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Questions: 170

Resolved: 170

Answers: 263

Views : 83948

Avg time to answer : 5.6 days
21
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131
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22
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33
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131
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160
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584
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Support Vector Machines and figure 2.15
144
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597
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Understanding classifier performance
135
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605
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1
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AUACC vs AUROC curves
161
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611
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Features in Support Vector Machines
148
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615
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2
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ICA #19 Solution
146
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619
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Something forgotten before an important dealine
154
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624
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1
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Bagged Decision Tree vs. Random Forest
163
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626
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3
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Do we need to train the model on train+test set again after finding optimal ensemble size?
157
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644
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1
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Figure 2.8 and equation 2.24
152
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644
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Double colon?
159
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644
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2
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Good Predictions
154
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646
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2
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In binomial likelihood function why is number of trials equal to 1
153
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646
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1
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The difference between using predict() on BasetableVAL and BasetableTEST
149
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649
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1
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Creating identical percentages of 1's and 0's efficiently
155
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650
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3
answers
Naive Bayes: How can we tell when to tune data?
150
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653
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1
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Viewing files before reading into R using notepad
148
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654
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1
answers
combining rbind and lapply  the reasoning behind not using them together
222
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657
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3
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what do you mean when you use the word 'handling'?
164
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691
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1
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Data Frame subsetted with logical types FALSE, TRUE
176
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734
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1
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How select the sequence parameter to use in a loop while trying to determine the optimal K for a KNN model
182
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751
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1
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When do we perform variable selection outside of regression?
210
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777
days
1
answers
"idf" function
226
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782
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1
answers
Second Test Allowed Material Usage
250
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812
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1
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Test Material Usage
234
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813
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1
answers
Defining the classes of columns while reading in data
202
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820
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1
answers
How would && operators increase efficiency?
245
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835
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2
answers
Viewing Prep Quiz answers
235
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837
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1
answers
Viewing of the Solutions to the InClass Gradable
212
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842
days
5
answers
Computer Error on the First Prep Quiz
222
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947
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1
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Cross Validation Optimal Parameter Consistency
211
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947
days
2
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Cross Validation & Wilcoxon Solutions
276
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952
days
1
answers
Exam length
293
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952
days
1
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Logistic Regression Log Lambda / Coefficients Graph Explanation
254
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953
days
1
answers
Explain node impurity further
229
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955
days
2
answers
Requesting a summary of results from Stock Prediction final submission
271
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957
days
1
answers
Summarizing CrossValidation Performance Values
244
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958
days
1
answers
AUC ROC calculation explored
262
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958
days
1
answers
Comprising a 5x2cfv
230
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959
days
1
answers
Should I subtract colMeans from my DTM matrix when I am recreating it in the predict function?
226
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959
days
1
answers
Splitting a Table Without Hardcoding
236
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960
days
2
answers
New data passed with ensemble of models?
272
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960
days
2
answers
DATA_GRADING data from 2002 missing
236
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960
days
2
answers
How to combine multiple models for final submission
232
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960
days
1
answers
Matching symbols with predictions in the predict function
279
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960
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1
answers
Passing variables between functions
231
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960
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1
answers
When to install.packages for grader
213
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960
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1
answers
columns.txt file in Data Grading folder
215
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961
days
1
answers
MERGE() command Techniques
241
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961
days
3
answers
Reading in new data
205
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963
days
1
answers
Wilcoxon signedranks test: Value of parameter "p" in the critical values table
237
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963
days
1
answers
what does it mean  return indicators
206
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963
days
1
answers
Wilcoxon assingment
198
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963
days
1
answers
Deploying the model given by the calibrate function on unbinned or binned data?
234
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963
days
1
answers
Clarification on Final Code Deliverable
202
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964
days
1
answers
graphing function takes labels as argument
233
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964
days
1
answers
What do we do if our calibrated predictions are incorrect?
222
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964
days
1
answers
Getting a better smoothed fit for plot
229
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965
days
1
answers
Number of bins for plotting Calibration and bin classifier scores
304
views
965
days
1
answers
Output for 5x2fcv function?
