CODEWITHSUNDEEP
c#arrays
Tomas Smilgius
Tomas Smilgius

Reputation: 13

C#. How to transform 1D array to 2D array

I know this has been asked numerous times before, but I could not find what specifically I 'm looking for. I'm currently trying to write c# method that displays int array as vertical bars on console. My idea is to transform 1D array into 2D. if input = {2, 1, 3}; Output should look like: 

{{0, 0, 1},
 {1, 0, 1},
 {1, 1, 1}}

Then I could replace 1 and 0 by character of my choice to display the image on the console. So far my method looks like this:

    public static void DrawGraph()
    {
         int[] randomArray = new int[3]{ 2, 1, 3 };
         int[,] graphMap = new int[3, 3];

             for(int i = 0; i < graphMap.GetLength(0); i++)
             {
                for(int j = 0; j < graphMap.GetLength(1); j++)
                {
                    graphMap[i, j] = randomArray[j];
                    Console.Write(graphMap[i, j]);
                }
                Console.WriteLine();
             }
    }

And it produces output: 

2 1 3
2 1 3
2 1 3

Upvotes: 1

Views: 1124

Answers (2)

RedLaser
RedLaser

Reputation: 680

Here is a better function than the one given already,

static void DrawGraph(int[] array)
{
    int maxElementValue = 0;
    foreach (int i in array)
    {
        if (i > maxElementValue) maxElementValue = i;
    }

    for (int rowIndex= 0; rowIndex < maxElementValue; ++rowIndex)
    {
        foreach (int i in array)
        {
            Console.Write((i < rowIndex - columnIndex ? 0 : 1) + " ");
        }

        Console.WriteLine();
    }
}

It works as desired.

Upvotes: 0

cbr
cbr

Reputation: 13662

If the 2D array is only relevant as a tool to help you print, you can leave it out completely.

private static readonly char GraphBackgroundChar = '0';
private static readonly char GraphBarChar = '1';

void Main()
{
    int[] input = {4, 1, 6, 2};
    int graphHeight = input.Max(); // using System.Linq;

    for (int currentHeight = graphHeight - 1; currentHeight >= 0; currentHeight--)
    {
        OutputLayer(input, currentHeight);
    }
}

private static void OutputLayer(int[] input, int currentLevel)
{
    foreach (int value in input)
    {
        // We're currently printing the vertical level `currentLevel`.
        // Is this value's bar high enough to be shown on this height?
        char c = currentLevel >= value
            ? GraphBackgroundChar
            : GraphBarChar;
        Console.Write(c);
    }
    Console.WriteLine();
}

What this basically does is it finds the "highest bar" from the input, then loops through each vertical level top-to-bottom, printing GraphBarChar each time a graph bar in input is visible at the current height.

Some samples:

input = {2, 1, 3};

001
101
111

input = {2, 4, 1, 0, 3};

01000
01001
11001
11101

If your targeted platforms support box-drawing characters in the terminal emulators, you could use the following characters for some pretty convincing bar graphs:

private static readonly char GraphBackgroundChar = '░';
private static readonly char GraphBarChar = '█';

input = {2, 1, 3};

░░█
█░█
███

input = {2, 4, 1, 0, 3};

░█░░░
░█░░█
██░░█
███░█

Upvotes: 5

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