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Questions: 170

Resolved: 170

Answers: 263

Views : 85147

Avg time to answer : 6.7 days
38585
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1023
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1
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Getting an error when running KNN algorithm on Project
628
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1045
days
6
answers
Not Enough Distinct Predictions to compute area under ROC.
627
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1084
days
4
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Error: undefined columns selected, when running dummy(x)
549
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1055
days
3
answers
R error: infinite or missing values in 'x' when running svd(subs_mat)
516
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1028
days
1
answers
How to manually compute KNN
499
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1024
days
10
answers
Error running LR with glmnet
487
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1003
days
1
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Random Forest error on calibration function
469
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1022
days
1
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Error from AUC function on KNN algorithm
466
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1077
days
1
answers
Large Graded Partner Assignment Question
415
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1052
days
3
answers
Question about the NYSE dataset for Large Assignment  heavily skewed dependent variable
411
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1002
days
1
answers
WHAT DATA
394
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1084
days
1
answers
Can you clarify the following statement: Compute the the sum by both ID1 and ID2 ? HW1 Exercise4 (due 2/1)
389
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1031
days
7
answers
Euclidean Distance for KNearest Neighbors
380
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1022
days
1
answers
GLM/GLMNET Multinomial/Binomial error
369
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1084
days
4
answers
How to keep the same structure of a data frame when appying functions to it?
354
views
1004
days
1
answers
Text mining after SVD
342
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1053
days
1
answers
How to use your newly computed v and d to calculate u on the second half of the data?
339
views
1050
days
1
answers
Meaning of negative AUC (in Round 1 results)
336
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1017
days
6
answers
Error Received in Decision Tree
335
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1081
days
1
answers
How to compute the time window in model deployment?
332
views
1080
days
1
answers
How to compute a lag on a variable?
328
views
1080
days
1
answers
Best Way to Attempt Homework
326
views
1002
days
7
answers
predKNN Error: "Error in matrix(data = predKNN, ncol = k, nrow = nrow(testKNN)) : nonnumeric matrix extent"
324
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1053
days
1
answers
Output of the KNN algorithm question > Prediction or probability
324
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1054
days
3
answers
Warning in install.packages : package â€˜imputeâ€™ is not available (for R version 3.2.3)
322
views
1080
days
1
answers
What is the difference between characters, numerics, factors, and integers?
320
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1016
days
1
answers
RandomForest Prediction in Project
320
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1030
days
4
answers
Create a bagged tree and tune the ensemble size
316
views
1080
days
1
answers
did you mean to say flag or lag in the exercise?
315
views
1043
days
1
answers
Lead variable for predictions
313
views
1052
days
1
answers
Prediction Algorithm Output and what it means: If all my predNB values are under 0.50, is it ever guessing "YES?"
310
views
1002
days
1
answers
Output for 5x2fcv function?
310
views
1031
days
2
answers
2.8.4 Exercises for Subsection 2.5.5
307
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1079
days
1
answers
Can you please clarify what you are asking for when you want predictors from 5 columns?
305
views
1030
days
3
answers
Max AUC (bagged trees)
304
views
1030
days
1
answers
KNearest Neighbors "for loop"
303
views
1050
days
1
answers
How do we write the predict function to give predictions for specific stocks?
302
views
989
days
1
answers
Logistic Regression Log Lambda / Coefficients Graph Explanation
301
views
1050
days
3
answers
HW#2: Calculating Second Half of SUBS dataset
301
views
1057
days
1
answers
How to manually compute proportions of 1s using k nearest neighbors in R?
298
views
1004
days
1
answers
Optimizing bins for calibration
294
views
1030
days
1
answers
kNN Calculated Proportions
294
views
1045
days
1
answers
Coaching Marketplace: Can coaches meet with different teams?
292
views
1052
days
1
answers
Large Assignment: Input / Output and function deliverables
291
views
1043
days
3
answers
Predicting Using Naive Bayes
289
views
1043
days
2
answers
Threading in R
287
views
1059
days
1
answers
What is the response variable for the Group Stock Price Project?
286
views
996
days
1
answers
Passing variables between functions
286
views
1012
days
1
answers
Big Project Articles Text mining: Merging 2 data sets
285
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1017
days
1
answers
Bagged Trees Prediction
284
views
1027
days
1
answers
Leading variable
283
views
1043
days
2
answers
AUC
282
views
1054
days
1
answers
What is the purpose of svd?
