Make the sum of all elements of only one dimension of an array

[ana_carol]

Hi all,

I'm trying to make the sum of all elements of only one
dimension of an array, I created a method to accomplish such a sum, but not know what is happening, by the way I realized that this did not seem to enter into the method. See my code:

import java.io.DataInputStream;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class ReadFile {

       /****************************************************
        * Method created to receive the two 4D arrays
        ****************************************************/
       public static double[][][][] criaMatriz4D(int dim1, int dim2,
int
dim3, int dim4, DataInputStream input) throws IOException{
       double[][][][] matriz = new double[dim1][dim2][dim3][dim4];

       for (int l = 0; l < dim4; l++) {
               for (int k = 0; k < dim3; k++) {
                       for (int j = 0; j < dim2; j++) {
                               for (int i = 0; i < dim1; i++) {
                                       matriz[i][j][k][l] =
input.readDouble();

                               }
                       }
               }
       }
       return matriz;
}

       /****************************************************
       * Method created to receive the two 3D arrays
       ****************************************************/
       public static float[][][] criaMatriz3D(int dim2, int dim3, int
dim4,
DataInputStream input) throws IOException{
       float[][][] matriz = new float[dim2][dim3][dim4];

               for (int k = 0; k < dim4; k++) {
                       for (int j = 0; j < dim3; j++) {
                               for (int i = 0; i < dim2; i++) {
                                       matriz[i][j][k] =
input.readFloat();

                               }
                       }
               }

       return matriz;
}

       /******************************************************
        * Method to realize the sum
        ******************************************************/
        public static double soma(double[][][][] mat_modImag, int
dim1, int
dim2, int dim3, int dim4){
                System.out.println("Here =" );
                  int sum = 0;
                   for(int l = 0; l < dim4; l++){

                       sum += mat_modImag[dim1][dim2][dim3][l];
                       System.out.println("Aqui =");
                   }

                   System.out.println("the sum is =" +sum);
                   return sum;
       }

public static void main(String args[]) throws IOException {

               // Reading the binary file
               DataInputStream input = new DataInputStream(new
FileInputStream(new
File("C:/Documents and Settings/Web/data.dtb")));

               // Reading the dimensions saved in the binary
               int dim1 = 4; // fixed dimension
               int dim2 = input.readInt(); // size read from binary file
               int dim3 = input.readInt(); // size read from binary file
               int dim4 = input.readInt(); // size read from binary file

               
               System.out.println("Dimension1= " +dim1);
               System.out.println("Dimension2= " +dim2);
               System.out.println("Dimension3= " +dim3);
               System.out.println("Dimension4= " +dim4);

               
               double [][][][] mat_modImag = criaMatriz4D(4, dim2, dim3, dim4, input);
               double [][][][] mat_conjImag = criaMatriz4D(4, dim2, dim3, dim4, input);
               float [][][] mat_modScatter = criaMatriz3D(dim2, dim3, dim4, input);
               float [][][] mat_conjScatter = criaMatriz3D(dim2, dim3, dim4, input);

               // Close
               input.close();

               

       }

   // Method to print the matrix
       private static void imprimeMatriz(double[][][][] matriz) {
               System.out.println("----");
               for (int i = 0; i < matriz.length; i++) {
                       for (int j = 0; j < matriz[i].length; j++) {
                               for (int k = 0; k < matriz[i][j].length; k++) {
                                       System.out.print("  ");
                                       for (int l = 0; l < matriz[i][j][k].length; l++) {
                                               //System.out.print(matriz[i][j][k][l] + " ");
                                       }
                                       System.out.println();
                               }
                               System.out.println("--");
                       }
                       System.out.println("----");
               }
       }
}

I do not know what I did wrong. Can you help me??

Thanks,
Ana Carol.

[2by4]

Cut and Paste the error you are getting and

tell us what output you are expecting that is not coming out or is coming out wrong.

[ana_carol]

I inserted a breakpoint inside the method, but the only thing that displays is below:

<terminated>ReadFile [Java Application]
<disconnected>ReadFile at localhost:2138
<terminated, exit value: 0>C:\Arquivos de programas\Java\jre6\bin
\javaw.exe (09/12/2011 13:50:44)


I want to sum all the elements of only one dimension of the array of four dimensions. My array is this: DOUBLE = Array[4, 16, 32, 32].
I want to sum all elements of dimension four, for example.

