Products

Data
	Describe data	Describe data in memory
		Describe data in file
		Describe data contents (codebook)
		Inspect variables

		List data

		Summary statistics
	Create or change data	Create a new Variable
		Create a new Variable (extended)
		Other variable creation commands	Interaction expansion
			Create indicator variables
			Fillin missing values
			Linear interpolate/extrapolation values
			Draw sample from normal distribution
			Create dataset with specific correlation
			Orthoranalize variables
			Orthorganal polynomimials
			Create fractional polynomial powers
			Linear and cubic spline construction
			Zero skewness log transform
			Box-Cox transformation
			Generate numerical range
			Calculate numerical derivatives
			Calculate numerical integrals
		Change contents of a variable
		Other variable transformation commands	Convert data between long and wide
			Encode value labels from string variable
			Decode string from label numeric value
			Convert variables from string to numeric
			Recode categorical variables
			Change missing values to numeric
			Change numeric values to missing
			Duplicate observations
			Duplicate clustered observations
			Make dataset of frequencies
			Make dataset of means, mediums, etc.
			Rectangularize dataset
			Create separate variables
			Split string variables into parts
			Stack data
			Interchange observations and variables
		Keep or drop observations
		Variable manager
	Data Utilities	Label Utilities	Label data set
			Label variables
			Manage value labels
			Assign value labels to variables
			Prepend values to value labels
			Copy Value labels
			List value labels
			Produce Codebook of value labels
			Save value labels as ado files
			Create data set of value labels
		Note Utilities	List of search note
			renumber notes
		Rename variables
		Change order of variables
		Compare two variables
		Compare two data sets
		Optimize data set
		Check for unique identifiers
		Manage duplicate observations
		Count observation satisfying conditions
	Sort	Ascending sort
		Ascending and descending sort
	Combine data sets	Merge two data sets
		Form all pairwise combination within groups
		Append datasets
		Form every pairwise combination of two data sets
	Matrices, Mata
	Matrices, ado language	Input matrix by hand
		Define matrix from expression
		Convert variables to matrix
		List contents of matrix
		Rename a matrix
		Drop matrices
		Eigenvalues and Eigenvectors of symmetric matrices
		Singular value decomposition
		Eigenvalues of Square matrices
	Other utilities	Hand calculator
		List contents and system parameters
		Manage data signature
		ICD9 Utilities	Verify if variable is valid
			Clean and verify variable
			Generate new variable from existing
			Display code descriptions
			Search for codes from descriptions
			Display ICD9 code source