Question

有人可以帮助我将2d数组转换为1d数组吗？ 2d数组随机编译。我也是C＃的新手，是的，我为我的英语感到抱歉）谢谢！

 Random rnd = new Random();
        int[,] lala = new int[5, 6];
        for (int i = 0; i < 5; i++)
        {
            for (int j = 0; j < 6; j++)
            {
                lala[i, j] = rnd.Next(1, 10);
                Console.Write(lala[i, j] + " ");
            }
            Console.WriteLine();

        }
        Console.ReadKey();
        int i, j;
        int[] b = new int[30];
        int k = 0;
        for (i = 0; i < 5; i++)
        {
            for (j = 0; j < 6; j++)
            {
                b[k++] = lala[i, j];
            }
        }

        for (i = 0; i < 5 * 6; i++)
        {
            Console.WriteLine(b[i] + " ");
        }
        Console.ReadKey();

Answer 1

如果您只想以某种方式将2D数组的值放入1D中，这是一种方法

int upper1 = 5;
int upper2 = 6;
int[,] twoD = new int[upper1, upper2];
// fill array

int[] oneD = new int[upper1 * upper2];
int idx = -1;
for (int i = 0; i < upper1; i++)
{
    for (int j = 0; j < upper2; j++)
    {
        oneD[++idx] = twoD[i,j]; 
    }
}

Answer 2

Output audio: 2048 samples, audioFreq: 44100, audioFs: 50000.0
Fetching 98304 IQ samples from SDR #0

...

Fetching 98304 IQ samples from SDR #0
decRate: 12, newFs : 200000.0, dec_audio: 4
Output audio: 2048 samples, audioFreq: 44100, audioFs: 50000.0
Fetching 98304 IQ samples from SDR #0
[  627.05045796  1835.36815837  3381.16496121 ...   401.43836645
 -1156.07050642 -1291.0900775 ]
float64
From cffi callback <function _StreamBase.__init__.<locals>.callback_ptr at 0x10eabbea0>:
Traceback (most recent call last):
  File "/Users/user/.local/lib/python3.6/site-packages/sounddevice.py", line 741, in callback_ptr
    return _wrap_callback(callback, data, frames, time, status)
  File "/Users/user/.local/lib/python3.6/site-packages/sounddevice.py", line 2517, in _wrap_callback
decRate: 12, newFs : 200000.0, dec_audio: 4
Output audio: 2048 samples, audioFreq: 44100, audioFs: 50000.0
    callback(*args)
  File "rtl-fm-cont.py", line 120, in audio_callback
    outdata[:] = data
ValueError: could not broadcast input array from shape (2048) into shape (2048,1)
Fetching 98304 IQ samples from SDR #0
decRate: 12, newFs : 200000.0, dec_audio: 4
Output audio: 2048 samples, audioFreq: 44100, audioFs: 50000.0

您的错误是在'i'和'j'变量声明中。我建议您在要使用的上下文中声明一个变量，而不要在该上下文之外重用它。

Answer 3

使用Linq扩展方法Cast和ToArray的快速单行代码即可解决问题。我相信Cast只是将数组中的所有项目（从所有维度中提取），将其转换为指定的类型，然后以IEnumerable的形式返回（ToArray然后转换为数组）：

int[] oneDimensionalArray = twoDimensionalArray.Cast<int>().ToArray();

另一种实现方法是使用foreach循环，该循环将遍历二维数组的两个维度：

int index = 0;

foreach (var item in twoDimensionalArray)
{
    oneDimensionalArray[index++] = item;
}

代码示例：

var rnd = new Random();
var rowCount = 10;
var colCount = 10;

// Populate two dimensional array. You could also use this "double for loop" structure 
// to read the multi-dimensional array and then populate the one dimensional array.
var twoD = new int[rowCount, colCount];

for (var row = 0; row < rowCount; row++)
{
    for (var col = 0; col < colCount; col++)
    {
        twoD[row, col] = rnd.Next();
    }
}

// Populate one dimensional array with a foreach loop. Use a separate 
//  hold the index value for the one dimentional array
var oneD = new int[rowCount * colCount];
var index = 0;

foreach (var item in twoD)
{
    oneD[index++] = item;
}

尝试将2d阵列转换为1d阵列，有人可以帮我吗

3 个答案: