我具有将数据集分为训练集和测试集的功能：
def train_test_split(df, train_percent=.7, seed=None):
np.random.seed(seed)
perm = np.random.permutation(df.index)
m = len(df.index)
train_end = int(train_percent * m)
train = df.iloc[perm[:train_end]]
test = df.iloc[perm[train_end:]]
return train, test
它在249681 rows × 9 columns的数据帧上正常工作
其中，由于缺少太多值，我决定删除4列：
df_subset_dup = df_encode.iloc[:,:5]
df_subset = df_subset_dup.drop_duplicates()
此后，当我执行df_trainRaw4, df_testRaw4 = train_test_split(df_subset)时，我得到IndexError: positional indexers are out-of-bounds。但是，执行df_trainRaw4, df_testRaw4 = train_test_split(df_subset_dup)不会返回任何错误。
我正在使用drop_duplicates导致该错误的原因以及如何纠正该错误？
答案 0 :(得分：1)
public enum UnitType { Ground, Air, Water }
public enum AttackType { None, Ground, Air, Water }
public class Unit : MonoBehaviour {
public UnitType unitType;
public AttackType attackType;
void OnTriggerEnter(Collider other) {
Unit unit = other.GetComponent<Unit>();
if(unit.unitType == attackType) {
// Send current unit to attack here
}
}
}
是数据框的实际索引，但是您正在使用基于位置的public class mainClass2 extends Application {
Stage window;
TableView<syncedFolders> folderTable;
Button file, edit, view, addFolder, printInfo, close, deleteFolder;
private String name, location, dateModified;
private long size;
private double printSize = 0, bytes = 0, kilobytes = 0, megabytes = 0, gigabytes = 0, tempSize = 0;
private String printSizeAb = "";
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) throws Exception {
window = primaryStage;
HBox topMenu = new HBox();
file = new Button("File");
edit = new Button("Edit");
view = new Button("View");
topMenu.getChildren().addAll(file, edit, view);
VBox leftMenu = new VBox();
printInfo = new Button("Print folder info");
printInfo.setOnAction(e -> {
round(printSize, 1);
System.out.println("Name: " + name);
System.out.println("Location: " + location);
System.out.println("Last Modified: " + dateModified);
System.out.println("Size: " + tempSize + printSizeAb);
});
leftMenu.getChildren().add(printInfo);
HBox botBox = new HBox();
addFolder = new Button("Add Folder");
deleteFolder = new Button("Delete Folder");
close = new Button("Exit");
addFolder.setOnAction(e -> {
DirectoryChooser chooser = new DirectoryChooser();
chooser.setTitle("JavaFX Projects");
File defaultDirectory = new File("D:\\");
chooser.setInitialDirectory(defaultDirectory);
File selectedDirectory = chooser.showDialog(window);
name = selectedDirectory.getName();
location = selectedDirectory.toString();
size = getFolderSize(selectedDirectory);
bytes = size;
kilobytes = (bytes / 1024);
megabytes = (kilobytes / 1024);
gigabytes = (megabytes / 1024);
if (bytes < 1024) {
printSize = kilobytes;
printSizeAb = " KB";
} else if (bytes >= 1024 && bytes < Math.pow(1024, 3)) {
printSize = megabytes;
printSizeAb = " MB";
} else // if (bytes >= Math.pow(1024, 2) && bytes <= Math.pow(1024, 3))
{
printSize = gigabytes;
printSizeAb = " GB";
}
addFolder();
lasModifiedDate();
});
// Name column
TableColumn<syncedFolders, String> nameCol = new TableColumn<>("Name");
nameCol.setMinWidth(200);
nameCol.setCellValueFactory(new PropertyValueFactory<>("name"));
// location column
TableColumn<syncedFolders, String> locationCol = new TableColumn<>("Location");
locationCol.setMinWidth(200);
locationCol.setCellValueFactory(new PropertyValueFactory<>("location"));
// date modified column
TableColumn<syncedFolders, String> dateModifiedCol = new TableColumn<>("Last Modified");
dateModifiedCol.setMinWidth(200);
