kddata
    
Home
Book
Videos
Q&A

Sign in | Ask a new question | Sort: by views or by time
Questions: 164 | Resolved: 164 | Answers: 255 | Views : 36262 | Avg time to answer : 1.2 days




117
views
414
days
1
answers
Support Vector Machines and figure 2.15




104
views
427
days
1
answers
Understanding classifier performance




96
views
435
days
1
answers
AUACC vs AUROC curves




117
views
441
days
1
answers
Features in Support Vector Machines




107
views
445
days
2
answers
ICA #19 Solution




107
views
449
days
1
answers
Something forgotten before an important dealine




111
views
454
days
1
answers
Bagged Decision Tree vs. Random Forest




122
views
456
days
3
answers
Do we need to train the model on train+test set again after finding optimal ensemble size?




117
views
474
days
1
answers
Figure 2.8 and equation 2.24




109
views
474
days
1
answers
Double colon?




115
views
474
days
2
answers
Good Predictions




109
views
476
days
2
answers
In binomial likelihood function why is number of trials equal to 1




113
views
476
days
1
answers
The difference between using predict() on BasetableVAL and BasetableTEST




109
views
479
days
1
answers
Creating identical percentages of 1's and 0's efficiently




110
views
480
days
3
answers
Naive Bayes: How can we tell when to tune data?




112
views
483
days
1
answers
Viewing files before reading into R using notepad




111
views
484
days
1
answers
combining rbind and lapply -- the reasoning behind not using them together




121
views
487
days
1
answers
what do you mean when you use the word 'handling'?




121
views
521
days
1
answers
Data Frame subsetted with logical types FALSE, TRUE




135
views
564
days
1
answers
How select the sequence parameter to use in a loop while trying to determine the optimal K for a KNN model




143
views
581
days
1
answers
When do we perform variable selection outside of regression?




167
views
607
days
1
answers
"idf" function




181
views
612
days
1
answers
Second Test Allowed Material Usage




201
views
642
days
1
answers
Test Material Usage




183
views
643
days
1
answers
Defining the classes of columns while reading in data




159
views
650
days
1
answers
How would && operators increase efficiency?




202
views
665
days
2
answers
Viewing Prep Quiz answers




190
views
667
days
1
answers
Viewing of the Solutions to the In-Class Gradable




173
views
672
days
5
answers
Computer Error on the First Prep Quiz




180
views
777
days
1
answers
Cross Validation Optimal Parameter Consistency




172
views
777
days
2
answers
Cross Validation & Wilcoxon Solutions




236
views
782
days
1
answers
Exam length




244
views
782
days
1
answers
Logistic Regression Log Lambda / Coefficients Graph Explanation




212
views
783
days
1
answers
Explain node impurity further




190
views
785
days
2
answers
Requesting a summary of results from Stock Prediction final submission




216
views
787
days
1
answers
Summarizing Cross-Validation Performance Values




202
views
788
days
1
answers
AUC ROC calculation explored




218
views
788
days
1
answers
Comprising a 5x2cfv




190
views
789
days
1
answers
Should I subtract colMeans from my DTM matrix when I am recreating it in the predict function?




188
views
789
days
1
answers
Splitting a Table Without Hardcoding




195
views
790
days
2
answers
New data passed with ensemble of models?




231
views
790
days
2
answers
DATA_GRADING data from 2002 missing




196
views
790
days
2
answers
How to combine multiple models for final submission




193
views
790
days
1
answers
Matching symbols with predictions in the predict function




237
views
790
days
1
answers
Passing variables between functions




189
views
790
days
1
answers
When to install.packages for grader




176
views
790
days
1
answers
columns.txt file in Data Grading folder




172
views
791
days
1
answers
MERGE() command Techniques




200
views
791
days
3
answers
Reading in new data




160
views
793
days
1
answers
Wilcoxon signed-ranks test: Value of parameter "p" in the critical values table




198
views
793
days
1
answers
what does it mean - return indicators




172
views
793
days
1
answers
Wilcoxon assingment




162
views
793
days
1
answers
Deploying the model given by the calibrate function on unbinned or binned data?




199
views
793
days
1
answers
Clarification on Final Code Deliverable




167
views
794
days
1
answers
graphing function takes labels as argument




198
views
794
days
1
answers
What do we do if our calibrated predictions are incorrect?




