public class MathTable extends Object
| Modifier and Type | Class and Description |
|---|---|
class |
MathTable.Row
A row is indexed by a number and contains multiple values.
|
| Constructor and Description |
|---|
MathTable(int nColumns)
Constructs an empty table.
|
MathTable(String... headers)
Constructs an empty table by headers.
|
| Modifier and Type | Method and Description |
|---|---|
void |
addRow(double index,
double[] values)
Adds a row to the table.
|
void |
addRows(double[][] data)
Adds rows by a
double[][]. |
double |
get(double i,
int j)
Gets a particular table entry at [i,j].
|
double |
get(double i,
String header)
Gets a particular table entry at [i, "header"].
|
String[] |
getHeaders()
Gets the column names.
|
double[] |
getIndices()
Gets a copy of the row indices.
|
MathTable.Row |
getRowOnOrAfter(double i)
Gets the row corresponding to a row index.
|
MathTable.Row |
getRowOnOrBefore(double i)
Gets the row corresponding to a row index.
|
Iterator<MathTable.Row> |
getRowsOnOrAfter(double i)
Gets the rows having the row index value equal to or just bigger than
i. |
Iterator<MathTable.Row> |
getRowsOnOrBefore(double i)
Gets the rows having the row index value equal to or just smaller than
i. |
int |
nColumns()
Gets the number of columns in the table.
|
public MathTable(String... headers)
headers - the column names; they must be uniquepublic MathTable(int nColumns)
nColumns - the number of columnspublic String[] getHeaders()
public int nColumns()
public void addRow(double index,
double[] values)
index - the row indexvalues - the row valuespublic void addRows(double[][] data)
double[][].
The first number in each row/double[] is the row index.
For example,
new double[][]{
{1.0, 1.1, 1.2, 1.3},
{2.0, 2.1, 2.2, 2.3},
{3.0, 3.1, 3.2, 3.3},
{4.0, 4.1, 4.2, 4.3}
};
represents
1.0: {1.1, 1.2, 1.3}//row 1
2.0: {2.1, 2.2, 2.3}//row 2
3.0: {3.1, 3.2, 3.3}//row 3
4.0: {4.1, 4.2, 4.3}//row 4
data - a double[][] of table entries.public double[] getIndices()
public MathTable.Row getRowOnOrBefore(double i)
i - a row indexNoSuchElementException - if i is smaller than the first row indexpublic MathTable.Row getRowOnOrAfter(double i)
i - a row indexNoSuchElementException - if i is bigger than the last row index valuepublic Iterator<MathTable.Row> getRowsOnOrBefore(double i)
i.
The returned Iterator allows iterating the rows in reversed order starting from the
matching row.i - the row indexIterator of Rows at or above the matching rowpublic Iterator<MathTable.Row> getRowsOnOrAfter(double i)
i.
The returned Iterator allows iterating the rows starting from the matching row.i - the row indexIterator of Rows at or below the matching rowpublic double get(double i,
int j)
i, by default, we use linear interpolation between the
row above and below. If i is smaller than the first row index, we return the value at
[1,j]. A subclass may override this behavior to customize interpolation.i - a row indexj - a column index, counting from 1NoSuchElementException - if rowValue is outside the table rangepublic double get(double i,
String header)
i, by default, we use linear interpolation between the
row above and below. If i is smaller than the first row index, we return the value at
[1,"header"]. A subclass may override this behavior to customize interpolation.i - a row value indexheader - the column nameNoSuchElementException - if i is outside the table rangeCopyright © 2010-2020 NM FinTech Ltd.. All Rights Reserved.