gbm | Gradient boosted models | Machine Learning library
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Gradient boosted models (the old gbm package)
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QUESTION
I have a list of dataframes and the ninth column in all the dataframes is a list of tuples. I am trying to extract the first element from this list of tuples. If the number of element/elements obtained after removing the second element in the list of all the tuples is less than five I want to remove that row.
But for the moment I am not able to get only the first element of all the tuples in the list, I have looked the various responses given on the stackoverflow but no solution worked for me.
I have shown parts of the data below and also the code I have tried has been shown below,
...ANSWER
Answered 2022-Apr-03 at 17:16IIUC, you could use a comprehension:
QUESTION
Here my data for boosting
...ANSWER
Answered 2022-Mar-11 at 09:33Are you looking for something like the following?
QUESTION
I wanted to use the optimal k value to conduct kNN clasification and predict the dependent variable diabetes in test set using train set and compare the results with the real values.
I've already got optimal k value and got the accruacy already. After that, I wanted to compare the results with the real value with using confussionMatrix but I got the problem with the different length.
I've already checked that nrow and length quantities are same(with 74) but it still have same problem.
Could you help me to overcome this problem?
My codes are as like below
...ANSWER
Answered 2022-Feb-11 at 05:27I think you are looking to this:
QUESTION
I just wanted to conduct a kNN classification with the situation when k is 3. I would like to predict the dependent variable “diabetes” in valid set using train set and calculate the accuracy.
But I faced to the error message with
Error in knn(train = TrainXNormDF, test = ValidXNormDF, cl = MLdata2[, : 'train' and 'class' have different lengths
I can't solve this problem with get approach with
...ANSWER
Answered 2022-Feb-10 at 14:48Your cl
variable is not the same length as your train
variable. MLValidY
only has 74 observations, while TrainXNormDF
has 224.
cl
should provide the true classification for every row in your training set.
Furthermore, cl
is a data.frame instead of a vector.
Try the following:
QUESTION
It's my first time using TypeScript and using OOP. I've created an interface for a common brokers methods. (Buy, Sell, sell limit, buy limit)
Then i implemented this interface with my brokers API. GBM, Bitso, IB, AmeriTrade and so on i want to instance the correct class through a received string in my end point
example: "/api/broker/:brokername" so i created the following code:
...ANSWER
Answered 2022-Feb-08 at 18:03You seem to want to be able to pass in string
as the broker key, since this is coming from an API input.
That means you can declare a list of supported classes and their keys outside the BrokerIgniter
class, (though a static field would work, too).
QUESTION
In NodeJS I'm trying to verify a message was sent by Google before processing the message contents.
This is done by comparing the message header "x-goog-signature" to a generated signature.
The generated signature code takes as input the service account key and the http raw body.
Following this example.
...ANSWER
Answered 2022-Feb-05 at 10:49The example you're referring to seems to answer your question with a link:
QUESTION
Update: The problem does not occur with the NVIDIA driver version 510 anymore.
I am running Android Studio 2020.3.1 on Wayland and I'm using the proprietary NVIDIA driver version 495, which allows me to use the the regular GBM implementation of Wayland instead of the especially tailored EGL version.
My problem is, that every time I try to start an Android emulator (AVD) via the AVD Manager, I get the following message after a few seconds:
The emulator process for AVD Pixel_2_API_30 has terminated.
Starting the AVD from the command-line shows that a segmentation fault occurred:
...ANSWER
Answered 2022-Jan-26 at 23:15I was able to work around the segmentation fault, by disabling the Vulkan support for AVDs. This can be easily achieved by adding the following line to the file ~/.android/advancedFeatures.ini:
QUESTION
Using the h2o package for R, I created a set of base models using AutoML with StackedEnsemble's disabled. Thus, the set of models only contains the base models that AutoML generates by default (GLM, GBM, XGBoost, DeepLearning, and DRF). Using these base models I was able to successfully train a default stacked ensemble manually using the h2o.stackedEnsemble function (i.e., a GLM with default params). I exported the model as a MOJO, shutdown the H2O cluster, restarted R, initialized a new H2O cluster, imported the stacked ensemble MOJO, and successfully generated predictions on a new validation set.
So far so good.
Next, I did the exact same thing following the exact same process, but this time I made one change: I trained the stacked ensemble with all pairwise interactions between the base models. The interactions were created automatically by feeding a list of the base model Ids to the interaction metalearner_parameter. The model appeared to train without issue and (as I described above) was able to export it as a MOJO, restart the h2o cluster, restart R, and import the MOJO. However, when I attempt to generate predictions on the same validation set I used above I get the following error:
...ANSWER
Answered 2022-Jan-06 at 14:54Unfortunately, H2O-3 doesn't currently support exporting GLM with interactions as MOJO. There's a bug that allows the GLM to be exported with interactions but the MOJO doesn't work correctly - the interactions are replaced by missing values. This should be fixed in the next release (3.36.0.2) - it will not allow to export that MOJO in the first place.
There's not much other than writing the stacked ensemble in R (base model predictions preprocessing (e.g., interaction creation) and then feeding it to the h2o.glm) that you can do. There is now an unmaintained package h2oEnsemble that might be helpful for that. You can also use another metalearner model that is more flexible, e.g., GBM.
QUESTION
Hi everyone based on the wage-dataset (wage being the dependent variable) and on the workflow created below, I would like to find out the following:
- What is the predicted
wage
of a person withage
equal to 30 for each piecewise model? - Considering the flexible
pw6_wf_fit
model configuration and in particular the six breakpoints above: Exceeding which (approximate) value ofage
correlates strongest withwage
?
I tried to use versions of extract
but so far I don´t know how to apply it in R. Helpful for any comment
The code I use is the following:
...ANSWER
Answered 2021-Dec-03 at 15:02The answer to the first question is pretty straightforward:
QUESTION
I have a plot with 5 lines that are dashed, 5 that are solid. This is correctly displaying in the plot. However, using the following code, the legend shows all line to be solid. I find this strange, because the legend is showing the correct variation in the line size, which is formatted in the same way. I tried replacing "Factorlevel" = "solid"
by "Factorlevel" = 1
, but this didn't work either.
Please see reproducible example below my code
...ANSWER
Answered 2021-Nov-11 at 01:14You may use theme(legend.key.size = unit(0.5, "in"))
to increase size of legend, that have enough space to dashed line looks like dashed.
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