dateModifiedCol.setCellValueFactory(new PropertyValueFactory<>("dateModified"));
// size column
TableColumn<syncedFolders, Double> sizeCol = new TableColumn<>("Size");
sizeCol.setMinWidth(200);
sizeCol.setCellValueFactory(new PropertyValueFactory<>("size"));
folderTable = new TableView<>();
folderTable.setItems(getSyncedFolders());
folderTable.getColumns().addAll(nameCol, locationCol, dateModifiedCol, sizeCol);
close.setOnAction(e -> closeProgram());
botBox.setPadding(new Insets(10, 10, 10, 10));
botBox.setSpacing(10);
botBox.getChildren().addAll(addFolder, deleteFolder, close);
BorderPane borderPane = new BorderPane();
borderPane.setTop(topMenu);
borderPane.setLeft(leftMenu);
borderPane.setCenter(folderTable);
borderPane.setBottom(botBox);
Scene scene = new Scene(borderPane, 800, 600);
window.setScene(scene);
window.setTitle("the title");
window.show();
window.setOnCloseRequest(e -> {
e.consume();
closeProgram();
});
}
// Get all of the products
public ObservableList<syncedFolders> getSyncedFolders() {
ObservableList<syncedFolders> folders = FXCollections.observableArrayList();
folders.add(new syncedFolders("Folder", "D://", "July", 3.4));
folders.add(new syncedFolders(name, location, dateModified, tempSize));
return folders;
}
public void addFolder() {
round(printSize, 1);
folderTable.setItems(getSyncedFolders());
folderTable.getItems().add(new syncedFolders(name, location, dateModified, tempSize));
}
private double round(double value, int precision) {
int scale = (int) Math.pow(10, precision);
tempSize = (double) Math.round(value * scale) / scale;
return tempSize;
}
public String lasModifiedDate() {
Path path = Paths.get(location);
DateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy - hh:mm:ss");
FileTime fileTime = null;
try {
fileTime = Files.getLastModifiedTime(path);
} catch (IOException e1) {
System.out.println("Cannot get the last modified time");
}
dateModified = dateFormat.format(fileTime.toMillis());
return dateModified;
}
private long getFolderSize(File folder) {
long length = 0;
File[] files = folder.listFiles();
int count = files.length;
for (int i = 0; i < count; i++) {
if (files[i].isFile()) {
length += files[i].length();
} else {
length += getFolderSize(files[i]);
}
}
return length;
}
private void closeProgram() {
/**
* Alert alert = new Alert(AlertType.CONFIRMATION); alert.setTitle("Confirmation
* Dialog"); alert.setHeaderText("You are about to exit");
* alert.setContentText("Are you ok with this?");
*
* Optional<ButtonType> result = alert.showAndWait(); if (result.get() ==
* ButtonType.OK)
**/
window.close();
}
}
public class syncedFolders {
private String name, location, dateModified;
private double size;
public syncedFolders() {
this.name = "";
this.location = "";
this.dateModified = "";
this.size = 0;
}
public syncedFolders(String s) {
this.name = s;
}
public syncedFolders(String name, String location, String dateModified, double size) {
this.name = name;
this.location = location;
this.dateModified = dateModified;
this.size = size;
}
public String getname() {
return name;
}
public void setname(String s) {
name = s;
}
public String getlocation() {
return location;
}
public void setlocation(String s) {
location = s;
}
public String getdateModified() {
return dateModified;
}
public void setdateModified(String s) {
dateModified = s;
}
public double getsize() {
return size;
}
public void setsize(double d) {
size = d;
}
}
来用perm子集数据框；这可能是在删除重复项之后删除了一些索引，现在最大的索引大于数据帧的行数的问题。将iloc更改为perm应该可以解决此问题：
iloc