如何在c#中使用一维字符串类型数组代替双类型二维锯齿数组？

Question

I have data in this form:

double[][] rawData = new double[3][];
rawData[0] = new double[] { 65.0, 220.0 };
rawData[1] = new double[] { 73.0, 160.0 };
rawData[2] = new double[] { 59.0, 110.0 };

Now I want to import data from text file and use in place of this array data. I want double type jagged array for text file data too.

Data of each row in file is of form: 5.1,3.5,1.4,0.2

There are total 150 rows in text file. I want to read file line by line, split by comma and save each line in double type array as in case of rawData[]][] .

Answer 1

Try using Linq , you have to

1. Read file line by line
2. Split each line into items by comma
3. Convert each item into Double
4. Materialize items into (inner) array
5. Materialize lines into (outer) array

Implementation

  // let txt file being a CSV-like one
  Double[][] data = File
    .ReadLines(@"C:\MyFile.txt")
    .Where(line => !String.IsNullOrEmpty(line.Trim())) // to remove empty lines if any
    .Select(line => line.Split(','))
    .Select(items => items
      .Select(item => Double.Parse(item, CultureInfo.InvariantCulture))
      .ToArray()) // inner array
    .ToArray();   // outer array