316
views
965
days
7
answers
predKNN Error: "Error in matrix(data = predKNN, ncol = k, nrow = nrow(testKNN)) : nonnumeric matrix extent"
226
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966
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1
answers
How do we structure a data frame for stacking models?
404
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966
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1
answers
WHAT DATA
254
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966
days
3
answers
Not enough memory to run RF on the Stocks data
476
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967
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1
answers
Random Forest error on calibration function
251
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967
days
1
answers
How to select number of dates in test set
250
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967
days
1
answers
Choosing a good title
344
views
967
days
1
answers
Text mining after SVD
246
views
968
days
1
answers
Does the WilcoxonRanks Test function need to only work for 10 AUC scores at the .05 level?
291
views
968
days
1
answers
Optimizing bins for calibration
220
views
968
days
1
answers
What's the difference between Predictions and Predictions 2
243
views
969
days
1
answers
Using Random Forest
226
views
969
days
2
answers
The datasets.Rdata file location
252
views
972
days
1
answers
Is it better to delete row of NA's or impute mode?
233
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972
days
1
answers
yTEST
229
views
972
days
1
answers
Manually Evaluate Neural Network
212
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972
days
1
answers
NAs in Dataset from Lead Variable
264
views
974
days
2
answers
How to execute R code inside a string variable?
278
views
975
days
1
answers
Big Project Articles Text mining: Merging 2 data sets
249
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978
days
1
answers
Large assignment question about merging
219
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979
days
1
answers
Inner merging DF with cardinality of manytomany
310
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979
days
1
answers
RandomForest Prediction in Project
230
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979
days
1
answers
Round 3 Data
235
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980
days
1
answers
Round 4 Why are there so many unmatched Symbols?
227
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980
days
1
answers
Optimal Ensemble Size Exercise 2.8.6 for section 2.5.7
219
views
980
days
1
answers
Defining Validation data vs training data
236
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980
days
3
answers
Tuning in Decision Trees
323
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980
days
6
answers
Error Received in Decision Tree
242
views
980
days
1
answers
Using the mapping.csv file with Article Data
277
views
981
days
1
answers
Bagged Trees Prediction
226
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982
days
1
answers
Neural Network Calculation: Entropy Term, etc.
234
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982
days
3
answers
Determining optimal number of trees  Exercise 2.8.6
247
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984
days
1
answers
Text mining: how to aggregate unstructured data in Large Assignment News Articles
247
views
986
days
1
answers
submitting LR
450
views
986
days
1
answers
Error from AUC function on KNN algorithm
355
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986
days
1
answers
GLM/GLMNET Multinomial/Binomial error
38560
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986
days
1
answers
Getting an error when running KNN algorithm on Project
487
views
987
days
10
answers
Error running LR with glmnet
263
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987
days
1
answers
Difference between BasetableTRAIN, BasetableVAL, BasetableTEST, and BasetableTRAINbig
222
views
990
days
1
answers
Loop with letters instead of numbers
234
views
991
days
1
answers
Independent and dependent variables for predictions
277
views
991
days
1
answers
Leading variable
229
views
991
days
1
answers
How to manually calculate AUC?
258
views
991
days
1
answers
Why use AUC?
253
views
991
days
1
answers
Dependent Variable
507
views
992
days
1
answers
How to manually compute KNN
240
views
992
days
1
answers
Discriminating between neighbors in Knearest neighbors where distance measures are equal
228
views
993
days
1
answers
Computing Probabilities manually with Bayes Theorem.
