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Service.java
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Service.java
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import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Random;
public class Service {
public Service() {
}
public int[][] readFile(String name) {
int[][] intArray = new int[75][3];
String[] stringArray = new String[3];
String strLine = "";
try {
BufferedReader br = new BufferedReader(new FileReader(name));
int count = 0;
while (strLine != null) {
strLine = br.readLine();
if (strLine == null)
break;
stringArray = strLine.split(",");
for (int i = 0; i < stringArray.length; i++)
intArray[count][i] = Integer.valueOf(stringArray[i]);
count++;
}
br.close();
} catch (IOException e) {
e.printStackTrace();
}
return intArray;
}
public int max(int[] data) {
int max = data[0];
for (int i = 0; i < data.length; i++) {
if (data[i] > max) {
max = data[i];
}
}
return max;
}
public int min(int[] data) {
int min = data[0];
for (int i = 0; i < data.length; i++) {
if (data[i] < min) {
min = data[i];
}
}
return min;
}
public int randomNumberInRange(int min, int max) {
if (min >= max) {
throw new IllegalArgumentException("max must be greater than min");
}
Random random = new Random();
return random.nextInt((max - min) + 1) + min;
}
public int[] minArray(int min, int max, int k) {
int[] minArray = new int[k];
int divider = (max - min) / k;
minArray[0] = min;
for (int i = 1; i <= k - 1; i++) {
minArray[i] = minArray[i - 1] + divider;
}
return minArray;
}
public int[] maxArray(int min, int max, int k) {
int[] maxArray = new int[k];
int divider = (max - min) / k;
maxArray[k - 1] = max;
for (int i = k - 2; i >= 0; i--) {
maxArray[i] = maxArray[i + 1] - divider;
}
return maxArray;
}
public int[] splitColumns(int[][] data, int j) {
int[] result = new int[data.length];
for (int i = 0; i < data.length; i++) {
result[i] = data[i][j];
}
return result;
}
public double[] mean(int[][] data) {
double[] sum = { 0.0, 0.0 };
double[] result = new double[2];
for (int i = 0; i < data.length; i++) {
for (int j = 0; j < data[0].length; j++) {
sum[j] += data[i][j];
}
}
for (int i = 0; i < sum.length; i++) {
result[i] = sum[i] / data.length;
}
return result;
}
// public int[] splitRows(int[][] data) {
// int[] result = new int[data.length];
// for (int i = 0; i < data.length; i++) {
// result[i] = data[i];
// }
// return result;
// }
}