index data lakes data marts data modeling data preparation and analysisipython notebook files data retrieval see retrieving data data science process - benefits and uses of - building models - model and variable selection - model diagnostics and model comparison - model execution - cleansing data - data entry errors - deviations from code book different levels of aggregation different units of measurement impossible values and sanity checks missing values - outliers - overview - redundant whitespace combining data from different sources - appending tables different ways of enriching aggregated measures - joining tables - using views to simulate data joins and appends correcting errors early - creating project charter - defining research goals exploratory data analysis - machine learning - overview of - presenting findings and building applications on them retrieving data - data quality checks overview shopping around - starting with data stored within company transforming data overview reducing number of variables - turning variables into dummies - data storing in hive on hadoop overview data transformation data visualization see visualizing data data warehouses database normalization databases data gov datakind data_processing(function datascience category data worldbank org date variablecrossfilter day variablecrossfilter dc css file dc js file creating interactive dashboard with - setting up dc js application - dc min js file dc redrawall(method dc renderall(method debian repository decision tree classifier - decision treespruning decisionsidentifying and supporting decisiontreedata json deepmind default portfor elasticsearch api delete statementcypher deletion operation denial of service see doa denormalization developer default option deviations from code book diagnosticsmodels - different (correctspelling digits images dimension(method dimple directed graph dispy library distributed file systems distributed programming framework tags - django rest framework doa (denial of service doctype mapping - document classification document store database - document-term matrix - download optionsof mysql installers dropbox dt tag dummy variables easy_install eda (exploratory data analysis - edge componentnetwork data edges edx elasticsearch - elasticsearch /bin folder elasticsearch repo elasticsearch zip package elasticsearch-py elasticsearchsetting up - linux installation - windows installation - elasticsearch(function emp_title option ensemble learning entities entropy epoch error measures errorscorrecting early - etl (extracttransformand load phase euclidean distance eventual consistency principle ex tag expanding data sets exploratory data analysis see eda