Thanks,

[2by4]

Put a print statement first thing in your main method.

Do you see the output?

It looks like your output may be going somewhere unexpected.

[ana_carol]

Well.... when i put this line in my main method:

/ / Print the positions of the matrices
System.out.println (mat_modImag [0] [0] [16] [16]);

I can see the result, show me the values the positions.


Thanks,

[Norm]

Can you post what the program prints out?
Add some comments to the print out that explains what is wrong with it
and show what the output should be.

[2by4]

Well.... when i put this line in my main method:

/ / Print the positions of the matrices
System.out.println (mat_modImag [0] [0] [16] [16]);

I can see the result, show me the values the positions.


Thanks,

What if you change it to System.err.println (mat_modImag [0] [0] [16] [16]);

can you still see the output?

[ana_carol]

But this is correct, is printing the value of the position correct.
My problem is in the method in line: public static double soma(double[][][][] mat_modImag, int dim1, int dim2, int dim3, int dim4){ ...

[ana_carol]

It simply prints the values of the locations below, but the result of the sum of all elements of only one dimension of the array does not print and also does not display any error.

What it shows is that by bringing the breakpoint.

I tried to send my binary file to you test my code and see, but the forum does not allow extension .bin

Thanks...

[Norm]

For testing can you manually make a 4 dim array in your code and call the method that you want to test?
If the read the data methods have been tested and are working you can just ignore them for testing the suma method by giving it a 4 dim array that you create in the program.

[ana_carol]

I did this. I created a 4dim array and the test ok, but this my method isn't calculated. I do not know what to do.

[Norm]

but this my method isn't calculated

Please explain and show the input and the output and explain what is wrong with it.

Without the code and the data you are using, no one can help you solve your problem.

[ana_carol]

My code is this:

import java.io.DataInputStream;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
 
public class ReadFile {
 
       /****************************************************
        * Method created to receive the two 4D arrays
        ****************************************************/
       public static double[][][][] criaMatriz4D(int dim1, int dim2, int dim3, int dim4, DataInputStream input) throws IOException{
       double[][][][] matriz = new double[dim1][dim2][dim3][dim4];
 
       for (int l = 0; l < dim4; l++) {
               for (int k = 0; k < dim3; k++) {
                       for (int j = 0; j < dim2; j++) {
                               for (int i = 0; i < dim1; i++) {
                                       matriz[i][j][k][l] =
input.readDouble();
 
                               }
                       }
               }
       }
       return matriz;
}
 
       /****************************************************
       * Method created to receive the two 3D arrays
       ****************************************************/
       public static float[][][] criaMatriz3D(int dim2, int dim3, int
dim4,
DataInputStream input) throws IOException{
       float[][][] matriz = new float[dim2][dim3][dim4];
 
               for (int k = 0; k < dim4; k++) {
                       for (int j = 0; j < dim3; j++) {
                               for (int i = 0; i < dim2; i++) {
                                       matriz[i][j][k] =
input.readFloat();
 
                               }
                       }
               }
 
       return matriz;
}
 
       /******************************************************
        * Method to realize the sum
        ******************************************************/
        public static double soma(double[][][][] mat_modImag, int
dim1, int
dim2, int dim3, int dim4){
                System.out.println("Here =" );
                  int sum = 0;
                   for(int l = 0; l < dim4; l++){
 
                       sum += mat_modImag[dim1][dim2][dim3][l];
                       System.out.println("Aqui =");
                   }
 
                   System.out.println("the sum is =" +sum);
                   return sum;
       }
 
public static void main(String args[]) throws IOException {
 
               // Reading the binary file
               DataInputStream input = new DataInputStream(new
FileInputStream(new
File("C:/Documents and Settings/Web/data.dtb")));
 
               // Reading the dimensions saved in the binary
               int dim1 = 4; // fixed dimension
               int dim2 = input.readInt(); // size read from binary file
               int dim3 = input.readInt(); // size read from binary file
               int dim4 = input.readInt(); // size read from binary file
 
                
               System.out.println("Dimension1= " +dim1);
               System.out.println("Dimension2= " +dim2);
               System.out.println("Dimension3= " +dim3);
               System.out.println("Dimension4= " +dim4);
 
                
               double [][][][] mat_modImag = criaMatriz4D(4, dim2, dim3, dim4, input);
               double [][][][] mat_conjImag = criaMatriz4D(4, dim2, dim3, dim4, input);
               float [][][] mat_modScatter = criaMatriz3D(dim2, dim3, dim4, input);
               float [][][] mat_conjScatter = criaMatriz3D(dim2, dim3, dim4, input);
 
