide updates and message throughout the entire process. Highly recommend!
Mike Weiksner
January 2018
A couple of unanticipated bumps, but we worked through them. Patient and thorough. Recommended.
SOCIAL PRESENCE
twitter-geo-search
Twitter search for specified keywords within a geographic zone using R
R
2
1
bootstrap-confidence-intervals
Confidence intervals analysis using Matlab
Matlab
1
1
648 Reputation
1
6
18
EMPLOYMENTS
ML Engineer & Consultant
Delta Lab
2020-06-01-Present
If you continuously make decisions based on data and you're not leveraging smart algorithms, we should talk. You can significantly increa...
If you continuously make decisions based on data and you're not leveraging smart algorithms, we should talk. You can significantly increase your operational performance with solutions custom-built for you. The average payback period is six months.
Machine Learning
Statistics
Data Science
View more
Machine Learning
Statistics
Data Science
Data Engineering
Operations Research
Cloud Engineering
Systems thinking
View more
Research Assistant
ITAM
2014-08-01-Present
Develop tools for data analysis focused on trade economics.
Develop tools for data analysis focused on trade economics.
Python
R
LaTeX
View more
Python
R
LaTeX
Data Visualization
View more
Co-founder
Datata
2014-08-01-Present
Data and software consulting and development firm.
Data and software consulting and development firm.
Python
Django
Machine Learning
View more
Python
Django
Machine Learning
TypeScript
Data Science
Data Engineering
Angular 4
View more