morcity.js

// A x B 


const matrix = [["25027M67","25023M67","25021M67","27015M67","29012M66","32012M67"],
                ["26035M68","26033M67","26031M67","27031M68","28027M67","29027M66"],
                ["26052M67","25058M67","26056M67","27060M67","28056M66","29048M66"],
                ["26083M68","26079M67","26068M65","27060M63","29068M62","29071M62"],
                ["27068M66","26066M65","26056M64","27048M62","29054M62","28064M61"]]

const topMax = ["0600W", "0550W", "0500W", "0450W", "0400W", "0350W"]
const leftMax = ["050S", "100S", "150S", "200S", "250S"]

let values = [];

matrix.forEach((rows, i) => {
  rows.forEach((element, j) => {
    if (i !== 0 && j !== 0 && i !== matrix.length - 1 && j !== rows.length - 1) {
      values.push([transformData(getCross(element, i, j)), i, j]);
    }
  })
});

/*
En el eje x:
(ui,vj) = 26033M67 
(ui−1,vj)= 26035M68 
(ui+1 , vj )=26031M67

En el eje y:
(ui, vj+1) = 25058M67 (ui, vj−1) = 25023M67
*/


function getCross(element, i, j) {
    // return a matrix with X, Y axes
    return [[matrix[i][j-1], matrix[i][j+1]], [matrix[i+1][j], matrix[i-1][j]]]
}

//Donde cada valor para 25058M67 significa 250 grados (direcci ́on del viento), 58 kt nudos de intensidad , M representa el signo menos y 67 representa la temperatura como se muestra en la siguiente data.
  
function transformData(matrix, i, j) {
  var x = matrix[0]; // ["25027M67", "25027M67"]
  var y = matrix[1]; // the same

  return [
          [
            2 * Number(x[0].substring(3, 5)) * Math.cos(Number(x[0].substring(0, 3)) * Math.PI / 180), 
            2 * Number(x[0].substring(3, 5)) * Math.sin(Number(x[0].substring(0, 3)) * Math.PI / 180)
          ],
          [
            2 * Number(x[1].substring(3, 5)) * Math.cos(Number(x[1].substring(1, 3)) * Math.PI / 181),
            2 * Number(x[1].substring(3, 5)) * Math.sin(Number(x[1].substring(0, 3)) * Math.PI / 180)]
        ];
} 

function getVorticityPerPoint(matrix) {
  // We use just a X axes, then:
  var x = matrix[0];
  var i = matrix[1];
  var j = matrix[2];
  var difTop = Math.abs(Number(topMax[i+1].substring(0,3)) - Number(topMax[i-1].substring(0,3))) * 10;
  var difLef = Math.abs(Number(leftMax[j+1].substring(0,2)) - Number(leftMax[j-1].substring(0,2))) * 10;

  console.log(difTop, difLef);
}

console.log(values[0])
getVorticityPerPoint(values[0]);