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package ml;
import java.util.ArrayList;
import structures.ByteBuilder;
public class Matrix {
/*--------------------------------------------------------------*/
/*---------------- Methods ----------------*/
/*--------------------------------------------------------------*/
void initializeRange() {
detectRange();
if(convertTo01) {
convertToZeroOne(outputMidpoint);
}
if(setTargetOutputRangeMin || setTargetOutputRangeMax) {
adjustRange();
}
}
/*--------------------------------------------------------------*/
void detectRange() {
outputMin=Float.MAX_VALUE;
outputMax=-Float.MAX_VALUE;
double sum=0;
long count=0;
for(float[] line : outputs){
for(float f : line){
outputMin=Math.min(f, outputMin);
outputMax=Math.max(f, outputMax);
sum+=f;
count++;
}
}
assert(outputMin<outputMax) : outputMin+", "+outputMax;
outputMean=(float)(sum/count);
outputRange=outputMax-outputMin;
outputMidpoint=outputMin+outputRange*0.5f;
}
void convertToZeroOne(final float cutoff) {
double sum=0;
long count=0;
for(float[] line : outputs){
for(int j=0; j<line.length; j++){
final float f=line[j]<cutoff ? 0 : 1;
line[j]=f;
sum+=f;
}
}
outputMin=0;
outputMax=1;
outputMean=(float)(sum/count);
outputRange=outputMax-outputMin;
outputMidpoint=outputMin+outputRange*0.5f;
}
void adjustRange() {
assert(setTargetOutputRangeMin || setTargetOutputRangeMax) : "Must set minoutput or maxoutput";
assert(outputMin<outputMax) : outputMin+", "+outputMax;
if(!setTargetOutputRangeMin){targetOutputRangeMin=outputMin;}
if(!setTargetOutputRangeMax){targetOutputRangeMax=outputMax;}
if(targetOutputRangeMin==outputMin && targetOutputRangeMax==outputMax) {return;}//Nothing to do
final float range2=targetOutputRangeMax-targetOutputRangeMin;
assert(range2!=outputRange);
final float mult=range2/outputRange;
double sum=0;
long count=0;
for(float[] line : outputs){
for(int i=0; i<line.length; i++){
float f=((line[i]-outputMin)*mult)+targetOutputRangeMin;
line[i]=f;
sum+=f;
count++;
}
}
outputMin=targetOutputRangeMin;
outputMax=targetOutputRangeMax;
outputMean=(float)(sum/count);
outputRange=outputMax-outputMin;
outputMidpoint=outputMin+outputRange*0.5f;
}
/*--------------------------------------------------------------*/
public String toString(){
ByteBuilder bb=new ByteBuilder();
bb.append(columns.toString()).nl();
bb.append("lines="+inputs.length).nl();
bb.append("inputs="+numInputs).nl();
bb.append("outputs="+numOutputs).nl();
bb.append("mean="+outputMean).nl();
bb.append("midpoint="+outputMidpoint).nl();
bb.append("range="+outputRange).nl();
bb.append("inputs="+numInputs).nl();
return bb.toString();
}
int numInputs() {return numInputs;}
int numOutputs() {return numOutputs;}
public float outputMidpoint() {return outputMidpoint;}
/*--------------------------------------------------------------*/
/*---------------- Fields ----------------*/
/*--------------------------------------------------------------*/
ArrayList<String> columns;
int[] dims;
int numInputs;
int numOutputs;
int numPositive=0, numNegative=0;
int validLines=0;
int invalidLines=0;
private float outputMin;
private float outputMax;
private float outputMean;
private float outputMidpoint;
private float outputRange;
float[][][] data;
float inputs[][], outputs[][];
/*--------------------------------------------------------------*/
/*---------------- Static Fields ----------------*/
static boolean convertTo01=false;
static float targetOutputRangeMin=0;
static float targetOutputRangeMax=0;
// static float outputRangeMidpoint=0;
static boolean setTargetOutputRangeMin=false;
static boolean setTargetOutputRangeMax=false;
}
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