org.das2.dataset

Class TableUtil

java.lang.Object

org.das2.dataset.TableUtil

public class TableUtil
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
TableUtil()

Method Summary

Modifier and Type	Method and Description
protected static void	checkForNaN(double[][] t)
static void	checkForNaN(TableDataSet tds)
static Datum	closestDatum(TableDataSet table, Datum x, Datum y)
static int	closestRow(TableDataSet table, int itable, Datum datum)
static int	closestRow(TableDataSet table, int itable, double x, Units units)
static VectorDataSet	collapse(TableDataSet ds, int offset, int length)
static void	dumpToAsciiStream(TableDataSet tds, Datum xmin, Datum xmax, java.io.OutputStream out)
static void	dumpToAsciiStream(TableDataSet tds, java.io.OutputStream out)
static void	dumpToAsciiStream(TableDataSet tds, java.nio.channels.WritableByteChannel out)
static void	dumpToBinaryStream(TableDataSet tds, java.io.OutputStream out)
static void	dumpToDas2Stream(QDataSet tds, java.nio.channels.WritableByteChannel out, boolean asciiTransferTypes, boolean sendStreamDescriptor) Write das2stream directly from QDataSet.
static void	dumpToDas2Stream(TableDataSet tds, java.nio.channels.WritableByteChannel out, boolean asciiTransferTypes, boolean sendStreamDescriptor) write the data to a das2Stream
static DatumVector	getDatumVector(TableDataSet tds, int i)
static Datum	getLargestYTag(TableDataSet tds)
static int	getNextRow(TableDataSet ds, int itable, Datum datum) return the first row after the datum.
static int	getPreviousRow(TableDataSet ds, int itable, Datum datum) return the first row before the datum.
static Datum	getSmallestYTag(TableDataSet tds)
static double[]	getYTagArrayDouble(TableDataSet table, int itable, Units units)
static DatumVector	getYTagsDatumVector(TableDataSet tds, int itable)
static Datum	guessYTagWidth(TableDataSet table)
static Datum	guessYTagWidth(TableDataSet table, int itable) guess the y tag cadence by returning the difference of the first two tags.
static int	tableIndexAt(TableDataSet table, int i)
static double	tableMax(TableDataSet tds, Units units)
static java.lang.String	toString(TableDataSet tds)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TableUtil

public TableUtil()

Method Detail

getYTagArrayDouble

public static double[] getYTagArrayDouble(TableDataSet table,
                                          int itable,
                                          Units units)

getLargestYTag

public static Datum getLargestYTag(TableDataSet tds)

getSmallestYTag

public static Datum getSmallestYTag(TableDataSet tds)

closestRow

public static int closestRow(TableDataSet table,
                             int itable,
                             Datum datum)

closestRow

public static int closestRow(TableDataSet table,
                             int itable,
                             double x,
                             Units units)

closestDatum

public static Datum closestDatum(TableDataSet table,
                                 Datum x,
                                 Datum y)

tableIndexAt

public static int tableIndexAt(TableDataSet table,
                               int i)

guessYTagWidth

public static Datum guessYTagWidth(TableDataSet table)

guessYTagWidth

public static Datum guessYTagWidth(TableDataSet table,
                                   int itable)

guess the y tag cadence by returning the difference of the first two tags. If the tags appear to be log spaced, then a ratiometric unit (e.g. percentIncrease) is returned. monotonically decreasing is handled, in which case a positive tag cadence is returned.

Parameters:

table -

itable - the table index.

Returns:

the nominal cadence of the tags.

tableMax

public static double tableMax(TableDataSet tds,
                              Units units)

checkForNaN

public static void checkForNaN(TableDataSet tds)

checkForNaN

protected static void checkForNaN(double[][] t)

toString

public static java.lang.String toString(TableDataSet tds)

getDatumVector

public static DatumVector getDatumVector(TableDataSet tds,
                                         int i)

getYTagsDatumVector

public static DatumVector getYTagsDatumVector(TableDataSet tds,
                                              int itable)

dumpToAsciiStream

public static void dumpToAsciiStream(TableDataSet tds,
                                     Datum xmin,
                                     Datum xmax,
                                     java.io.OutputStream out)

dumpToAsciiStream

public static void dumpToAsciiStream(TableDataSet tds,
                                     java.io.OutputStream out)

dumpToAsciiStream

public static void dumpToAsciiStream(TableDataSet tds,
                                     java.nio.channels.WritableByteChannel out)

dumpToBinaryStream

public static void dumpToBinaryStream(TableDataSet tds,
                                      java.io.OutputStream out)

dumpToDas2Stream

public static void dumpToDas2Stream(QDataSet tds,
                                    java.nio.channels.WritableByteChannel out,
                                    boolean asciiTransferTypes,
                                    boolean sendStreamDescriptor)

Write das2stream directly from QDataSet.

Parameters:

tds - rank 2 table or rank 3 join of tables.

out - output channel which will receive the stream.

asciiTransferTypes - if true then use ascii to transfer data.

sendStreamDescriptor - if true send the stream header, if false don't output it.

dumpToDas2Stream

public static void dumpToDas2Stream(TableDataSet tds,
                                    java.nio.channels.WritableByteChannel out,
                                    boolean asciiTransferTypes,
                                    boolean sendStreamDescriptor)

write the data to a das2Stream

Parameters:

tds -

out -

asciiTransferTypes -

sendStreamDescriptor - if false, then don't send the stream and don't close.

getPreviousRow

public static int getPreviousRow(TableDataSet ds,
                                 int itable,
                                 Datum datum)

return the first row before the datum. Handles mono decreasing.

Returns:

the row which is less than or equal to the datum

getNextRow

public static int getNextRow(TableDataSet ds,
                             int itable,
                             Datum datum)

return the first row after the datum. Handles mono decreasing.

Returns:

the row which is greater than or equal to the datum

collapse

public static VectorDataSet collapse(TableDataSet ds,
                                     int offset,
                                     int length)