Data Science with OAC Best Practises

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[email protected] www.rittmanmead.com @rittmanmead Data Science Best Practises with OAC Francesco Tisiot BI Tech Lead at Rittman Mead

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[email protected] www.rittmanmead.com @rittmanmead !2 Francesco Tisiot BI Tech Lead at Rittman Mead Verona, Italy Rittman Mead Blog 10 Years Experience in BI/Analytics [email protected] @FTisiot Oracle ACE

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Specialised in data visualisation, predictive analytics, enterprise reporting and data engineering. Enabling the business, the consumers, the data providers and IT to work towards a common goal, delivering innovative and cost-effective solutions based on our core values of thought leadership, hard work and honesty. We work across multiple verticals on projects that range from mature, large scale implementations to proofs of concept and can provide skills in development, architecture, delivery, training and support. www.rittmanmead.com [email protected] @rittmanmead

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Before Starting…. Deﬁne the Problem!

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Task Experience Performance Classify Spam/Not Spam TEP Corpus of Emails market as Spam/Not Spam Accuracy

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Become a Data Scientist with OAC Connect

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Connection Options in OAC Pre-Deﬁned Data Models Data Sources

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Select Relevant Columns and Apply Filters

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Become a Data Scientist with OAC Connect Clean

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Cleaning What? N/A Missing Values Mark <> MArk Wrong Values City “Rome” Irrelevant Observations Role: CIO Salary:500 K$ Handling Outliers Train: 80% Test: 20% Train/Test Set Split Col1 -> Name Labelling Columns 0-200k 0-1 Feature Scaling # Of Clicks Aggregation

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Cleaning How? Data Flows - Filter - Aggregate - Join

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0-200k 0-1 Feature Scaling Train: 80% Test: 20% Train/Test Set Split Col1 -> Name Labelling Columns City “Rome” Irrelevant Observations Mark <> MArk Wrong Values Cleaning What? N/A Missing Values Role: CIO Salary:500 K$ Handling Outliers CASE … WHEN… UPPER FILTER COLUMN RENAME FILTER KPI/ (MAX-MIN) FILTER? # of Clicks Aggragation COUNT

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How To Find Outliers? One Dimension

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Become a Data Scientist with OAC Connect Clean Transform & Enrich

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Feature Engineering Location -> ZIP Code 2 Locations -> Distance Name -> Sex Day/Month/Year -> Date Data Flow Additional Data Sources?

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Data Preparation Recommendations

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Become a Data Scientist with OAC Connect Clean Transform & Enrich Analyse

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Data Overview

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Explain

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Explain - Key Drivers

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Become a Data Scientist with OAC Connect Clean Analyse Train & Evaluate Transform & Enrich

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What Problem are we Trying to Solve? Supervised Unsupervised “I want to predict the value of Y, here are some examples” “Here is a dataset, make sense out of it!” Classiﬁcation Regression https://towardsdatascience.com/supervised-vs-unsupervised-learning-14f68e32ea8d Clustering

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Easy Models

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DataFlow Train Model

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Which Model - Parameters To Pick?

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Select, Try, Save, Change, Try, Save …..

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Compare

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Compare

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Become a Data Scientist with OAC Connect Clean Analyse Train & Evaluate Predict Transform & Enrich

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Use On the Fly

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Step of a Data Flow

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http://ritt.md/OAC-datascience

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[email protected] www.rittmanmead.com @rittmanmead Data Science Best Practises with OAC Francesco Tisiot BI Tech Lead at Rittman Mead