Mean of IO stats

function filterVdaLines(logString) {
  // Split the log string into an array of lines
  const lines = logString.trim().split("\n");

  // Filter the lines to only include those for vda
  const vdaLines = lines.filter((line) => line.includes("vda"));

  // Return the filtered array of vda lines with only one space in between
  return vdaLines.toString().replace(/  +/g, ' ').split(',');
}

// Paste iostat log data 
let logString = ``;

//Filtering header from every log
const lines = filterVdaLines(logString)

// Initialize variables for storing the sum of each field
let tpsSum = 0;
let kbReadsSum = 0;
let kbWritesSum = 0;
let kbDiscardSum = 0;
let kbReadSum = 0;
let kbWriteSum = 0;

// Looping through each line of log data
for (const line of lines) {
  // Spliting the line into an array of fields
  const fields = line.trim().split(" ");

  // Extracting the field values and converting them to numbers
  const tps = Number(fields[1]);
  const kbReads = Number(fields[2]);
  const kbWrites = Number(fields[3]);
  const kbDiscard = Number(fields[4]);
  const kbRead = Number(fields[5]);
  const kbWrite = Number(fields[6]);

  // Adding the field values to their respective sum variables
  tpsSum += tps;
  kbReadsSum += kbReads;
  kbWritesSum += kbWrites;
  kbDiscardSum += kbDiscard;
  kbReadSum += kbRead;
  kbWriteSum += kbWrite;
}

// Calculating the mean of each field
const numLines = lines.length;
const tpsMean = tpsSum / numLines;
const kbReadsMean = kbReadsSum / numLines;
const kbWritesMean = kbWritesSum / numLines;
const kbDiscardMean = kbDiscardSum / numLines;
const kbReadMean = kbReadSum / numLines;
const kbWriteMean = kbWriteSum / numLines;

// Printing the mean of each field
console.log(`tps mean: ${tpsMean}`);
console.log(`kB_read/s mean: ${kbReadsMean}`);
console.log(`kB_wrtn/s mean: ${kbWritesMean}`);
console.log(`kB_dscd/s mean: ${kbDiscardMean}`);
console.log(`kB_read mean: ${kbReadMean}`);
console.log(`kB_wrtn mean: ${kbWriteMean}`);
console.log(`kB_dscd mean: ${kbDiscardMean}`);