我尝试使用sklearn LDA分析稀疏数据集（但不仅仅是那个，我还尝试过个人实现）。数据集有14列和一些不同数量的列，我选择这些列来运行不同的实验，保留那些具有最大差异的列。
<?php
//database connection
$con = mysqli_connect("localhost","root","","eprodavnica");
// function for getting ip address of the client
/*In this PHP function, first attempt is to get the direct IP address of client’s machine, if not available then try for forwarded for IP address using HTTP_X_FORWARDED_FOR. And if this is also not available, then finally get the IP address using REMOTE_ADDR.*/
function getIp()
{
if (!empty($_SERVER['HTTP_CLIENT_IP'])) //check ip from share internet
{
$ip=$_SERVER['HTTP_CLIENT_IP'];
}
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) //to check ip is pass from proxy
{
$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
}
else
{
$ip=$_SERVER['REMOTE_ADDR'];
}
return $ip;
}
//adding a single product to cart
function cart() {
if(isset($_GET['add_cart'])) {
global $con;
$ip = getIp();
$pro_id = $_GET['add_cart'];
$run_check = mysqli_query($con,"SELECT * FROM cart WHERE ip_add = '$ip' AND p_id = '$pro_id'") or die(mysqli_error($con));
if(mysqli_num_rows($run_check)>0) {
echo "";
} else {
$run_pro = mysqli_query($con, "INSERT INTO cart (p_id, ip_add, qty) values ('$pro_id','$ip',1)") or die(mysqli_error($con));
echo "<script>window.open('index.php','_self')</script>";
}
}
}
//getting the total added items
function totalItems() {
if(isset($_GET['add_cart'])) {
global $con;
$ip = getIp();
$run_items = mysqli_query($con, "SELECT * FROM cart WHERE ip_add='$ip'");
$count_items = mysqli_num_rows($run_items);
} else {
global $con;
$ip = getIp();
$run_items = mysqli_query($con, "SELECT * FROM cart WHERE ip_add='$ip'") or die(mysqli_error($con));
$count_items = mysqli_num_rows($run_items);
}
echo $count_items;
}
//getting the total Price of items in the cart
function totalPrice() {
$total = 0;
global $con;
$ip = getIp();
$run_price = mysqli_query($con,"SELECT * FROM cart WHERE ip_add = '$ip'");
while($row_pro_price = mysqli_fetch_array($run_price)) {
$pro_id = $row_pro_price['p_id'];
$run_pro_price2 = mysqli_query($con,"SELECT * FROM products WHERE product_id = '$pro_id'");
while($row_pro_price2 = mysqli_fetch_array($run_pro_price2)) {
$pro_price = array($row_pro_price2['product_price']);
$pro_price_values = array_sum($pro_price);
$total += $pro_price_values;
}
}
echo "$" . $total;
}
//getting the categories
function getCats() {
global $con;
$run_cats = mysqli_query($con,"SELECT * FROM categories");
while($row_cats = mysqli_fetch_array($run_cats)) {
$cat_id = $row_cats['cat_id'];
$cat_title = $row_cats['cat_title'];
echo "<li>
<a href='index.php?cat=$cat_id'>$cat_title</a>
</li>";
}
}
//getting the brands
function getBrands() {
global $con;
$run_brands = mysqli_query($con,"SELECT * FROM brands");
while($row_brands = mysqli_fetch_array($run_brands)) {
$brand_id = $row_brands['brand_id'];
$brand_title = $row_brands['brand_title'];
echo "<td>
<a href='index.php?brand=$brand_id'>$brand_title</a>
</td>";
}
}
//getting products on main page
function getPro() {
if(!isset($_GET['cat'])){
if(!isset($_GET['brands'])) {
global $con;
$run_pro = mysqli_query($con,"SELECT * FROM products ORDER BY RAND() LIMIT 0,9");
while($row_pro = mysqli_fetch_array($run_pro)) {
$pro_id = $row_pro['product_id'];
$pro_cat = $row_pro['product_cat'];
$pro_brand = $row_pro['product_brand'];
$pro_title = $row_pro['product_title'];
$pro_price = $row_pro['product_price'];
$pro_image = $row_pro['product_image'];
echo "
<div class='single-product cf'>
<h4><a href='#'>$pro_title</a></h4>
<a href='details.php?pro_id=$pro_id'><img src='admin/product_images/$pro_image' /></a>
<p>
Price: $ $pro_price
</p>
<a href='index.php?add_cart=$pro_id'><button>Add To Cart</button></a>
</div>
";
}
}
}
}
//getting the category products
function getCatPro() {
if(isset($_GET['cat'])){
$cat_id = $_GET['cat'];
global $con;
$run_cat_pro = mysqli_query($con,"SELECT * FROM products WHERE product_cat = '$cat_id'");
$count_cats = mysqli_num_rows($run_cat_pro);
if($count_cats == 0) {
echo "<div class='no-cat'>
<h1> We're sorry! There are currently no products with that category. :(</h1>
</div>";
} else {
while($row_cat_pro = mysqli_fetch_array($run_cat_pro)) {
$pro_id = $row_cat_pro['product_id'];
$pro_cat = $row_cat_pro['product_cat'];
$pro_brand = $row_cat_pro['product_brand'];
$pro_title = $row_cat_pro['product_title'];
$pro_price = $row_cat_pro['product_price'];
$pro_image = $row_cat_pro['product_image'];
echo "
<div class='single-product cf'>
<h4><a href='#'>$pro_title</a></h4>
<a href='details.php?pro_id=$pro_id'><img src='admin/product_images/$pro_image' /></a>
<p>
Price: $ $pro_price
</p>
<a href='index.php?add_cart=$pro_id'><button>Add To Cart</button></a>
</div>
";
}
}
}
}
//getting the brand products (in this case sex)
function getBrandPro() {
if(isset($_GET['brand'])){
$brand_id = $_GET['brand'];
global $con;
$run_brand_pro = mysqli_query($con,"SELECT * FROM products WHERE product_brand = '$brand_id'") or die(mysqli_error($con));
$count_brands = mysqli_num_rows($run_brand_pro);
if($count_brands == 0) {
echo "<div class='no-cat'>
<h1> We're sorry! There are currently no products for that sex. :(</h1>
</div>";
} else {
while($row_brand_pro = mysqli_fetch_array($run_brand_pro)) {
$pro_id = $row_brand_pro['product_id'];
$pro_cat = $row_brand_pro['product_cat'];
$pro_brand = $row_brand_pro['product_brand'];
$pro_title = $row_brand_pro['product_title'];
$pro_price = $row_brand_pro['product_price'];
$pro_image = $row_brand_pro['product_image'];
echo "
<div class='single-product cf'>
<h4><a href='#'>$pro_title</a></h4>
<a href='details.php?pro_id=$pro_id'><img src='admin/product_images/$pro_image' /></a>
<p>
Price: $ $pro_price
</p>
<a href='index.php?add_cart=$pro_id'><button>Add To Cart</button></a>
</div>
";
}
}
}
}
如果我使用2个或更多组件，或者如果我保留所有组件或只有两个组件具有最大差异，则无关紧要，因此我总是得到1列。 为什么我只获得一列？申请LDA有哪些要求？