对数据框作回归分析r语言代码怎么写

Python016

对数据框作回归分析r语言代码怎么写,第1张

Class.forName("xx.xx")等同于Class.forName("xx.xx",true,CALLClass.class.getClassLoader())，第二个参数(bool)表示装载类的时候是否初始化该类，即调用类的静态块的语句及初始化静态成员变量。 ClassLoader loader = Thread.currentThread.getContextClassLoader()//也可以用

<?php class Request{public static function post($url, $post_data = '', $timeout = 5){//curl$ch = curl_init() curl_setopt ($ch, CURLOPT_URL, $url) curl_setopt ($ch, CURLOPT_POST, 1) if($post_data != ''){curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data) } curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1) curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout) curl_setopt($ch, CURLOPT_HEADER, false) $file_contents = curl_exec($ch) curl_close($ch) return $file_contents } public static function post2($url, $data){//file_get_content $postdata = http_build_query($data ) $opts = array('http' =>array( 'method' =>'POST', 'header' =>'Content-type: application/x-www-form-urlencoded', 'content' =>$postdata )) $context = stream_context_create($opts) $result = file_get_contents($url, false, $context) return $result } public static function post3($host,$path,$query,$others=''){//fsocket$post="POST $path HTTP/1.1\r\nHost: $host\r\n" $post.="Content-type: application/x-www-form-" $post.="urlencoded\r\n${others}" $post.="User-Agent: Mozilla 4.0\r\nContent-length: " $post.=strlen($query)."\r\nConnection: close\r\n\r\n$query" $h=fsockopen($host,80) fwrite($h,$post) for($a=0,$r=''!$a){ $b=fread($h,8192) $r.=$b $a=(($b=='')?1:0) } fclose($h) return $r }}?>