Panel Data¶

Size¶

pdAllBalanced	Returns an indicator of whether all groups in a panel dataset covers the maximum time span.
pdAllConsecutive	Returns an indicator of whether all groups in a panel dataset covers consecutive time periods.
pdIsBalanced	Returns an indicator of whether each group in a panel dataset covers the maximum time span.
pdIsConsecutive	Returns an indicator of whether each group in a panel dataset covers consecutive time periods.
pdSize	Returns the number of groups, number of time observations for each group, an indicator of strong balance.
pdTimeSpans	Returns the start date and end date of each requested variable.

aggregate	Aggregates the data in the columns of a matrix or dataframe based upon a column containing group ids with a choice of method.
dfLonger	Converts a GAUSS dataframe in long panel format to wide panel format.
dfWider	Converts a GAUSS dataframe in wide panel format to long panel format.
pdBalance	Balances an unbalanced panel, ensuring that each group has the same time periods. This can be accomplished by filling in or dropping observations.
pdDiff	Computes time series differences of panel data.
pdLag	Computes time series lags of panel data.
reclassify	Replaces specified values of a matrix, array or string array.
reclassifyCuts	Replaces values of a matrix or array within specified ranges.

dfappend	Vertically concatenates (or stacks) two dataframes.
innerJoin	Performs a left, or full, outer join on two matrices based upon user-specified key columns.
insertcols	Inserts one or more new columns into a matrix or dataframe at a specified location.
outerJoin	Joins two matrices, or dataframes based upon user-specified key columns, with non-matching rows removed.
pdSort	Sorts panel data based on automatically detected group and date variable.
sortmc	Sorts a matrix on multiple columns.
where	Returns elements from `a` or `b`, depending on `condition`.

dropduplicates	Drops duplicate observations from data.
getduplicates	Identifies duplicate observations and prints report.
isunique	Checks if all observations in the matrix or dataframe are unique.
isrowunique	Returns a binary vector with a one for every row that is unique, otherwise a zero.

aggregate	Aggregates the data in the columns of a matrix or dataframe based upon a column containing group ids with a choice of method.
pdSummary	Returns summary statistics for panel data, including overall, between-group, and within-group statistics.

frequency	Generates frequency table.
plotFreq	Creates frequency plot for specified categorical variable.
tabulate	Computes and returns two-way tables of frequencies.

isinfnanmiss	Returns true if the argument contains an infinity, NaN, or missing value.
ismiss	Returns 1 if matrix has any missing values, 0 otherwise.
miss, missrv	Creates a scalar missing value, or converts (or replaces) specified elements in a matrix to GAUSS’s missing value code.
missex	Converts numeric values to the missing value code according to the values given in a logical expression.
msym	Controls the symbol printed to represent missing values.
packr	Deletes the rows of a matrix that contain any missing values.
scalmiss	Returns 1 if the input is a scalar missing value.

between	Indicates whether elements in a matrix fall between a specified lower and upper bound.
contains	Indicates whether one matrix, multidimensional array or string array contains any elements from another symbol.
counts	Returns number of elements of a vector falling in specified ranges.
countwts	Returns weighted count of elements of a vector falling in specified ranges.
indexcat	Returns indices of elements falling within a specified range.
indnv	Checks one numeric vector against another and returns the indices of the elements of the first vector in the second vector.
isempty	Checks whether a symbol is an empty matrix.
ismember	Checks whether each element of a matrix or string array matches any element from a separate symbol.
maxindc	Returns row number of largest element in each column of a matrix.
minindc	Returns row number of smallest element in each column of a matrix.
rowcontains	Checks whether any element in the row of a matrix or string array matches any element from a separate symbol.

getcollabels	Returns the unique set of column labels and corresponding key values for a categorical variable.
recodeCatLabels	Replaces the labels in a categorical variable of a dataframe.
reorderCatLabels	Changes the order of the labels in a categorical variable of a dataframe.
setBaseCat	Sets a specified category to be the base case for a categorical variable.

These functions can be used to fix errors in categorical labels.

strreplace	Replaces a substring within a categorical label or string element.
strtof	Converts a string or categorical variable of a dataframe to a numeric variable.
strtrim	Strips all white space characters from the left and right side of each element in a categorical variable or string array.
strtriml	Strips all white space characters from the left side of each element in a categorical variable or string array.
strtrimr	Strips all white space characters from the right side of each element in a categorical variable or string array.