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Questions: 170

Resolved: 170

Answers: 263

Views : 80370

Avg time to answer : 3.9 days
38506
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937
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1
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Getting an error when running KNN algorithm on Project
593
views
999
days
4
answers
Error: undefined columns selected, when running dummy(x)
544
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959
days
6
answers
Not Enough Distinct Predictions to compute area under ROC.
500
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969
days
3
answers
R error: infinite or missing values in 'x' when running svd(subs_mat)
488
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943
days
1
answers
How to manually compute KNN
447
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938
days
10
answers
Error running LR with glmnet
435
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991
days
1
answers
Large Graded Partner Assignment Question
434
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918
days
1
answers
Random Forest error on calibration function
397
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937
days
1
answers
Error from AUC function on KNN algorithm
391
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966
days
3
answers
Question about the NYSE dataset for Large Assignment  heavily skewed dependent variable
383
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917
days
1
answers
WHAT DATA
364
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999
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1
answers
Can you clarify the following statement: Compute the the sum by both ID1 and ID2 ? HW1 Exercise4 (due 2/1)
355
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945
days
7
answers
Euclidean Distance for KNearest Neighbors
336
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999
days
4
answers
How to keep the same structure of a data frame when appying functions to it?
319
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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
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968
days
1
answers
Output of the KNN algorithm question > Prediction or probability
296
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969
days
3
answers
Warning in install.packages : package â€˜imputeâ€™ 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
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916
days
7
answers
predKNN Error: "Error in matrix(data = predKNN, ncol = k, nrow = nrow(testKNN)) : nonnumeric matrix extent"
287
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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
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931
days
6
answers
Error Received in Decision Tree
284
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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
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945
days
3
answers
Max AUC (bagged trees)
275
views
944
days
1
answers
KNearest 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
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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 Knearest 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 CrossValidation 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 WilcoxonRanks 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
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943
days
1
answers
Discriminating between neighbors in Knearest 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 InClass 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 manytomany
201
views
608
days
3
answers
what do you mean when you use the word 'handling'?
200
views
898
days
1
answers
Cross Validation Optimal Parameter Consistency
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 signedranks 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
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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
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562
days
1
answers
Features in Support Vector Machines
137
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595
days
1
answers
Figure 2.8 and equation 2.24
134
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595
days
2
answers
Good Predictions
134
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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
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595
days
1
answers
Double colon?
128
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600
days
1
answers
Creating identical percentages of 1's and 0's efficiently
127
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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
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82
days
0
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13
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82
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11
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82
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9
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82
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8
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8
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82
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