Matrix

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Overview

Matrix is a two-dimensional array of double precision floating point data, i.e. each element in the matrix takes 8 bytes of computer memory. 

A matrix can have a null data, so that a particular element whose value equal to the specified value of nulldata will be omitted in matrix computation, for example calculation of minimum, maximum, or in matrix operation, for e.g. matrix overlay. 

A matrix also has a flag_null, and its value can be 0 (off) or 1 (on).  When flag_null = 0, there is no omission of nulldata.

Member data

Name	Data type	Meaning
nrow	int	number of rows
ncol	int	number of columns
flag_null	bool	a flag indicates whether the null data is omitted in computation(0 = no, 1 = yes)
nulldata	double	value of null data (not application if flag_null = 0)

Operator

See details in operator section.

Construction function

{Matrix} ret  =  MATRIX([{int} argm1, {int} argm2, {double} argm3])

argm1 = no of row        (default = 0)

argm2 = no of column     (default = 0)

argm3 = initial value    (default = 0)

Example:

->A = Matrix()
->print A

no of row    : 0
no of column : 0


->B = Matrix(3,2,10.15)
->print B

no of row    : 3
no of column : 2

0:    10.15000     10.15000
1:    10.15000     10.15000
2:    10.15000     10.15000

->

Lfunction

object({int} argm1, {int} argm2)   =  {double} left-value

argm1 = row index

argm2 = column index     

object.FLAG_NULL()   =  {bool} left-value

object.NULLDATA()    =  {double} left-value

Example:

->B(0,0) = 999
->B

ans =

no of row    : 3
no of column : 2

0:    999.00000    10.15000
1:     10.15000    10.15000
2:     10.15000    10.15000



->B.flag_null()

ans = 0

->B.flag_null() = 1
->B.flag_null()

ans = 1

->B.nulldata()

ans = 0.00000

->B.nulldata() = -90
->B.nulldata()

ans = -90.00000

->

Class function

A-D	E-H	I-L	M-P	Q-S	T-Z
(   )	EDGECANNY	IFT	MATCHING**	R2OPK	TAN
ABS	EDGESOBEL	INIT	MATSTR	RAND	TSP
ACOS	EIGEN	INITBDIAG	MAX	RANK	UCHAR
ADDRIM	EXP	INITDIAG	MEAN	RC2NO	UNIT
ANAGLYPH	FFT	INT	MEDIAN	REASSIGN	VAR
ANGLE	FGAUSS	INV	MIN	RECLASS	VECIDINDX*
ANGPHTIF	FILLPOLY	INVBDIAG	MULT121	RESHAPE	VECIDPT1D*
ASIN	FIND	INVDIAG	MULTDIAG*	REVERSE	VECIDPT2D*
ATAN	FINDALL	KERNELDGAUSS	NCOL	RGB	VECIDPT3D*
BINARY	FINDFROM	KERNELGAUSS	NO2RC	RGBAUTO	VECINDX*
BIT*	FIX	KERNELMEAN	NOCONNECT	ROT180	VECPT2D*
BOOL	FLAG_NULL	LINEFOLLOW	NOCONNECT_EXACT	ROT90L	VECPT3D*
BOUNDARY	FLIPLR	LINGEN	NORM	ROT90R	VECSTR*
BWRGB	FLIPUD	LN	NROW	ROUND	VECTOR
CLEAR	FLOAT	LOAD	NULLDATA	RREF	VLOAD
CLOSE	FLOOD	LOADASC	PERCENTILE	RX	WINDOW
COMPLEX	FMEAN	LOADBIN	POLYLINE	RXYZ
COMPMAX	FMEDIAN	LOADBIN1	PRODCOL	RY
COMPMIN	FMODE***	LOADBIN_OFFSET	PRODROW	RZ
CONCAT	GETASC**	LOADBMP	PYRAMID	SAPPASC
CONCATDOWN	GETBIN2**	LOADCSV	QFIND	SAPPBIN
CONVOL	GETBIN4**	LOADTIF		SAVE
CORR	GETBIN4F**	LOADTIF16****		SAVEASC
COS	GETBIN8**	LOADTIF32*****		SAVEASCXYZ
COV	GETCOL	LOADTIF64*		SAVEBIN
CROSS	GETROW	LOG		SAVEBMP
DET	GOGET	LOOKUP***		SAVECSV
DIAGMULT*	GOSET	LU		SAVETIF
DOT	GOSETMAT			SAVEWRL
DOUBLE	HISTMATCH***			SD
DRWBREAKLINE*****	HISTO			SET
DRWCIRCLE				SETBDIAG
DRWELLIPSE				SETCOL
DRWLINE				SETDIAG
DRWPLINE				SETROW
DRWRECTANG				SETSYMB
DRWSQUARE				SETVECSYMB**
DRWVECCIRCLE**				SETWINDOW
DRWVECPLINE				SHORT
DRWTEXT**				SIN
				SIZE
				SKIP
				SORT
				SORTALL
				STRETCH
				STRETCHEQ**
				STRETCHFIX
				STRETCHSAT
				STRING**
				SUM
				SWAPCOL
				SWAPROW

*    for class MATRIX only

**   for class MATRIX_UCH only

***  for class MATRIX_INT  MATRIX_SHT  and  MATRIX_UCH only

****  for class MATRIX MATRIX_FLT MATRIX_INT  and MATRIX_SHT only

*****  for class MATRIX and MATRIX_FLT only

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