indexes not defined in trControl. Attempting to set them ourselves, so each model in the ensemble will have the same resampling indexes.
时间: 2024-03-18 21:39:34 浏览: 24
这个错误是在使用tunerf_R语言时出现的。出现这个错误的原因是trControl参数没有定义indexes。在不指定indexes的情况下,tunerf_R会尝试自行设置indexes,使得每个模型在集成中都有相同的交叉验证。但是,这可能会导致错误。
解决这个问题的方法是,在tunerf_R函数中指定trControl参数,并明确指定indexes。例如,可以指定indexes为“cv”,这将使用交叉验证来训练模型:
```
library(tunerf_R)
trControl <- trainControl(method = "cv", number = 5)
model <- tunerf_R(x, y, trControl = trControl)
```
在这个例子中,我们使用5折交叉验证来训练模型,并将其传递给tunerf_R函数的trControl参数。这样就可以避免出现indexes not defined in trControl的错误了。
相关问题
In 7.7, what is the best way to query from multiple indexes using Transport Java API?
In Elasticsearch 7.7, the recommended way to query from multiple indexes using the Transport Java API is to use the MultiSearchRequest API.
Here's an example code snippet for querying from multiple indexes using the MultiSearchRequest API:
```
// Create a client object
TransportClient client = new PreBuiltTransportClient(Settings.EMPTY)
.addTransportAddress(new TransportAddress(InetAddress.getByName("localhost"), 9300));
// Create a MultiSearchRequest object
MultiSearchRequest multiSearchRequest = new MultiSearchRequest();
// Add multiple search requests to the MultiSearchRequest object
multiSearchRequest.add(SearchRequestBuilders.searchRequest("index1").source(query));
multiSearchRequest.add(SearchRequestBuilders.searchRequest("index2").source(query));
// Execute the MultiSearchRequest
MultiSearchResponse multiSearchResponse = client.multiSearch(multiSearchRequest).actionGet();
// Process the response
for (MultiSearchResponse.Item item : multiSearchResponse.getResponses()) {
SearchResponse searchResponse = item.getResponse();
// Process the search response for each index
}
// Close the client object
client.close();
```
In this code snippet, we first create a TransportClient object and a MultiSearchRequest object. We then add multiple SearchRequest objects to the MultiSearchRequest object, with each SearchRequest targeting a different index. We then execute the MultiSearchRequest using the client object, and process the response for each index.
Note that the above code snippet uses the deprecated TransportClient API. It is recommended to use the Java High Level REST Client or the Java Low Level REST Client instead.
4. Implement the method copyArray. Use indexes to implement this method. • public static Employee[] copyArray(Employee[] array).
Sure, here's the implementation for the `copyArray` method that takes an array of `Employee` objects and returns a new array with the same elements:
```java
public static Employee[] copyArray(Employee[] array) {
Employee[] newArray = new Employee[array.length];
for (int i = 0; i < array.length; i++) {
newArray[i] = array[i];
}
return newArray;
}
```
In this implementation, we create a new array `newArray` with the same length as the input array `array`. Then, we iterate over the indexes of `array`, copying the element at each index to the corresponding index in `newArray`. Finally, we return `newArray`.
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