kddata
Home
Book
Videos
Q&A

Sign in | Ask a new question | Sort: by views or by time
Questions: 170 | Resolved: 170 | Answers: 263 | Views : 80369 | Avg time to answer : 3.9 days




38506
views
937
days
1
answers
Getting an error when running KNN algorithm on Project




593
views
999
days
4
answers
Error: undefined columns selected, when running dummy(x)




544
views
959
days
6
answers
Not Enough Distinct Predictions to compute area under ROC.




500
views
969
days
3
answers
R error: infinite or missing values in 'x' when running svd(subs_mat)




488
views
943
days
1
answers
How to manually compute KNN




447
views
938
days
10
answers
Error running LR with glmnet




435
views
991
days
1
answers
Large Graded Partner Assignment Question




434
views
918
days
1
answers
Random Forest error on calibration function




397
views
937
days
1
answers
Error from AUC function on KNN algorithm




391
views
966
days
3
answers
Question about the NYSE dataset for Large Assignment - heavily skewed dependent variable




383
views
917
days
1
answers
WHAT DATA




364
views
999
days
1
answers
Can you clarify the following statement: Compute the the sum by both ID1 and ID2 ? -HW1 Exercise4 (due 2/1)-




355
views
945
days
7
answers
Euclidean Distance for K-Nearest Neighbors




336
views
999
days
4
answers
How to keep the same structure of a data frame when appying functions to it?




319
views
918
days
1
answers
Text mining after SVD




317
views
968
days
1
answers
How to use your newly computed v and d to calculate u on the second half of the data?




312
views
964
days
1
answers
Meaning of negative AUC (in Round 1 results)




307
views
996
days
1
answers
How to compute the time window in model deployment?




300
views
994
days
1
answers
How to compute a lag on a variable?




296
views
994
days
1
answers
Best Way to Attempt Homework




296
views
968
days
1
answers
Output of the KNN algorithm question -> Prediction or probability




296
views
969
days
3
answers
Warning in install.packages : package ‘impute’ is not available (for R version 3.2.3)




291
views
995
days
1
answers
did you mean to say flag or lag in the exercise?




291
views
958
days
1
answers
Lead variable for predictions




290
views
945
days
4
answers
Create a bagged tree and tune the ensemble size




289
views
916
days
7
answers
predKNN Error: "Error in matrix(data = predKNN, ncol = k, nrow = nrow(testKNN)) : non-numeric matrix extent"




287
views
967
days
1
answers
Prediction Algorithm Output and what it means: If all my predNB values are under 0.50, is it ever guessing "YES?"




287
views
930
days
1
answers
RandomForest Prediction in Project




286
views
995
days
1
answers
What is the difference between characters, numerics, factors, and integers?




285
views
937
days
1
answers
GLM/GLMNET Multinomial/Binomial error




284
views
931
days
6
answers
Error Received in Decision Tree




284
views
916
days
1
answers
Output for 5x2fcv function?




282
views
946
days
2
answers
2.8.4 Exercises for Subsection 2.5.5




278
views
994
days
1
answers
Can you please clarify what you are asking for when you want predictors from 5 columns?




276
views
945
days
3
answers
Max AUC (bagged trees)




275
views
944
days
1
answers
K-Nearest Neighbors "for loop"




273
views
965
days
3
answers
HW#2: Calculating Second Half of SUBS dataset




272
views
965
days
1
answers
How do we write the predict function to give predictions for specific stocks?




271
views
903
days
1
answers
Logistic Regression Log Lambda / Coefficients Graph Explanation




270
views
972
days
1
answers
How to manually compute proportions of 1s using k nearest neighbors in R?




269
views
945
days
1
answers
kNN Calculated Proportions




268
views
919
days
1
answers
Optimizing bins for calibration




265
views
960
days
1
answers
Coaching Marketplace: Can coaches meet with different teams?




264
views
958
days
3
answers
Predicting Using Naive Bayes




263
views
967
days
1
answers
Large Assignment: Input / Output and function deliverables




261
views
973
days
1
answers
What is the response variable for the Group Stock Price Project?