               // Close
               input.close();

               
              //  Print the positions of the matrices
	   System.out.println(mat_modImag[0][0][16][16]); 
	   System.out.println(mat_conjImag[0][0][19][16]);
	   System.out.println(mat_modScatter[1][2][1]);
	   System.out.println(mat_conjScatter[14][16][3]);
 
                
 
       }
 
   // Method to print the matrix
       private static void imprimeMatriz(double[][][][] matriz) {
               System.out.println("----");
               for (int i = 0; i < matriz.length; i++) {
                       for (int j = 0; j < matriz[i].length; j++) {
                               for (int k = 0; k < matriz[i][j].length; k++) {
                                       System.out.print("  ");
                                       for (int l = 0; l < matriz[i][j][k].length; l++) {
                                               //System.out.print(matriz[i][j][k][l] + " ");
                                       }
                                       System.out.println();
                               }
                               System.out.println("--");
                       }
                       System.out.println("----");
               }
       }
}

I want to make the sum of all four elements of the dimension of the matrix criaMatriz4D....in my main method i call: double [][][][] mat_modImag = criaMatriz4D(4, dim2, dim3, dim4, input);

Error:

<terminated>ReadFile [Java Application]
<disconnected>ReadFile at localhost:2138
<terminated, exit value: 0>C:\Arquivos de programas\Java\jre6\bin\javaw.exe (16/12/2011 11:50:44)

[2by4]

See post #7

It will tell us if your errors are going to your terminal or somewhere else -- use System.err.println()

If they are going somewhere else, we need to find where..

[Norm]

<disconnected>ReadFile at localhost:2138

What does that message mean? What does localhost have to do with your program?

For testing can you manually make a 4 dim array in your code and call the method that you want to test?
If the read the data methods have been tested and are working you can just ignore them for testing the soma method by giving it a 4 dim array that you create in the program.

[ana_carol]

I did this:

System.err.println (mat_modImag [0] [0] [16] [16]);
System.out.println(mat_conjImag[0][0][19][16]);
System.out.println(mat_modScatter[1][2][1]);
System.out.println(mat_conjScatter[14][16][3]);

And shows me this:

6.027453177311578E-4
19.0
22.0
7.408909111813356E-4 (this line in "red")

[Norm]

Are those outputs correct?
If not, show what the correct output should be.

You need to provide the input for the methods if you want anyone to test them.
Manually put a 4 dim array into your program so that we can test with the same code and data as you are using.

[ana_carol]

Yes, those outputs is correct. I don't know do this. My problem is in the method sum:

       /******************************************************
        * Method to realize the sum
        ******************************************************/
        public static double sum(double[][][][] mat_modImag, int
dim1, int
dim2, int dim3, int dim4){
                System.out.println("Here =" );
                  int sum = 0;
                   for(int l = 0; l < dim4; l++){
  
                       sum += mat_modImag[dim1][dim2][dim3][l];
                       System.out.println("Aqui =");
                   }
  
                   System.out.println("the sum is =" +sum);
                   return sum;
       }

See:
Here i call the method createMatrix4D and createMatrix3D, but I do not call the method of the sum. I don't know this.

double [][][][] mat_modImag = createMatrix4D(4, dim2, dim3, dim4, input);
double [][][][] mat_conjImag = createMatrix4D(4, dim2, dim3, dim4, input);
float [][][] mat_modScatter = createMatrix3D(dim2, dim3, dim4, input);
float [][][] mat_conjScatter = createMatrix3D(dim2, dim3, dim4, input);

[Norm]

I do not call the method of the sum. I don't know this.

Have you tried to write code to call the sum() method? What happened?
Look at the definition for the sum method. What arguments does it take? What order are the arguments in?
The order of the arguments is different from the other methods.

What does the method return? That is also different from the other methods you have coded.

[ana_carol]

I do not know how to call the method of the sum.
I tried so: double integ_modImag = soma(mat_modImag, dim1, dim2, dim3, dim4);

But returns this error:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 4
at ReadFile.soma(ReadFile.java:60)
at ReadFile.main(ReadFile.java:94) (refers to line: double integ_modImag = soma(mat_modImag, dim1, dim2, dim3, dim4);)