188
views
794
days
1
answers
Getting a better smoothed fit for plot




194
views
795
days
1
answers
Number of bins for plotting Calibration and bin classifier scores




263
views
795
days
1
answers
Output for 5x2fcv function?




256
views
795
days
7
answers
predKNN Error: "Error in matrix(data = predKNN, ncol = k, nrow = nrow(testKNN)) : non-numeric matrix extent"




191
views
796
days
1
answers
How do we structure a data frame for stacking models?




354
views
796
days
1
answers
WHAT DATA




216
views
796
days
3
answers
Not enough memory to run RF on the Stocks data




356
views
797
days
1
answers
Random Forest error on calibration function




206
views
797
days
1
answers
How to select number of dates in test set




209
views
797
days
1
answers
Choosing a good title




292
views
797
days
1
answers
Text mining after SVD




208
views
798
days
1
answers
Does the Wilcoxon-Ranks Test function need to only work for 10 AUC scores at the .05 level?




241
views
798
days
1
answers
Optimizing bins for calibration




186
views
798
days
1
answers
What's the difference between Predictions and Predictions 2




209
views
799
days
1
answers
Using Random Forest




191
views
799
days
2
answers
The datasets.Rdata file location




217
views
802
days
1
answers
Is it better to delete row of NA's or impute mode?




196
views
802
days
1
answers
yTEST




188
views
802
days
1
answers
Manually Evaluate Neural Network




176
views
802
days
1
answers
NAs in Dataset from Lead Variable




223
views
804
days
2
answers
How to execute R code inside a string variable?




239
views
805
days
1
answers
Big Project Articles Text mining: Merging 2 data sets




204
views
808
days
1
answers
Large assignment question about merging




181
views
809
days
1
answers
Inner merging DF with cardinality of many-to-many




263
views
809
days
1
answers
RandomForest Prediction in Project




193
views
809
days
1
answers
Round 3 Data




198
views
810
days
1
answers
Round 4 Why are there so many unmatched Symbols?




192
views
810
days
1
answers
Optimal Ensemble Size Exercise 2.8.6 for section 2.5.7




184
views
810
days
1
answers
Defining Validation data vs training data




201
views
810
days
3
answers
Tuning in Decision Trees




249
views
810
days
6
answers
Error Received in Decision Tree




203
views
810
days
1
answers
Using the mapping.csv file with Article Data




236
views
811
days
1
answers
Bagged Trees Prediction




188
views
812
days
1
answers
Neural Network Calculation: Entropy Term, etc.




197
views
812
days
3
answers
Determining optimal number of trees - Exercise 2.8.6




203
views
814
days
1
answers
Text mining: how to aggregate unstructured data in Large Assignment News Articles




211
views
816
days
1
answers
submitting LR




300
views
816
days
1
answers
Error from AUC function on KNN algorithm




238
views
816
days
1
answers
GLM/GLMNET Multinomial/Binomial error




298
views
816
days
1
answers
Getting an error when running KNN algorithm on Project




334
views
817
days
10
answers
Error running LR with glmnet




226
views
817
days
1
answers
Difference between BasetableTRAIN, BasetableVAL, BasetableTEST, and BasetableTRAINbig




185
views
820
days
1
answers
Loop with letters instead of numbers




196
views
821
days
1
answers
Independent and dependent variables for predictions




233
views
821
days
1
answers
Leading variable




192
views
821
days
1
answers
How to manually calculate AUC?




217
views
821
days
1
answers
Why use AUC?




212
views
821
days
1
answers
Dependent Variable




226
views
822
days
1
answers
How to manually compute KNN




196
views
822
days
1
answers
Discriminating between neighbors in K-nearest neighbors where distance measures are equal




192
views
823
days
1
answers
Computing Probabilities manually with Bayes Theorem.




