org.jzy3d.maths
Class Utils

java.lang.Object
  org.jzy3d.maths.Utils

public class Utils
extends java.lang.Object

Constructor Summary

Utils()

Method Summary

static double[]	abs(double[] values) Computes the absolute values of an array of doubles.
static java.lang.String	blanks(int length)
static long	dat2num(java.util.Date date)
static java.lang.String	dat2str(java.util.Date date) Convert a date to the format "dd/MM/yyyy HH:mm:ss".
static java.lang.String	dat2str(java.util.Date date, java.lang.String format) Some example format dd.MM.yy 09.04.98 yyyy.MM.dd G 'at' hh:mm:ss z 1998.04.09 AD at 06:15:55 PDT EEE, MMM d, ''yy Thu, Apr 9, '98 h:mm a 6:15 PM H:mm 18:15 H:mm:ss:SSS 18:15:55:624 K:mm a,z 6:15 PM,PDT yyyy.MMMMM.dd GGG hh:mm aaa 1998.April.09 AD 06:15 PM
static java.util.Date	max(java.util.Date[] dates) Return the maximal date of an array
static java.util.Date	min(java.util.Date[] dates) Return the minimal date of an array
static java.util.Date	num2dat(long value)
static java.lang.String	num2str(char parseMode, double num) Same as num2str(char parseMode, double num, int precision) but does not query precision.
static java.lang.String	num2str(char parseMode, double num, int precision) Convert a number into a string, with precision number of meaningfull digits.
static java.lang.String	num2str(double num) Convert a number into a string.
static java.lang.String	num2str(double num, int precision)
static double	sum(double[] values) Computes the sum of an array of doubles.
static int	sum(int[] values) Computes the sum of an array of doubles.
static double[]	vector(double min, double max) Generate a vector containing regular increasing values from min to max, with an offset 1.
static double[]	vector(double min, double max, int nstep) Generate a vector containing regular increasing values from min to max, with an offset of nstep.
static int[]	vector(int min, int max) Generate a vector containing regular increasing values from min to max, with an offset 1.
static int[]	vector(int min, int max, int nstep) Generate a vector containing regular increasing values from min to max, with an offset of nstep.

Methods inherited from class java.lang.Object

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

Constructor Detail

Utils

public Utils()

Method Detail

num2str

public static java.lang.String num2str(char parseMode,
                                       double num,
                                       int precision)

Convert a number into a string, with precision number of meaningfull digits. 'd' integral The result is formatted as a decimal integer 'o' integral The result is formatted as an octal integer 'x', 'X' integral The result is formatted as a hexadecimal integer 'e', 'E' floating point The result is formatted as a decimal number in computerized scientific notation 'f' floating point The result is formatted as a decimal number 'g', 'G' floating point The result is formatted using computerized scientific notation or decimal format, depending on the precision and the value after rounding.

See Also:

http://java.sun.com/j2se/1.5.0/docs/api/java/util/Formatter.html#syntax, String.format

num2str

public static java.lang.String num2str(char parseMode,
                                       double num)

Same as num2str(char parseMode, double num, int precision) but does not query precision.

num2str

public static java.lang.String num2str(double num,
                                       int precision)

num2str

public static java.lang.String num2str(double num)

Convert a number into a string.

dat2str

public static java.lang.String dat2str(java.util.Date date)

Convert a date to the format "dd/MM/yyyy HH:mm:ss".

dat2str

public static java.lang.String dat2str(java.util.Date date,
                                       java.lang.String format)

Some example format dd.MM.yy 09.04.98 yyyy.MM.dd G 'at' hh:mm:ss z 1998.04.09 AD at 06:15:55 PDT EEE, MMM d, ''yy Thu, Apr 9, '98 h:mm a 6:15 PM H:mm 18:15 H:mm:ss:SSS 18:15:55:624 K:mm a,z 6:15 PM,PDT yyyy.MMMMM.dd GGG hh:mm aaa 1998.April.09 AD 06:15 PM

Parameters:

date -

format -

Returns:

See Also:

http://java.sun.com/docs/books/tutorial/i18n/format/simpleDateFormat.html

dat2num

public static long dat2num(java.util.Date date)

num2dat

public static java.util.Date num2dat(long value)

blanks

public static java.lang.String blanks(int length)

abs

public static double[] abs(double[] values)

Computes the absolute values of an array of doubles.

Parameters:

values -

Returns:

the sum of input values

sum

public static double sum(double[] values)

Computes the sum of an array of doubles. NaN values are ignored during the computation.

Parameters:

values -

Returns:

the sum of input values

sum

public static int sum(int[] values)

Computes the sum of an array of doubles. NaN values are ignored during the computation.

Parameters:

values -

Returns:

the sum of input values

vector

public static double[] vector(double min,
                              double max,
                              int nstep)

Generate a vector containing regular increasing values from min to max, with an offset of nstep.

Parameters:

min -

max -

nstep -

Returns:

vector

public static double[] vector(double min,
                              double max)

Generate a vector containing regular increasing values from min to max, with an offset 1.

Parameters:

min -

max -

Returns:

vector

public static int[] vector(int min,
                           int max,
                           int nstep)

Generate a vector containing regular increasing values from min to max, with an offset of nstep.

Parameters:

min -

max -

nstep -

Returns:

vector

public static int[] vector(int min,
                           int max)

Generate a vector containing regular increasing values from min to max, with an offset 1.

Parameters:

min -

max -

Returns:

min

public static java.util.Date min(java.util.Date[] dates)

Return the minimal date of an array

Parameters:

dates -

Returns:

max

public static java.util.Date max(java.util.Date[] dates)

Return the maximal date of an array

Parameters:

dates -

Returns: