edu.iastate.metnet.analysis
Class MySolver

java.lang.Object
  edu.iastate.metnet.analysis.MySolver

public class MySolver
extends java.lang.Object

linear equation solver
this class solve the problem AX = B in which A, X, B are matrices A and B are type of java.util.List

Author:

Jie Li

Field Summary

(package private) static org.apache.log4j.Logger	logger log4j faqcility
(package private) static MySolver	solver singleton pattern

Method Summary

java.lang.String	constructMatrix(float[][] fs) for a matrix, construct the string like "[1 3 5; 2 5 1; 2 3 8]"; notice that the parser of the scipy is very picky and we must follow the format without additional blank or semicolon
java.lang.String	constructMatrix(java.util.List list) for a matrix, construct the string like "[1 3 5; 2 5 1; 2 3 8]"; notice that the parser of the scipy is very picky and we must follow the format without additional blank or semicolon
java.lang.String	constructRowVector(java.util.List list) cnstruct the representation of one row of the matrix
java.lang.String	constructVector(float[] fs) for a vector, construct the string like "[10;8;3]";
java.lang.String	constructVector(java.util.List list) for a vector, construct the string like "[10;8;3]";
static MySolver	getInstance()
boolean	isCompatible(float[][] a, float[] b) check if the a and b has compatible dimension since a is a squar matrix, a.length == b.length and each line of a should has same length
boolean	isCompatible(java.util.List a, java.util.List b) check if the a and b has compatible dimension since a is a squar matrix, a.length == b.length and each line of a should has same length
float[]	solve(float[][] a, float[] b)
java.util.List	solve(java.util.List a, java.util.List b) solve the linear equation
java.util.List	toFloatList(float[] fs)
java.util.List	toFloatList(float[][] fs)

Methods inherited from class java.lang.Object

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

Field Detail

logger

static org.apache.log4j.Logger logger

log4j faqcility

solver

static MySolver solver

singleton pattern

Method Detail

getInstance

public static MySolver getInstance()

solve

public java.util.List solve(java.util.List a,
                            java.util.List b)

solve the linear equation

Parameters:

a - the matrix

b - the vector

Returns:

the result vector

solve

public float[] solve(float[][] a,
                     float[] b)

constructVector

public java.lang.String constructVector(java.util.List list)

for a vector, construct the string like "[10;8;3]";

Parameters:

list - the vector

Returns:

the string representation of the vector

constructVector

public java.lang.String constructVector(float[] fs)

for a vector, construct the string like "[10;8;3]";

Parameters:

fs - the vector

Returns:

the string representation of the vector

constructRowVector

public java.lang.String constructRowVector(java.util.List list)

cnstruct the representation of one row of the matrix

Parameters:

list - the row of the matrix

Returns:

the string representation of that row

constructMatrix

public java.lang.String constructMatrix(java.util.List list)

for a matrix, construct the string like "[1 3 5; 2 5 1; 2 3 8]"; notice that the parser of the scipy is very picky and we must follow the format without additional blank or semicolon

Parameters:

list - the matrix

Returns:

the string representation of the matrix

toFloatList

public java.util.List toFloatList(float[] fs)

toFloatList

public java.util.List toFloatList(float[][] fs)

constructMatrix

public java.lang.String constructMatrix(float[][] fs)

for a matrix, construct the string like "[1 3 5; 2 5 1; 2 3 8]"; notice that the parser of the scipy is very picky and we must follow the format without additional blank or semicolon

Parameters:

fs - the matrix

Returns:

the string representation of the matrix

isCompatible

public boolean isCompatible(java.util.List a,
                            java.util.List b)

check if the a and b has compatible dimension since a is a squar matrix, a.length == b.length and each line of a should has same length

Parameters:

a - the matrix or list of list

b - the vector

Returns:

true if compatible, false if not

isCompatible

public boolean isCompatible(float[][] a,
                            float[] b)

check if the a and b has compatible dimension since a is a squar matrix, a.length == b.length and each line of a should has same length

Parameters:

a - the matrix or list of list

b - the vector

Returns:

true if compatible, false if not