253
views
823
days
1
answers
K-Nearest Neighbors "for loop"




217
views
823
days
1
answers
Using NaiveBayes() function that does not have the right criteria




202
views
824
days
2
answers
HW#3 Question 1: Medium Tenure, High Spend




246
views
824
days
1
answers
kNN Calculated Proportions




231
views
824
days
1
answers
What is meant by "Estimation phase: Create a big ensemble with many trees only once"




252
views
824
days
3
answers
Max AUC (bagged trees)




267
views
824
days
4
answers
Create a bagged tree and tune the ensemble size




323
views
824
days
7
answers
Euclidean Distance for K-Nearest Neighbors




233
views
824
days
1
answers
taking Y of the nearest neighbors




209
views
824
days
1
answers
Finding the Optimal # of Trees




211
views
825
days
1
answers
Second intermediate deliverable: predictions




260
views
825
days
2
answers
2.8.4 Exercises for Subsection 2.5.5




194
views
828
days
1
answers
Predicting Probabilities of New (X,Y) Using Naive Bayes




237
views
837
days
2
answers
Threading in R




231
views
837
days
2
answers
AUC




241
views
837
days
3
answers
Predicting Using Naive Bayes




263
views
837
days
1
answers
Lead variable for predictions




216
views
837
days
2
answers
Sorting by stock symbol




229
views
838
days
5
answers
Reading .csv files as Dataframe




211
views
838
days
3
answers
Coaching Marketplace




482
views
838
days
6
answers
Not Enough Distinct Predictions to compute area under ROC.




215
views
839
days
1
answers
What to do if a rm command was used when it shouldn't have been?




220
views
839
days
1
answers
Question sapply about




221
views
839
days
1
answers
kNN.index vs. knn




207
views
839
days
1
answers
kNN in class dependent variable




237
views
839
days
1
answers
Coaching Marketplace: Can coaches meet with different teams?




204
views
839
days
1
answers
First Prediction Wednesday Model




289
views
843
days
1
answers
Meaning of negative AUC (in Round 1 results)




252
views
844
days
1
answers
How do we write the predict function to give predictions for specific stocks?




219
views
844
days
1
answers
How to use validation method on two separate data sets (test data= jan2nd & train data=prev.yr data+jan1st data)




248
views
844
days
3
answers
HW#2: Calculating Second Half of SUBS dataset




356
views
845
days
3
answers
Question about the NYSE dataset for Large Assignment - heavily skewed dependent variable




238
views
846
days
1
answers
Large Assignment: Input / Output and function deliverables




261
views
846
days
1
answers
Prediction Algorithm Output and what it means: If all my predNB values are under 0.50, is it ever guessing "YES?"




292
views
847
days
1
answers
How to use your newly computed v and d to calculate u on the second half of the data?




273
views
847
days
1
answers
Output of the KNN algorithm question -> Prediction or probability




270
views
848
days
3
answers
Warning in install.packages : package ‘impute’ is not available (for R version 3.2.3)




232
views
848
days
1
answers
What is the purpose of svd?




391
views
849
days
3
answers
R error: infinite or missing values in 'x' when running svd(subs_mat)




229
views
851
days
1
answers
Breaking a "tie" for K-nearest neighbors




220
views
851
days
1
answers
Why do we sometimes use the transpose function back to back, and how do we recognize when it is appropriate to do so?




249
views
851
days
1
answers
How to manually compute proportions of 1s using k nearest neighbors in R?




195
views
852
days
1
answers
What is the significance of document vector weighting?




242
views
852
days
1
answers
What is the response variable for the Group Stock Price Project?




400
views
870
days
1
answers
Large Graded Partner Assignment Question




252
views
873
days
1
answers
Can you please clarify what you are asking for when you want predictors from 5 columns?




213
views
873
days
1
answers
Homework due dates




211
views
873
days
1
answers
How to combine two functions with differing outputs and equations?




278
views
873
days
1
answers
How to compute a lag on a variable?




266
views
873
days
1
answers
Best Way to Attempt Homework




266
views
874
days
1
answers
did you mean to say flag or lag in the exercise?




216
views
874
days
1
answers
What does putting "as." in front of numeric or factor accomplish?




253
views
874
days
1
answers
What is the difference between characters, numerics, factors, and integers?




286
views
875
days
1
answers
How to compute the time window in model deployment?




308
views
878
days
4
answers
How to keep the same structure of a data frame when appying functions to it?




338
views
878
days
1
answers
Can you clarify the following statement: Compute the the sum by both ID1 and ID2 ? -HW1 Exercise4 (due 2/1)-




524
views
878
days
4
answers
Error: undefined columns selected, when running dummy(x)