# Tiny Project

## List of problems to be solved

### 1. Filter out data that conform both criteria A and criteria B.

Explain:

A dataset that recording descriptions of COVID-19 positive patients.(The following data is not the real data)

|Age|Gender|Days post onset of symptoms|IgM|IgG|
|---|------|---------------------------|---|---|
|17|Female|27|negative|positive|
|28|Male|8|positive|negative|
|75|Male|41|positive|positive|
|44|Female|22|negative|negative|
|22|Female|28|negative|positive|
|67|Male|14|positive|positive|

Approach 1. Group by ages and find the distribution of IgM/IgG states.
|Stages|Ages|M+/G+|M+/G-|M-/G+|G-/G-|
|------|----|-----|-----|-----|-----|
|Youth|<18|||||
|Adolescent|18-44|||||
|Middle age|45-59|||||
|Old adult|60-74|||||
|Elder|>74|||||

Approach 2. Group by days post onset of symptoms and find the distribution of IgM/IgG states.
|Days post onset of symptoms|M+/G+|M+/G-|M-/G+|G-/G-|
|----|-----|-----|-----|-----|
|0-7|||||
|8-14|||||
|15-21|||||
|22-28|||||
|29-35|||||
|>35|||||