Package uk.ac.starlink.ttools.filter

Interface Summary

Interface	Description
ColumnSupplement	Defines additional column metadata and data for supplementing the existing columns in a StarTable.
ProcessingFilter	Defines a type of filter-like processing which can be done on a StarTable.
ProcessingStep	Represents one step of a table processing pipeline.
Quantiler	Calculates quantile values given a sequence of data samples.
SupplementData	Accessor for the data supplied by columns in an associated ColumnSupplement.
UnivariateStats.ArrayStats	Aggregates statistics acquired from a column whose values are fixed-length numeric arrays.

Class Summary

Class	Description
AddColumnFilter	Table filter for adding a single synthetic column.
AddColumnsTable	Wrapper table which adds another table to it by placing all the columns of the added table together with the existing columns.
AddSkyCoordsFilter	Filter used for converting sky coordinates from one system to another.
ArrayReader	Reads values from a typed numeric array.
AssertFilter	Filter for making algebraic (JEL) assertions about table data contents.
BadValueFilter	Filter for replacing magic values with blanks.
BasicFilter	Basic implementation of ProcessingFilter methods.
CacheFilter	Processing step which caches the current table in a disk or memory cache (according to the default StoragePolicy).
CalculatorColumnSupplement	ColumnSupplement whose columns are derived by calculating values based on all the columns of another table.
CheckFilter	Processing step which runs the Tables.checkTable(uk.ac.starlink.table.StarTable) diagnostic.
ClearParameterFilter	Filter which removes parameters from a table.
CollapseColsFilter	Table filter for collapsing multiple scalar columns into an array column.
ColumnMetadataFilter	Filter to alter metadata of one or more columns.
ConstFilter	Filter for identifying and removing columns with constant content.
DeleteColumnFilter	Table filter for deleting a single column.
EveryFilter
EveryTable	Wrapper table which looks at only every n'th row.
ExplodeAllFilter	Table filter for replacing every N-element array valued column in a table with N scalar-valued columns.
ExplodeColsFilter	Table filter for replacing selected N-element array-valued columns with N scalar-valued columns.
FixNamesFilter	Filter to normalise syntax of column and parameter names so they are legal java identifiers.
GKArray	An implementation of the quantile sketch of Greenwald and Khanna.
GKQuantiler	Quantiler based on the method of Greenwald and Kanna, via the implementation in https://github.com/DataDog/sketches-java.
GroupFilter	Filter version of TGROUP task.
HeadFilter	Filter for picking only the first few rows of a table.
HeadTable	Wrapper table implementation which only contains the first N rows of its base table.
HealpixMetadataFilter	Filter to manipulate HEALPix-specific metadata of a table supposed to contain HEALPix pixel data.
JELColumnSupplement	ColumnSupplement that generates new columns based on JEL expressions.
JELSelectorTable	Sequential table which selects rows on the basis of a JEL-interpreted expression.
KeepColumnFilter	Table filter for selecting a number of columns and discarding the rest.
MetadataFilter	Filter for extracting column metadata.
NameFilter	Filter which renames a table.
PermutedColumnSupplement	ColumnSupplement implementation which contains a selection of the columns in the base table.
PixSampleFilter	Filter for sampling pixel data from a HEALPix all-sky table file.
ProgressFilter	Processing step which writes table progress to the terminal.
RandomFilter	Processing step which calls the Tables.randomTable(uk.ac.starlink.table.StarTable) utility.
RandomViewFilter	Processing filter that makes sure any RowSequence taken out on a table uses calls to random table access methods.
RangeFilter	Filter for selecting a contiguous range of rows.
RepeatFilter	Filter for repeating a table's rows multiple times.
RepeatTable	Wrapper table which repeats the rows of the base table multiple times.
ReplaceColumnFilter
ReplaceValueFilter	Filter for replacing a given value with another one in a list of columns.
ReplaceValueTable	Wrapper table which makes replacements of named values with other named values in some of its columns.
ResolverFilter	Filter which adds RA, Dec coordinate columns by performing name resolution using an external service.
SelectFilter	Table filter for selecting only certain rows using a JEL expression.
SequentialViewFilter	Processing filter that makes sure any table filtered by it does not have random access.
SetParameterFilter	Filter which sets a parameter on the table.
SortFilter	Processing filter which sorts on one or more JEL expressions.
SortHeadFilter	Filter for returning the first (or last) few rows of a sorted table.
SortQuantiler	Quantiler that retains all data samples, sorts them when ready, and uses the sorted array to answer questions about quantiles.
StatsFilter	Filter which can calculate statistical quantities.
StepFactory	Factory which can create ProcessingStep objects from strings which represent the filter specifications.
TableStats	Aggregates column statistics for a table.
TailFilter	Filter for picking only the last few rows of a table.
TailTable	Wrapper table implementation which only contains the last N rows of its base table.
TransposeFilter	Processing filter which transposes a table.
UniqueFilter	Filters out rows which are identical in some or all columns.
UnitColumnSupplement	Trivial ColumnSupplement implementation which contains all the columns of a base table unchanged.
UnivariateStats	Calculates univariate statistics for a variable.
ValueInfoMapGroupTable	StarTable implementation built on a MapGroup whose keys are ValueInfo objects representing columns of the table.

Exception Summary

Exception	Description
ArgException	Checked exception thrown when arguments encountered on the command line are illegal.
AssertException	IOException which results from the failure of a user-level assertion.