I have a 2D array as follows:
long[,] arr = new long[4, 4] {{ 0, 0, 0, 0 },
{ 1, 1, 1, 1 },
{ 0, 0, 0, 0 },
{ 1, 1, 1, 1 }};
I want to print the values of this array in matrix format like:
0 0 0 0
1 1 1 1
0 0 0 0
1 1 1 1
How can I do this?
The two dimensional (2D) array in C programming is also known as matrix. A matrix can be represented as a table of rows and columns.
We know that a two-dimensional array in Java is a single-dimensional array having another single-dimensional array as its elements. We can use the Arrays. toString() method to print string representation of each single-dimensional array in the given two-dimensional array.
You can do it like this (with a slightly modified array to show it works for non-square arrays):
long[,] arr = new long[5, 4] { { 1, 2, 3, 4 }, { 1, 1, 1, 1 }, { 2, 2, 2, 2 }, { 3, 3, 3, 3 }, { 4, 4, 4, 4 } };
int rowLength = arr.GetLength(0);
int colLength = arr.GetLength(1);
for (int i = 0; i < rowLength; i++)
{
for (int j = 0; j < colLength; j++)
{
Console.Write(string.Format("{0} ", arr[i, j]));
}
Console.Write(Environment.NewLine + Environment.NewLine);
}
Console.ReadLine();
like so:
long[,] arr = new long[4, 4] { { 0, 0, 0, 0 }, { 1, 1, 1, 1 }, { 0, 0, 0, 0 }, { 1, 1, 1, 1 } };
var rowCount = arr.GetLength(0);
var colCount = arr.GetLength(1);
for (int row = 0; row < rowCount; row++)
{
for (int col = 0; col < colCount; col++)
Console.Write(String.Format("{0}\t", arr[row,col]));
Console.WriteLine();
}
I wrote extension method
public static string ToMatrixString<T>(this T[,] matrix, string delimiter = "\t")
{
var s = new StringBuilder();
for (var i = 0; i < matrix.GetLength(0); i++)
{
for (var j = 0; j < matrix.GetLength(1); j++)
{
s.Append(matrix[i, j]).Append(delimiter);
}
s.AppendLine();
}
return s.ToString();
}
To use just call the method
results.ToMatrixString();
Here is how to do it in Unity:
(Modified answer from @markmuetz so be sure to upvote his answer)
int[,] rawNodes = new int[,]
{
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0 }
};
private void Start()
{
int rowLength = rawNodes.GetLength(0);
int colLength = rawNodes.GetLength(1);
string arrayString = "";
for (int i = 0; i < rowLength; i++)
{
for (int j = 0; j < colLength; j++)
{
arrayString += string.Format("{0} ", rawNodes[i, j]);
}
arrayString += System.Environment.NewLine + System.Environment.NewLine;
}
Debug.Log(arrayString);
}
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