ratih

“scripts”: {
"build-css": "node-sass src/ -o src/",
"build-js": "react-scripts build",
"build": "npm run build-css && npm run build-js",
"start-css": "npm run build-css && npm run build-css -- --watch --recursive",
"start-js": "react-scripts start",
"start": "npm-run-all -p start-css start-js",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject"
},

<?php
class dht22{
 public suhu, this->connect();
  suhu, this->link = mysqli_connect('localhost','root','') or die('Cannot connect to the DB');
  mysqli_select_db(suhu, query = "insert into dht_data set kelembaban='".suhu."'";
  this->link,query);
  if(_GET['dataSuhu'] != '' and  dht22=new dht22(_GET['dataKelembaban']);
}

?>

At first, we sample in the ( is odd) equidistant points around :
[
   f_k = f(x_k),: x_k = x^*+kh,: k=-frac{N-1}{2},dots,frac{N-1}{2}
]
where is some step.
Then we interpolate points by polynomial
begin{equation} label{eq:poly}
   P_{N-1}(x)=sum_{j=0}^{N-1}{a_jx^j}
end{equation}
Its coefficients are found as a solution of system of linear equations:
begin{equation} label{eq:sys}
   left{ P_{N-1}(x_k) = f_kright},quad k=-frac{N-1}{2},dots,frac{N-1}{2}
end{equation}
Here are references to existing equations: (ref{eq:poly}), (ref{eq:sys}).
Here is reference to non-existing equation (ref{eq:unknown}).

begin{tikzpicture}
[+preamble]
   usepackage{pgfplots}
   pgfplotsset{compat=newest}
[/preamble]
   begin{axis}
    addplot3[surf,domain=0:360,samples=40] {cos(x)*cos(y)};
   end{axis}
end{tikzpicture}

[
   f_k = f(x_k),: x_k = x^*+kh,: k=-frac{N-1}{2},dots,frac{N-1}{2}
]

[ x = frac{a}{b} ]