how to change string back to number in matlab in javascript

To convert a string to a number in JavaScript, you can use the parseInt() or parseFloat() functions depending on the desired outcome.

Here's an example of converting a string to a number in JavaScript:

index.tsx
let str = "123";
let num = parseInt(str);

console.log(num); // Output: 123
console.log(typeof num); // Output: number
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In MATLAB, you can use the str2double() function to convert a string to a double (floating-point number).

Here's an example of converting a string to a number in MATLAB:

main.m
str = '123';
num = str2double(str);

disp(num); % Output: 123
disp(class(num)); % Output: double
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Note that str2double() will return NaN (not a number) if the conversion fails, while parseInt() and parseFloat() in JavaScript will return NaN if the string cannot be converted to a number.