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Convert string to 2d double array


Convert string to 2d double array

By : Ludibrius
Date : November 19 2020, 12:41 AM
Hope this helps I want to convert string to 2d double array.My string is :"(-34.17141334413566, 148.1231689453125),(-34.371148707267096, 149.0130615234375),(-34.475366823896806, 147.919921875)". And the result is like double[3][3] y = {{-34.17141334413566, 148.1231689453125},{-34.371148707267096,149.0130615234375},{-34.475366823896806, 147.919921875}}.I am new to java.help anybody thanks in advance. , Try this: (str is your input)
code :
String str = "(-34.17141334413566, 148.1231689453125)," +
            "(-34.371148707267096, 149.0130615234375)," +
            "(-34.475366823896806, 147.919921875)";
str = str.replace("(", "");
String[] rows = StringUtils.split(str, "),");
double[][] doubles = new double[rows.length][StringUtils.split(rows[0], ", ").length];
for (int i = 0; i < rows.length; i++)
{
    String[] cols = StringUtils.split(rows[i], ", ");
    for (int j = 0; j < cols.length; j++)
    {
        cols[j] = cols[j].replace(")", "");
        doubles[i][j] = Double.parseDouble(cols[j]);
    }
}


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How to convert string array to float array and substitute Double.NaN for non-numeric values?

How to convert string array to float array and substitute Double.NaN for non-numeric values?


By : user1825182
Date : March 29 2020, 07:55 AM
Hope this helps I'm writing a parser for CSV data, and am trying to determine how to handle records that are blank ("") or contain character data ("C"). The parser code I have below works great, but forces me to deal with the float conversions later. I'd like to be able to just make my string[][] a float[][], and handle the conversions when I parse the file, but I notice that it blows up with any non-numeric data. Ideally there would be no non-numeric or blank values, but they are unavoidable, and as such, have to be dealt with. , Use this instead of the built-in float conversion:
code :
let cvt s =
  let (ok,f) = System.Double.TryParse(s)
  if ok then f else nan
Convert 2D String array to 2D double

Convert 2D String array to 2D double


By : Young Kim
Date : March 29 2020, 07:55 AM
will be helpful for those in need You initialize unsorted in StringToDouble (with unsorted = new double[d2.length][2];), but the function call in the constructor is currently commented out, so unsorted will never be initialized.
Thus it will be null and a NullPointerException will be thrown here:
code :
System.out.println(unsorted[0][0]);
c# convert string to double array

c# convert string to double array


By : Xiaoquan Wu
Date : March 29 2020, 07:55 AM
I hope this helps you . One of the strings you're converting can't be parsed with ToDouble
So do this instead (inside your loop):
code :
double parsed = 0;
try 
{
    parsed = Convert.ToDouble(fields[i]);
}
catch (FormatException e) 
{ 
    Console.WriteLine("Couldn't parse '{0}'", fields[i]);
    continue;
}

x[i] = parsed;
Console.WriteLine(parsed);
Can't convert string array to double array properly, returns 0

Can't convert string array to double array properly, returns 0


By : user1521884
Date : March 29 2020, 07:55 AM
will be helpful for those in need You don't Parse values from the file. It should be something like this:
code :
 double[] test = System.IO.File
   .ReadLines(new_path)
   .Select(line => double.Parse(line)) // <- each line should be parsed into double
   .ToArray();

 foreach (double number in test) {
   Console.WriteLine(number);
 }         

 Console.ReadLine();
Cannot convert a string array position(2.6) in double new double array

Cannot convert a string array position(2.6) in double new double array


By : Zafer Bozkurt
Date : March 29 2020, 07:55 AM
it fixes the issue It seems that your current culture has a different decimal separator.
You can specify the invariant culture for the parsing, which has a period as decimal separator:
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