297
views
993
days
1
answers
KNearest Neighbors "for loop"
252
views
993
days
1
answers
Using NaiveBayes() function that does not have the right criteria
241
views
994
days
2
answers
HW#3 Question 1: Medium Tenure, High Spend
287
views
994
days
1
answers
kNN Calculated Proportions
270
views
994
days
1
answers
What is meant by "Estimation phase: Create a big ensemble with many trees only once"
298
views
994
days
3
answers
Max AUC (bagged trees)
312
views
994
days
4
answers
Create a bagged tree and tune the ensemble size
380
views
994
days
7
answers
Euclidean Distance for KNearest Neighbors
276
views
994
days
1
answers
taking Y of the nearest neighbors
246
views
995
days
1
answers
Finding the Optimal # of Trees
247
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995
days
1
answers
Second intermediate deliverable: predictions
303
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995
days
2
answers
2.8.4 Exercises for Subsection 2.5.5
231
views
998
days
1
answers
Predicting Probabilities of New (X,Y) Using Naive Bayes
279
views
1007
days
2
answers
Threading in R
276
views
1007
days
2
answers
AUC
287
views
1007
days
3
answers
Predicting Using Naive Bayes
308
views
1007
days
1
answers
Lead variable for predictions
255
views
1007
days
2
answers
Sorting by stock symbol
267
views
1008
days
5
answers
Reading .csv files as Dataframe
245
views
1008
days
3
answers
Coaching Marketplace
610
views
1008
days
6
answers
Not Enough Distinct Predictions to compute area under ROC.
258
views
1009
days
1
answers
What to do if a rm command was used when it shouldn't have been?
267
views
1009
days
1
answers
Question sapply about
255
views
1009
days
1
answers
kNN.index vs. knn
239
views
1009
days
1
answers
kNN in class dependent variable
285
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1009
days
1
answers
Coaching Marketplace: Can coaches meet with different teams?
241
views
1009
days
1
answers
First Prediction Wednesday Model
333
views
1013
days
1
answers
Meaning of negative AUC (in Round 1 results)
297
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1014
days
1
answers
How do we write the predict function to give predictions for specific stocks?
255
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1014
days
1
answers
How to use validation method on two separate data sets (test data= jan2nd & train data=prev.yr data+jan1st data)
297
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1014
days
3
answers
HW#2: Calculating Second Half of SUBS dataset
408
views
1016
days
3
answers
Question about the NYSE dataset for Large Assignment  heavily skewed dependent variable
284
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1016
days
1
answers
Large Assignment: Input / Output and function deliverables
306
views
1016
days
1
answers
Prediction Algorithm Output and what it means: If all my predNB values are under 0.50, is it ever guessing "YES?"
336
views
1017
days
1
answers
How to use your newly computed v and d to calculate u on the second half of the data?
319
views
1017
days
1
answers
Output of the KNN algorithm question > Prediction or probability
319
views
1018
days
3
answers
Warning in install.packages : package â€˜imputeâ€™ is not available (for R version 3.2.3)
275
views
1018
days
1
answers
What is the purpose of svd?
533
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1019
days
3
answers
R error: infinite or missing values in 'x' when running svd(subs_mat)
267
views
1021
days
1
answers
Breaking a "tie" for Knearest neighbors
259
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1021
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?
294
views
1021
days
1
answers
How to manually compute proportions of 1s using k nearest neighbors in R?
230
views
1022
days
1
answers
What is the significance of document vector weighting?
282
views
1022
days
1
answers
What is the response variable for the Group Stock Price Project?
458
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1040
days
1
answers
Large Graded Partner Assignment Question
298
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1043
days
1
answers
Can you please clarify what you are asking for when you want predictors from 5 columns?
250
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1043
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1
answers
Homework due dates
251
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1043
days
1
answers
How to combine two functions with differing outputs and equations?
325
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1043
days
1
answers
How to compute a lag on a variable?
317
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1043
days
1
answers
Best Way to Attempt Homework
310
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1044
days
1
answers
did you mean to say flag or lag in the exercise?
254
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1044
days
1
answers
What does putting "as." in front of numeric or factor accomplish?
313
views
1044
days
1
answers
What is the difference between characters, numerics, factors, and integers?
328
views
1045
days
1
answers
How to compute the time window in model deployment?
362
views
1048
days
4
answers
How to keep the same structure of a data frame when appying functions to it?
386
views
1048
days
1
answers
Can you clarify the following statement: Compute the the sum by both ID1 and ID2 ? HW1 Exercise4 (due 2/1)
617
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1048
days
4
answers
Error: undefined columns selected, when running dummy(x)