Tanguy

merge request de tanguy vers master

src/main/java/ch/hepia/numeric/Vector.java

 package ch.hepia.numeric;
 
 import java.util.List;
+import java.util.ArrayList;
 import java.util.function.DoubleFunction;
 import java.util.function.Function;
 
 final public class Vector {
-    private Vector() {}
+
+    final private List<Double> lstVector;// = new ArrayList<Double>();
+
+    private Vector() {
+      this.lstVector=new ArrayList<Double>();
+    }
+
     private Vector(Double... elements) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      this.lstVector=new ArrayList<Double>();
+      for(double e:elements)
+      {
+        lstVector.add(e);
+      }
     }
+
     private Vector(List<Double> elements) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      this.lstVector=elements;
     }
 
     public Transposed t() {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        return new Transposed(this);
     }
 
     public int len() {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        return this.lstVector.size();
     }
 
     public double get(int i) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      return this.lstVector.get(i);
     }
     void set(int i, double value) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        this.lstVector.set(i,value);
     }
 
     public Vector add(Vector that) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        Vector v = new Vector();
+        for(int i=0;i<this.len();i++)
+        {
+          v.lstVector.add(Double.sum(this.get(i),that.get(i)));
+        }
+        return v;
     }
 
     public Vector mul(double m) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        Vector v = new Vector();
+        for(double e:this.lstVector)
+        {
+          v.lstVector.add(e*m);
+        }
+        return v;
     }
 
     public Vector sub(Vector that) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      Vector v = new Vector();
+      for(int i=0;i<this.len();i++)
+      {
+        v.lstVector.add(this.get(i)-that.get(i));
+      }
+      return v;
     }
 
     public double norm() {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        double power=0;
+        for(double e:this.lstVector)
+        {
+          power+=(e*e);
+        }
+        return Math.sqrt(power);
     }
 
     public Vector sliceFrom(int i) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        return slice (i,this.len());
     }
 
     public Vector sliceTo(int i) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        return slice (0,i);
     }
 
     public Vector slice(int from, int to) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
-    }
-
-    public Vector removed(int i) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
-    }
-
-    public Vector concat(Vector that) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
-    }
-
-    public Vector map(DoubleFunction<Double> f) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
-    }
-
-    public Vector copy() {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        Vector v =new Vector();
+        if (from>=to){
+          return v;
+        }
+        else
+        {
+          for (double d : this.lstVector.subList(from,to))
+          {
+            v.lstVector.add(d);
+          }
+          return v;
+        }
+    }
+
+    public Vector removed(int i)
+    {
+      Vector v = this.copy();
+      v.lstVector.remove(i);
+      return v;
+    }
+
+    public Vector concat(Vector that)
+    {
+      Vector v = Vector.zeros(this.len()+that.len());
+      for(int i=0;i<v.len();i++)
+      {
+        if(i<this.len())
+        {
+          v.set(i,this.get(i));
+        }
+        else
+        {
+          v.set(i,that.get(i-this.len()));
+        }
+      }
+      return v;
+    }
+
+    public Vector map(DoubleFunction<Double> f) {//ne pas faire
+        throw new UnsupportedOperationException("This feature isn't implemented yet");
+    }
+
+    public Vector copy()
+    {
+      Vector v = Vector.zeros(this.len());
+      for(int i=0;i<v.len();i++)
+      {
+        v.set(i,this.get(i));
+      }
+      return v;
     }
 
     void checkVectorLengthOrThrow(Vector that){
@@ -77,53 +142,97 @@ final public class Vector {
     }
 
     public static Vector of(Double... elements) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+       return new Vector(elements);
     }
 
     public static Vector of(List<Double> elements) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+       return new Vector(elements);
     }
 
     public static Vector empty() {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      return new Vector();
     }
 
     public static Vector fill(int nb, double value) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        Vector v = new Vector();
+        for(int i = 0; i < nb; i++)
+        {
+          v.lstVector.add(value);
+        }
+        return v;
     }
 
     public static Vector zeros(int nb) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+        return Vector.fill(nb,0.0);
     }
 
     public static Vector ones(int nb) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      return Vector.fill(nb,1.0);
     }
 
-    public static Vector linespace(double from, double to, int nb) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+    public static Vector linespace(double from, double to, int nb)
+    {
+      double step=(to-from)/(nb-1);
+      Vector v = Vector.zeros(nb);
+      for(int i=0;i<nb;i++)
+      {
+          v.set(i,from+(step*i));
+      }
+      return v;
     }
 
-    public static Vector tabulate(int nb, Function<Integer, Double> f) {
+    //ne pas faire
+    public static Vector tabulate(int nb, Function<Integer, Double> f)
+    {
         throw new UnsupportedOperationException("This feature isn't implemented yet");
     }
 
-    public static Vector sum(List<Vector> vs) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+    public static Vector sum(List<Vector> vs)
+    {
+      int length=vs.get(0).len();
+      Vector v = Vector.zeros(length);
+      for(int e=0;e<length;e++)
+      {
+        for(Vector vLst:vs)
+        {
+          v.set(e,Double.sum(v.get(e),vLst.get(e)));
+        }
+      }
+      return v;
     }
 
     public static double norms(List<Vector> vs) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      return sum(vs).norm();
     }
 
 
     @Override
     public String toString() {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      List<String> strings = new ArrayList<String>();
+      for (Double d : this.lstVector) {
+          // Apply formatting to the string if necessary
+          strings.add(d.toString());
+      }
+      return "Vector"+String.valueOf(strings);
     }
 
+
     @Override
     public boolean equals(Object obj) {
-        throw new UnsupportedOperationException("This feature isn't implemented yet");
+      if(obj instanceof Vector)
+      {
+        for(int i=0;i<this.len();i++)
+        {
+          if(((Vector)obj).get(i)!=this.get(i))
+          {
+            return false;
+          }
+        }
+        return true;
+      }
+      else
+      {
+        return false;
+      }
     }
 }