You will get clean, consistent, and analysis-ready data from your raw files
Project details
Reliable analysis starts with reliable data. I will inspect, clean, and organize your CSV or Excel dataset according to your goals and agreed rules.
Depending on the dataset, the service may include removing duplicates, handling or flagging missing values, correcting data types, standardizing dates, numbers, text, and category labels, removing extra spaces, identifying invalid or inconsistent values, renaming columns, and running basic quality checks.
I will not silently invent missing information or remove uncertain records. Important decisions will follow your instructions or be documented in the change log.
You will receive a cleaned CSV or XLSX file, a concise change log, and basic data-quality notes. Starter covers one main table in one file. Missing values are handled only by an agreed rule. Manual research, fact verification, PDF extraction, web scraping, machine learning, and advanced analysis are not included.
Please contact me before ordering if your data contains several related tables, complex validation rules, or more rows than the selected package includes.
Depending on the dataset, the service may include removing duplicates, handling or flagging missing values, correcting data types, standardizing dates, numbers, text, and category labels, removing extra spaces, identifying invalid or inconsistent values, renaming columns, and running basic quality checks.
I will not silently invent missing information or remove uncertain records. Important decisions will follow your instructions or be documented in the change log.
You will receive a cleaned CSV or XLSX file, a concise change log, and basic data-quality notes. Starter covers one main table in one file. Missing values are handled only by an agreed rule. Manual research, fact verification, PDF extraction, web scraping, machine learning, and advanced analysis are not included.
Please contact me before ordering if your data contains several related tables, complex validation rules, or more rows than the selected package includes.
Data Tool
pandasWhat's included
| Service Tiers |
Starter
$10
|
Standard
$30
|
Advanced
$65
|
|---|---|---|---|
| Delivery Time | 2 days | 3 days | 5 days |
Number of Revisions | 1 | 2 | 2 |
Frequently asked questions
About By
Mathematical Modeling & Data Analysis
Hangzhou, China - 1:36 pm local time
I can help with:
• Data cleaning, analysis, and visualization
• Mathematical modeling and optimization
• Statistical analysis and regression
• Python-based numerical computation
• MATLAB modeling and simulation
• LaTeX formatting and technical reports
I provide clear code, organized results, and explanations of the methods used. I am suitable for small data-analysis tasks, mathematical problems, modeling projects, and research support
Steps for completing your project
After purchasing the project, send requirements so By can start the project.
Delivery time starts when By receives requirements from you.
By works on your project following the steps below.
Revisions may occur after the delivery date.
Review the dataset and cleaning goals
I will inspect the file structure, data types, missing values, duplicates, and the cleaning rules you provide.
Clean and standardize the data
I will apply the agreed rules, standardize formats and labels, and preserve uncertain records unless removal is explicitly approved.