280
views
1031
days
1
answers
taking Y of the nearest neighbors
280
views
988
days
1
answers
Exam length
277
views
996
days
2
answers
DATA_GRADING data from 2002 missing
277
views
1045
days
1
answers
Question sapply about
276
views
994
days
1
answers
Summarizing CrossValidation Performance Values
276
views
1030
days
1
answers
What is meant by "Estimation phase: Create a big ensemble with many trees only once"
275
views
1044
days
5
answers
Reading .csv files as Dataframe
272
views
1057
days
1
answers
Breaking a "tie" for Knearest neighbors
270
views
1010
days
2
answers
How to execute R code inside a string variable?
269
views
994
days
1
answers
Comprising a 5x2cfv
268
views
1024
days
1
answers
Difference between BasetableTRAIN, BasetableVAL, BasetableTEST, and BasetableTRAINbig
266
views
1057
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?
265
views
1045
days
1
answers
What to do if a rm command was used when it shouldn't have been?
264
views
1027
days
1
answers
Why use AUC?
263
views
1027
days
1
answers
Dependent Variable
263
views
1050
days
1
answers
How to use validation method on two separate data sets (test data= jan2nd & train data=prev.yr data+jan1st data)
262
views
1045
days
1
answers
kNN.index vs. knn
261
views
1002
days
3
answers
Not enough memory to run RF on the Stocks data
260
views
1080
days
1
answers
What does putting "as." in front of numeric or factor accomplish?
260
views
990
days
1
answers
Explain node impurity further
259
views
1043
days
2
answers
Sorting by stock symbol
258
views
1080
days
1
answers
How to combine two functions with differing outputs and equations?
257
views
1030
days
1
answers
Using NaiveBayes() function that does not have the right criteria
257
views
848
days
1
answers
Test Material Usage
257
views
1079
days
1
answers
Homework due dates
257
views
1008
days
1
answers
Is it better to delete row of NA's or impute mode?
257
views
1004
days
1
answers
How to select number of dates in test set
256
views
1014
days
1
answers
Large assignment question about merging
256
views
1004
days
1
answers
Choosing a good title
254
views
1021
days
1
answers
Text mining: how to aggregate unstructured data in Large Assignment News Articles
253
views
871
days
2
answers
Viewing Prep Quiz answers
252
views
1004
days
1
answers
Does the WilcoxonRanks Test function need to only work for 10 AUC scores at the .05 level?
252
views
1022
days
1
answers
submitting LR
252
views
1031
days
1
answers
Finding the Optimal # of Trees
252
views
1031
days
1
answers
Second intermediate deliverable: predictions
251
views
1045
days
3
answers
Coaching Marketplace
250
views
1017
days
1
answers
Using the mapping.csv file with Article Data
249
views
1030
days
2
answers
HW#3 Question 1: Medium Tenure, High Spend
249
views
994
days
1
answers
AUC ROC calculation explored
248
views
997
days
3
answers
Reading in new data
248
views
1005
days
1
answers
Using Random Forest
246
views
1045
days
1
answers
First Prediction Wednesday Model
246
views
1028
days
1
answers
Discriminating between neighbors in Knearest neighbors where distance measures are equal
245
views
1045
days
1
answers
kNN in class dependent variable
244
views
996
days
2
answers
How to combine multiple models for final submission
242
views
849
days
1
answers
Defining the classes of columns while reading in data
242
views
999
days
1
answers
what does it mean  return indicators
242
views
1017
days
3
answers
Tuning in Decision Trees
241
views
874
days
1
answers
Viewing of the Solutions to the InClass Gradable
241
views
1016
days
1
answers
Round 4 Why are there so many unmatched Symbols?
241
views
996
days
2
answers
New data passed with ensemble of models?
241
views
999
days
1
answers
Clarification on Final Code Deliverable
240
views
1027
days
1
answers
Independent and dependent variables for predictions
240
views
1058
days
1
answers
What is the significance of document vector weighting?