260
views
958
days
2
answers
Threading in R




260
views
932
days
1
answers
Bagged Trees Prediction




258
views
911
days
1
answers
Passing variables between functions




258
views
926
days
1
answers
Big Project Articles Text mining: Merging 2 data sets




257
views
941
days
1
answers
Leading variable




256
views
903
days
1
answers
Exam length




255
views
958
days
2
answers
AUC




254
views
945
days
1
answers
taking Y of the nearest neighbors




254
views
911
days
2
answers
DATA_GRADING data from 2002 missing




252
views
969
days
1
answers
What is the purpose of svd?




250
views
945
days
1
answers
What is meant by "Estimation phase: Create a big ensemble with many trees only once"




249
views
959
days
5
answers
Reading .csv files as Dataframe




248
views
972
days
1
answers
Breaking a "tie" for K-nearest neighbors




248
views
960
days
1
answers
Question sapply about




246
views
925
days
2
answers
How to execute R code inside a string variable?




243
views
972
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?




243
views
938
days
1
answers
Difference between BasetableTRAIN, BasetableVAL, BasetableTEST, and BasetableTRAINbig




240
views
908
days
1
answers
Summarizing Cross-Validation Performance Values




239
views
965
days
1
answers
How to use validation method on two separate data sets (test data= jan2nd & train data=prev.yr data+jan1st data)




239
views
960
days
1
answers
kNN.index vs. knn




239
views
909
days
1
answers
Comprising a 5x2cfv




238
views
958
days
2
answers
Sorting by stock symbol




238
views
942
days
1
answers
Why use AUC?




237
views
995
days
1
answers
What does putting "as." in front of numeric or factor accomplish?




237
views
923
days
1
answers
Is it better to delete row of NA's or impute mode?




237
views
917
days
3
answers
Not enough memory to run RF on the Stocks data




237
views
960
days
1
answers
What to do if a rm command was used when it shouldn't have been?




236
views
904
days
1
answers
Explain node impurity further




234
views
942
days
1
answers
Dependent Variable




234
views
944
days
1
answers
Using NaiveBayes() function that does not have the right criteria




233
views
994
days
1
answers
Homework due dates




232
views
994
days
1
answers
How to combine two functions with differing outputs and equations?




230
views
946
days
1
answers
Second intermediate deliverable: predictions




230
views
918
days
1
answers
How to select number of dates in test set




230
views
918
days
1
answers
Choosing a good title




230
views
929
days
1
answers
Large assignment question about merging




230
views
935
days
1
answers
Text mining: how to aggregate unstructured data in Large Assignment News Articles




229
views
937
days
1
answers
submitting LR




229
views
959
days
3
answers
Coaching Marketplace




229
views
945
days
1
answers
Finding the Optimal # of Trees




228
views
919
days
1
answers
Does the Wilcoxon-Ranks Test function need to only work for 10 AUC scores at the .05 level?




226
views
763
days
1
answers
Test Material Usage




225
views
920
days
1
answers
Using Random Forest




224
views
931
days
1
answers
Using the mapping.csv file with Article Data




224
views
960
days
1
answers
kNN in class dependent variable




224
views
960
days
1
answers
First Prediction Wednesday Model




223
views
945
days
2
answers
HW#3 Question 1: Medium Tenure, High Spend




223
views
909
days
1
answers
AUC ROC calculation explored




223
views
786
days
2
answers
Viewing Prep Quiz answers




222
views
912
days
3
answers
Reading in new data




220
views
931
days
3
answers
Tuning in Decision Trees




219
views
931
days
1
answers
Round 4 Why are there so many unmatched Symbols?




219
views
943
days
1
answers
Discriminating between neighbors in K-nearest neighbors where distance measures are equal




218
views
914
days
1
answers
Clarification on Final Code Deliverable




217
views
910
days
2
answers
New data passed with ensemble of models?




216
views
914
days
1
answers
what does it mean - return indicators




216
views
915
days
1
answers
What do we do if our calibrated predictions are incorrect?




215
views
923
days
1
answers
yTEST




215
views
911
days
2
answers
How to combine multiple models for final submission




215
views
973
days
1
answers
What is the significance of document vector weighting?




215
views
941
days
1
answers
Independent and dependent variables for predictions




215
views
933
days
3
answers
Determining optimal number of trees - Exercise 2.8.6




215
views
788
days
1
answers
Viewing of the Solutions to the In-Class Gradable




214
views
911
days
1
answers
Matching symbols with predictions in the predict function




213
views
916
days
1
answers
Number of bins for plotting Calibration and bin classifier scores




212
views
942
days
1
answers
How to manually calculate AUC?




