give the matlab command(s) that change all the -1 values in age to nan in javascript

Here's an example JavaScript code snippet that replaces all occurrences of -1 in an age array with NaN:

index.tsx
for (var i = 0; i < age.length; i++) {
  if (age[i] === -1) {
    age[i] = NaN;
  }
}
86 chars
6 lines

In this code, we iterate through the age array using a for loop, and use an if condition to check if the current value is -1. If it is, we replace it with NaN. Note that NaN is a special value in JavaScript that represents "Not a Number".