public Vector getColumn(int index) {
validateRowIndex(index);
Vector column = new Vector(rows.length);
for (int i = 0; i < rows.length; ++i) {
column.setValue(i, rows[i].getValue(index));
}
return column;
}
public Matrix(Vector[] vector) {
List<Vector> vectorList = new ArrayList<>(Arrays.asList(vector));
Vector max = Collections.max(vectorList, new LengthComparator());
int maxLength = max.getSize();
this.rows = new Vector[vector.length];
for (int i = 0; i < vector.length; ++i) {
rows[i] = new Vector(maxLength);
rows[i].sum(vector[i]);
}
}
public String toString() {
StringBuilder string = new StringBuilder();
string.append("{");
for (Vector e : this.rows) {
string.append(e.toString()).append(",");
}
string.delete(string.length() - 1, string.length());
string.append("}");
return string.toString();
}
public void setRow(int index, Vector vector) {
validateColumnIndex(index);
if (isInsideRow(vector.getSize())) {
for (int i = 0; i < rows.length; ++i) {
Vector tmp = new Vector(rows[i]);
this.rows[i] = new Vector(vector.getSize());
this.rows[i].sum(tmp);
}
}
for (int i = 0; i < vector.getLength(); ++i) {
rows[index].setValue(i, vector.getValue(i));
}
}
public Vector multiplicationOnVector(Vector vector) {
try {
if (vector.getSize() != rows[0].getSize()) {
throw new Exception("Длинна вектора не совпадает с колличеством столбцов в матрице");
}
} catch (Exception e) {
e.printStackTrace();
}
Vector resultVector = new Vector(vector.getSize());
for (int i = 0; i < rows.length; ++i) {
double result = 0;
for (int j = 0; j < rows[i].getSize(); ++j) {
result += rows[i].getValue(j) * vector.getValue(j);
}
resultVector.setValue(i, result);
}
return resultVector;
}