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02 Cleaning and Standardization

Cleaning and Standardization - Exercise

This workflow shows a hands-on exercise in the L1-DS Introduction to KNIME Analytics Platform for Data Scientists - Basics course

Task 1: Row Filtering1. Read the adult.csv file by executing the CSV Reader node2. Filter out rows where the marital status is missing3. Extract rows where - the marital status is divorced- the marital status is never married and age is between 20 and 40 (both included)- the workclass starts with "S" Task 2: Column Filtering1. Read the adult_education.table file by executing the Table Reader node2. Exclude the "education-num" column- manually- by including only string type columns Task 3: Data Transformation1. Work with the adult.csv data again and create a new column "work-status" with thevalue "full-time" if the weekly working hours are >=40 and "part-time" otherwise2. Replace the hyphen in "United-States" by a space character in the "native-country"column3. Create a new column "year-of-birth" by substracting the age number from 1994,which is the year when the data were collected 4. OPTIONAL: Replicate the tasks 3 & 4 with the Column Expressions node Node 27filter out rows with phone service status missingNo statusYes statusPayment method starts with ETenure range between 20 and 40full or part tenure columnReplace - with a spaceNode 35Node 36Node 37exclude senior citizen manuallyexclude senior citizen type selection CSV Reader Row Filter Row Filter Row Filter Row Filter Row Filter Rule Engine String Manipulation Math Formula Column Expressions CSV Reader Column Filter Column Filter Task 1: Row Filtering1. Read the adult.csv file by executing the CSV Reader node2. Filter out rows where the marital status is missing3. Extract rows where - the marital status is divorced- the marital status is never married and age is between 20 and 40 (both included)- the workclass starts with "S" Task 2: Column Filtering1. Read the adult_education.table file by executing the Table Reader node2. Exclude the "education-num" column- manually- by including only string type columns Task 3: Data Transformation1. Work with the adult.csv data again and create a new column "work-status" with thevalue "full-time" if the weekly working hours are >=40 and "part-time" otherwise2. Replace the hyphen in "United-States" by a space character in the "native-country"column3. Create a new column "year-of-birth" by substracting the age number from 1994,which is the year when the data were collected 4. OPTIONAL: Replicate the tasks 3 & 4 with the Column Expressions node Node 27filter out rows with phone service status missingNo statusYes statusPayment method starts with ETenure range between 20 and 40full or part tenure columnReplace - with a spaceNode 35Node 36Node 37exclude senior citizen manuallyexclude senior citizen type selection CSV Reader Row Filter Row Filter Row Filter Row Filter Row Filter Rule Engine String Manipulation Math Formula Column Expressions CSV Reader Column Filter Column Filter

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To use this workflow in KNIME, download it from the below URL and open it in KNIME:

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Created by: Maarit Laukkanen
Created at: 2020-04-20
On NodePit since: 2023-02-26
Last update: 2024-11-21
Created with KNIME version: v4.7.0
Tags: row filtercolumn filterrule enginecolumn expressionseducation

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