239
views
996
days
1
answers
When to install.packages for grader
239
views
1019
days
3
answers
Determining optimal number of trees  Exercise 2.8.6
239
views
1008
days
1
answers
yTEST
238
views
991
days
2
answers
Requesting a summary of results from Stock Prediction final submission
238
views
996
days
1
answers
Matching symbols with predictions in the predict function
237
views
1035
days
1
answers
Predicting Probabilities of New (X,Y) Using Naive Bayes
237
views
1000
days
1
answers
What do we do if our calibrated predictions are incorrect?
237
views
1016
days
1
answers
Round 3 Data
237
views
1008
days
1
answers
Manually Evaluate Neural Network
235
views
1027
days
1
answers
How to manually calculate AUC?
235
views
995
days
1
answers
Should I subtract colMeans from my DTM matrix when I am recreating it in the predict function?
234
views
1005
days
2
answers
The datasets.Rdata file location
234
views
1030
days
1
answers
Computing Probabilities manually with Bayes Theorem.
233
views
1001
days
1
answers
Number of bins for plotting Calibration and bin classifier scores
233
views
1016
days
1
answers
Optimal Ensemble Size Exercise 2.8.6 for section 2.5.7
233
views
818
days
1
answers
Second Test Allowed Material Usage
232
views
1019
days
1
answers
Neural Network Calculation: Entropy Term, etc.
232
views
996
days
1
answers
Splitting a Table Without Hardcoding
231
views
1002
days
1
answers
How do we structure a data frame for stacking models?
228
views
1016
days
1
answers
Defining Validation data vs training data
227
views
1026
days
1
answers
Loop with letters instead of numbers
227
views
1001
days
1
answers
Getting a better smoothed fit for plot
227
views
1005
days
1
answers
What's the difference between Predictions and Predictions 2
227
views
693
days
3
answers
what do you mean when you use the word 'handling'?
227
views
983
days
1
answers
Cross Validation Optimal Parameter Consistency
225
views
1015
days
1
answers
Inner merging DF with cardinality of manytomany
222
views
997
days
1
answers
MERGE() command Techniques
221
views
878
days
5
answers
Computer Error on the First Prep Quiz
220
views
996
days
1
answers
columns.txt file in Data Grading folder
219
views
813
days
1
answers
"idf" function
218
views
983
days
2
answers
Cross Validation & Wilcoxon Solutions
218
views
1009
days
1
answers
NAs in Dataset from Lead Variable
212
views
999
days
1
answers
Wilcoxon assingment
211
views
999
days
1
answers
Wilcoxon signedranks test: Value of parameter "p" in the critical values table
209
views
856
days
1
answers
How would && operators increase efficiency?
207
views
1000
days
1
answers
graphing function takes labels as argument
203
views
999
days
1
answers
Deploying the model given by the calibrate function on unbinned or binned data?
187
views
787
days
1
answers
When do we perform variable selection outside of regression?
183
views
770
days
1
answers
How select the sequence parameter to use in a loop while trying to determine the optimal K for a KNN model
172
views
727
days
1
answers
Data Frame subsetted with logical types FALSE, TRUE
169
views
647
days
1
answers
Features in Support Vector Machines
169
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621
days
1
answers
Support Vector Machines and figure 2.15
168
views
662
days
3
answers
Do we need to train the model on train+test set again after finding optimal ensemble size?
163
views
680
days
1
answers
Figure 2.8 and equation 2.24
162
views
680
days
2
answers
Good Predictions
160
views
686
days
3
answers
Naive Bayes: How can we tell when to tune data?
160
views
660
days
1
answers
Bagged Decision Tree vs. Random Forest
159
views
682
days
2
answers
In binomial likelihood function why is number of trials equal to 1
158
views
682
days
1
answers
The difference between using predict() on BasetableVAL and BasetableTEST
157
views
689
days
1
answers
Viewing files before reading into R using notepad
157
views
680
days
1
answers
Double colon?
156
views
651
days
2
answers
ICA #19 Solution
154
views
685
days
1
answers
Creating identical percentages of 1's and 0's efficiently
154
views
656
days
1
answers
Something forgotten before an important dealine
154
views
690
days
1
answers
combining rbind and lapply  the reasoning behind not using them together
150
views
633
days
1
answers
Understanding classifier performance
141
views
641
days
1
answers
AUACC vs AUROC curves
41
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167
days
0
answers
41
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167
days
0
answers
28
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167
days
0
answers
27
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167
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0
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26
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167
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0
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24
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167
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0
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