From jagged Array to 2D array

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I have this function made with jagged array, but I need it to be in 2D array so I can use it in my application.

C#

public static double[][] InvertMatrix(double[][] A)
{
    int n = A.Length;
    //e will represent each column in the identity matrix
    double[] e;
    //x will hold the inverse matrix to be returned
    double[][] x = new double[n][];
    for (int i = 0; i < n; i++)
    {
        x[i] = new double[A[i].Length];
    }

I just need to convert

C#

x[i] = new double[A[i].Length];

to a 2D array. How can I do that?

Posted 9-Oct-14 17:58pm

Wael Tayara

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Comments

Sergey Alexandrovich Kryukov 10-Oct-14 0:13am

Do you mean to have a double[,] array? Is it supposed to be n*n? But what's the problem?
—SA

Wael Tayara 10-Oct-14 0:16am

I'm trying to convert the whole function from Jagged array into 2D array..

Sergey Alexandrovich Kryukov 10-Oct-14 0:32am

All right, but you did not answer any of my questions. What have you tried so far?
—SA

Wael Tayara 10-Oct-14 0:35am

I converted everything except for the line I have posted, I don't this that I would need to initialize a new array on each iteration ... ?!

Sergey Alexandrovich Kryukov 10-Oct-14 1:30am

It all makes no sense. Your declaration is x[][]. It cannot be indexed as x[i]. There is no "convert". You need to create and object of the type double[,] (what else could be considered as "2D array"? only double[][] or double [,]), and populate one array using the data from another one.
—SA

Sinisa Hajnal 10-Oct-14 2:41am

What you actually want is the code to change x[i] into x[i][j], right? The answer is, no you don't have to initialize it in each iteration, you don't have to initialize it at all. While it is good idea to do explicit 0 initialization, it is not required.

If you really want to do it, then find the max length of your A[i].lengths and use that as length for all x[i]...except you cannot access x[][] as x[i], can you?

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