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Answers for "convert 2d array to 1d"

Python
1

CSV to 2D array javaescript

function csvToArray(csv, delimiter = ",", omitFirstRow = false) {
  console.log(csv.indexOf('n'));
  return csv.slice(omitFirstRow ? csv.indexOf('n')+1 : 0)
            .split("n")
            .map((element) => element.split(delimiter));
}

let csv1 = "a,bnc,d";
let csv2 = "a;bnc;d";
let csv3 = "head1,head2na,bnc,d";

let result1 = csvToArray(csv1);
let result2 = csvToArray(csv2);
let result3 = csvToArray(csv3);

console.log(result1);
console.log(result2);
console.log(result3);
Posted by: Guest on November-19-2020
-2

numpy convert 1d array to 2d

import numpy as np 

# 1D array 
one_dim_arr = np.array([1, 2, 3, 4, 5, 6])

# to convert to 2D array
# we can use the np.ndarray.reshape(shape) function 
# here shape is given by two integers seperated by a comma
# the two integers specify m,n for the new matrix 
# ensure that the matrix that you are trying to generate
# has a size that meets the number of elements in the 1D array. 
# for that make sure that 
# m * n = number of elements in the one dimentional array 

two_dim_arr = one_dim_arr.reshape(1, 6)

#which returns a 2D array
print(two_dim_arr)


# confirmed by the array.ndim attribute
print(two_dim_arr.ndim)

# you can even specify one of the dimensions as unknown by passing -1
# numpy will infer the length using the array and remaining dimensions

two_dim_arr = one_dim_arr.reshape(1,-1)
Posted by: Guest on November-14-2020
1

array 2d to 1d

int array[width * height];

 int SetElement(int row, int col, int value)
 {
    array[width * row + col] = value;  
 }
Posted by: Guest on January-28-2020
0

convert json to 2d array

function jsonArrayTo2D(arrayOfObjects){
  let header = [],
      AoA = [];
  arrayOfObjects.forEach(obj => {
    Object.keys(obj).forEach(key => header.includes(key) || header.push(key))
    let thisRow = new Array(header.length);
    header.forEach((col, i) => thisRow[i] = obj[col] || '')
    AoA.push(thisRow);
  })
  AoA.unshift(header);
  return AoA;
}
Posted by: Guest on January-22-2020

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