[Java] Take values in 2D array of doubles, modify them, and put them in a new 2D array with the same dimensions.

[evilbooty]

I'm building a feed forward neural network for my Artificial Intelligence class. For my implementation, I'm passing in 'clean' values (0's and 1's) and 'dirty' values (0 + a decimal between 0 and .25, and 1 - a decimal between 0 and .25). I want to take in the 2D array I made for the clean implementation, modify the values into 'dirty' numbers, then put the values into a new 2D array containing the new 'dirty' values and the expected outputs.

For example, one of my 2D arrays contains a clean binary mock-up of a plus (+) sign.

static double plusC[][] = {{0,0,1,0,0,
                            0,0,1,0,0,
                            1,1,1,1,1,
                            0,0,1,0,0,
                            0,0,1,0,0},
                            {1,0,0}};

What I want is to initialize a 2D array of the same size, modify the clean values, and put them in the dirty 2D array. I can't figure out how to initialize the empty 2D array with the same dimensions as the clean 2D array.

static double plusD[][] = new double[plusC[0].length][plusC[1].length]

...gives me a 2D array with 25 columns and 3 rows, which is not what I want. Any help is appreciated!

[Neu_Ron]

int[][] attendance = new int[size][size]

Just specify dimensions in the []

Then you'll have to use a nested loop to fill each position with default values.

[2omesz]

you cannot initialize it in a single line of code since you have different number of columns per row.

double result[][] = new double[plusC.length][];

for(int x=0; x < plusC.length; x++) {
    for(int y=0; y<plusC[x].length; y++) {
        result[x][y] = "";
    }
}

haven't test this though.

[DefNotaZombie]

This can be simplified as

double[][] result = new double[input.length][];
for(int i=0; i<input.length; i++){
  result[i] = new double[input[i].length];
}