我在R中使用RWeka软件包以适应M5＆＃39;使用＆＃34; M5P＆＃34;将树映射到数据集。然后我想将生成的树转换为＆＃34; party＆＃34;树，这样我就可以访问变量的重要性。我遇到的问题是我似乎无法使函数"Error: all(sapply(split, head, 1) %in% c("<=", ">")) is not TRUE"
正常工作而不会出现以下错误：
n <- nrow(data)
k <- 5
indCV <- sample( rep(1:k,each=ceiling(n/k)), n)
for(i in 1:k){
#Training data is for all the observations where indCV is not equal to i
training_data <- data.frame(x[-which(indCV==i),])
training_response <- y[-which(indCV==i)]
#Test the data on the fifth of the data where the observation indices are equal to i
test_data <- x[which(indCV==i),]
test_response <- y[which(indCV==i)]
#Fit a pruned model to the training data
fit <- M5P(training_response~., data=training_data, control=Weka_control(N=TRUE))
#Convert to party
p <- as.party(fit)
}
只有当我在for循环中应用函数时才会出现此错误，但是当我运行5次交叉验证时，for循环是必需的。
以下是我一直在运行的代码：
RWeka答案 0 :(得分：2)
M5P包中有一个将party树转换为example("M5P", package = "RWeka")个对象的示例。如果您运行partykit，则树可视化实际上由plot(m3)绘制。运行示例后，请参阅as.party(m3)和J48。
但是，对于constparty，您可以获得一个完全成熟的M5P对象，party也是如此。在后一种情况下，树结构本身可以转换为lm，但节点内的线性模型不能完全直接转换为party个对象。因此，如果要使用party表示来计算仅依赖于树结构的度量（例如，用于拆分的变量，拆分数，拆分点等），那么您可以这样做。但是，如果您想要计算取决于模型或预测的度量（例如，均方误差等），那么public class FragmentGlobalfeed extends android.support.v4.app.Fragment {
public static final int CONNECTION_TIMEOUT = 10000;
public static final int READ_TIMEOUT = 15000;
private android.support.v7.widget.RecyclerView mRVProfile;
private com.example.admin.quoteme.AdapterProfile mAdapter;
private android.widget.LinearLayout llLayout;
@Override
public void onCreate(android.os.Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//background doesn't seem to be able to launch so i am gonna take an alt step and try methods to update
//BackgroundFeed backgroundFeed = new BackgroundFeed(getActivity());
//backgroundFeed.execute();
/*AsyncLogin asyncLogin = new com.example.admin.quoteme.FragmentGlobalfeed.AsyncLogin();
asyncLogin.execute();*/
new com.example.admin.quoteme.FragmentGlobalfeed.AsyncLogin().execute();
}
@Override
public android.view.View onCreateView(android.view.LayoutInflater inflater, android.view.ViewGroup container, android.os.Bundle savedInstanceState) {
// Inflate the layout for this fragment
android.view.View view = inflater.inflate(com.example.admin.quoteme.R.layout.fragmentglobalfeed, null);
java.util.List<Profile> data = new java.util.ArrayList<>();
//recyclerview
mRVProfile = (android.support.v7.widget.RecyclerView) view.findViewById(com.example.admin.quoteme.R.id.recyclerViewGlobal);
mRVProfile.setLayoutManager(new android.support.v7.widget.LinearLayoutManager(getActivity()));
mAdapter = new AdapterProfile(getActivity(), data);
mRVProfile.setAdapter(mAdapter);
return view;
}
private class AsyncLogin extends android.os.AsyncTask<String, String, String> {
java.net.HttpURLConnection conn;
java.net.URL url = null;
@Override protected void onPreExecute(){
super.onPreExecute();
}
@Override
protected String doInBackground(String... params) {
try{
//enter url address where ur json file is
url = new java.net.URL("http:http://192.168.0.100/Quoteme/getfeed.php");
} catch (java.net.MalformedURLException e){
e.printStackTrace();
return e.toString();
}
try {
conn = (java.net.HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("GET");
conn.setDoOutput(true);
} catch (java.io.IOException e1) {
e1.printStackTrace();
return e1.toString();
}
try{
int response_code = conn.getResponseCode();
if(response_code == java.net.HttpURLConnection.HTTP_OK){
//read data
java.io.InputStream input = conn.getInputStream();
java.io.BufferedReader reader = new java.io.BufferedReader(new java.io.InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
return (result.toString());
} else {
return("unsuccessful");
}
} catch (java.io.IOException e){
e.printStackTrace();
return e.toString();
} finally {
conn.disconnect();
}
}
@Override
protected void onPostExecute(String result){
java.util.List<Profile> data = new java.util.ArrayList<>();
try {
org.json.JSONArray jArray = new org.json.JSONArray(result);
//extraction
for(int i= 0; i<jArray.length(); i++){
org.json.JSONObject json_data = jArray.getJSONObject(i);
Profile profile = new Profile();
profile.setUser_id(json_data.getString("user_id"));
profile.setQuote_points(json_data.getInt("quote_points"));
profile.setQuote(json_data.getString("quote_description"));
data.add(profile);
}
//setup and hand data over to rv // adapter
/*mRVProfile = (android.support.v7.widget.RecyclerView)llLayout.findViewById(com.example.admin.quoteme.R.id.recyclerViewGlobal);
mAdapter = new AdapterProfile(getActivity(), data);
mRVProfile.setAdapter(mAdapter);
mRVProfile.setLayoutManager(new android.support.v7.widget.LinearLayoutManager(getActivity()));*/
} catch (org.json.JSONException e){
android.widget.Toast.makeText(getActivity(),e.toString(), android.widget.Toast.LENGTH_LONG);
}
}
}
类将不会有太大帮助。