Invalid rhs Error When Sending 2D Array to Production Server

Hi, I am attempting to send a simple 2D array to a function I have deployed on production server that expects a single input argument. I have the following JavaScript code (mostly copied from these docs (https://www.mathworks.com/help/mps/restfuljson/postasynchronousrequest.html)):

var data = JSON.stringify({   
    rhs: track,
    "nargout": 1,
    "outputFormat": {"mode": "large","nanType": "object"}
});
console.log(data);
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://localhost:9910/finalAnalysis/analysisV1");
xhr.setRequestHeader("content-type", "application/json");
xhr.addEventListener("readystatechange", function () {
    if (this.readyState === 4) {
        console.log(this.responseText);
    }
});
xhr.send(data);

Where track is the array I want to send to the server.

Please note I have also attempted wrapping the track argument in brackets like so: rhs: [track], however I still get the same following error:

analysis.js:91 POST http://localhost:9910/finalAnalysis/analysisV1 400 (InvalidInputArgs Invalid rhs. (request id=0:134:7))

I've looked around the docs and I'm having difficulty figuring out how to properly format my rhs to solve this error. Can someone help me?

Answer 1

[Zachary Khan]

I figured out the issue I was having. For anyone who is wondering, the track array I was passing in was an array of string values, when it needed to be an array of actual numbers, so I converted each of the strings to numbers using Number() in JavaScript. Here's the nested loop I wrote to do this, don't know if it's the best way but it works:

let track = new Array(trackStr.length);

for (i = 0; i < trackStr.length; i++) {

track[i] = new Array(trackStr[0].length); // Initialize an empty array of the correct dimensions

}

for (j = 0; j < trackStr[0].length; j++) {

for (i = 0; i < trackStr.length; i++) {

if (trackStr[i][j]) { // Check that this array index has a value that exists

track[i][j] = (Number(trackStr[i][j])); // Insert the numerical version of the string into the same position in the empty array. (Note Number method is used because it handles scientific notation values too)

}

}

}