211
views
920
days
2
answers
The datasets.Rdata file location




211
views
949
days
1
answers
Predicting Probabilities of New (X,Y) Using Naive Bayes




211
views
930
days
1
answers
Round 3 Data




210
views
931
days
1
answers
Optimal Ensemble Size Exercise 2.8.6 for section 2.5.7




210
views
944
days
1
answers
Computing Probabilities manually with Bayes Theorem.




210
views
911
days
1
answers
When to install.packages for grader




209
views
906
days
2
answers
Requesting a summary of results from Stock Prediction final submission




209
views
764
days
1
answers
Defining the classes of columns while reading in data




208
views
917
days
1
answers
How do we structure a data frame for stacking models?




208
views
923
days
1
answers
Manually Evaluate Neural Network




208
views
910
days
1
answers
Should I subtract colMeans from my DTM matrix when I am recreating it in the predict function?




207
views
910
days
1
answers
Splitting a Table Without Hardcoding




207
views
933
days
1
answers
Neural Network Calculation: Entropy Term, etc.




205
views
733
days
1
answers
Second Test Allowed Material Usage




204
views
941
days
1
answers
Loop with letters instead of numbers




204
views
915
days
1
answers
Getting a better smoothed fit for plot




202
views
931
days
1
answers
Defining Validation data vs training data




202
views
919
days
1
answers
What's the difference between Predictions and Predictions 2




201
views
930
days
1
answers
Inner merging DF with cardinality of many-to-many




200
views
898
days
1
answers
Cross Validation Optimal Parameter Consistency




200
views
608
days
3
answers
what do you mean when you use the word 'handling'?




195
views
912
days
1
answers
MERGE() command Techniques




194
views
793
days
5
answers
Computer Error on the First Prep Quiz




194
views
923
days
1
answers
NAs in Dataset from Lead Variable




193
views
911
days
1
answers
columns.txt file in Data Grading folder




192
views
898
days
2
answers
Cross Validation & Wilcoxon Solutions




189
views
914
days
1
answers
Wilcoxon assingment




188
views
728
days
1
answers
"idf" function




185
views
915
days
1
answers
graphing function takes labels as argument




181
views
914
days
1
answers
Deploying the model given by the calibrate function on unbinned or binned data?




181
views
914
days
1
answers
Wilcoxon signed-ranks test: Value of parameter "p" in the critical values table




180
views
771
days
1
answers
How would && operators increase efficiency?




162
views
702
days
1
answers
When do we perform variable selection outside of regression?




155
views
685
days
1
answers
How select the sequence parameter to use in a loop while trying to determine the optimal K for a KNN model




142
views
577
days
3
answers
Do we need to train the model on train+test set again after finding optimal ensemble size?




141
views
642
days
1
answers
Data Frame subsetted with logical types FALSE, TRUE




141
views
535
days
1
answers
Support Vector Machines and figure 2.15




140
views
562
days
1
answers
Features in Support Vector Machines




137
views
595
days
1
answers
Figure 2.8 and equation 2.24




134
views
595
days
2
answers
Good Predictions




134
views
601
days
3
answers
Naive Bayes: How can we tell when to tune data?




133
views
597
days
1
answers
The difference between using predict() on BasetableVAL and BasetableTEST




133
views
604
days
1
answers
Viewing files before reading into R using notepad




133
views
575
days
1
answers
Bagged Decision Tree vs. Random Forest




131
views
605
days
1
answers
combining rbind and lapply -- the reasoning behind not using them together




130
views
597
days
2
answers
In binomial likelihood function why is number of trials equal to 1




129
views
566
days
2
answers
ICA #19 Solution




128
views
595
days
1
answers
Double colon?




128
views
600
days
1
answers
Creating identical percentages of 1's and 0's efficiently




127
views
570
days
1
answers
Something forgotten before an important dealine




124
views
548
days
1
answers
Understanding classifier performance




116
views
556
days
1
answers
AUACC vs AUROC curves




13
views
82
days
0
answers





13
views
82
days
0
answers





11
views
82
days
0
answers





9
views
82
days
0
answers





8
views
82
days
0
answers





8
views
82
days
0
answers