Zach

6,929 reputation

11754

bio	website	moderntoolmaking.blogspot.com
	location	San Francisco, CA
	age	26
visits	member for	2 years, 4 months
	seen	6 hours ago
stats	profile views	638

I'm a data hacker! http://www.kaggle.com/users/6696/zach

google

	6,929 reputation	bio	website	moderntoolmaking.blogspot.com	visits	member for	2 years, 4 months
11754 badges		location	San Francisco, CA		seen	6 hours ago

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47 Questions

views newest activity votes

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kviews

Data APIs/feeds available as packages in R

r dataset big-list sources

jul 27 at 18:31 IEORTools 25

votes

answers

981

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Cloud computing platforms for machine learning

r machine-learning

jul 8 at 19:05 Prof. Falken 118

votes

answers

532

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Fitting an ARIMAX model with regularization or penalization (e.g. with the lasso, elastic net, or ridge regression)

r time-series lasso regularization elastic-net

feb 18 at 8:56 NRH 6,362

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answers

576

views

Sites for predictive modeling competitions

machine-learning predictive-models

jan 31 at 17:20 Zach 6,929

votes

answers

257

views

Why bother with low rank approximations?

r matrix

sep 4 at 8:33 JohnRos 1,531

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answers

kviews

Example of strong correlation coefficient with a high p value

r hypothesis-testing correlation

feb 21 '12 at 18:45 cardinal 10.6k

votes

answer

kviews

R libraries for deep learning

r neural-networks deep-learning deep-belief-networks

may 8 at 20:33 Ardenne 26

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answers

kviews

Cross-validating time-series analysis

r time-series cross-validation

jan 12 '12 at 16:16 Zach 6,929

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answers

kviews

Simple linear model with autocorrelated errors in R

r time-series autocorrelation

apr 29 at 8:41 fatos 1

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answer

306

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Support vector machines and regression

regression machine-learning svm

aug 17 '11 at 19:57 chl♦ 27.2k

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468

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Best way to interact with an R session running in the cloud

jun 19 '11 at 14:27 Zach 6,929

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answers

kviews

When to log transform a time series before fitting an ARIMA model

r time-series data-transformation forecasting arima

feb 23 '11 at 20:20 csgillespie 6,094

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answer

619

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Extending 2-class models to multi-class problems

r machine-learning classification statistical-learning multi-class

mar 15 '12 at 23:54 Community♦ 1

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answer

841

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Dimensionality reduction (SVD or PCA) on a large, sparse matrix

r pca dimensionality-reduction svd matrix-decomposition

aug 27 at 18:39 Zach 6,929

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answer

kviews

1-step-ahead predictions with dynlm R package

r dynamic-regression

feb 17 '12 at 9:20 mpiktas 13.9k

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answers

338

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Bootstrapping estimates of out-of-sample error

bootstrap resampling out-of-sample

may 15 at 14:16 Frank Harrell 8,024

votes

answers

603

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Parallelizing the caret package using doSMP

r parallel-computing

jun 19 '11 at 14:51 Dirk Eddelbuettel 4,686

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351

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ROC surfaces in R

r data-visualization roc

mar 4 '11 at 23:27 mbq♦ 12k

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answer

kviews

How to graphically compare predicted and actual values from multivariate regression in R?

r regression multivariate-analysis multiple-regression

feb 18 '11 at 10:04 chl♦ 27.2k

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answers

kviews

Predicting from a simple linear model with lags in R

r time-series regression predictive-models

feb 1 '11 at 16:19 Zach 6,929

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answers

996

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Stacking/ensembling models with caret

r caret ensemble

oct 15 at 19:08 Zach 6,929

votes

answers

993

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Recurrent neural networks in R

r time-series forecasting neural-networks

dec 15 '11 at 12:22 Hans Werner 231

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answers

417

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Implementing the 'kernel trick' for a support vector machine in R

r machine-learning kernel svm

apr 2 '11 at 13:22 mbq♦ 12k

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answers

views

Covariate shift correction: standard implementation in R?

r covariate-shift

apr 19 at 15:03 Shea Parkes 1,281

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answer

347

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Naive Bayes fails with a perfect predictor

r machine-learning naive-bayes

sep 5 at 6:57 steffen 3,445

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answers

927

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Predict after running the mlogit function in R

r logistic logit multinomial

aug 14 at 9:15 sim 1

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answer

232

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Embarrassingly parallel machine learning algorithms

r machine-learning statistical-learning

jan 23 '12 at 2:44 Zach 6,929

votes

answers

kviews

Using an SVM for feature selection

r svm

may 12 '11 at 9:22 404Dreamer_ML 250

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answer

kviews

Combining auto.arima() and ets() from the forecast package

r time-series forecasting exponential arima

jan 19 '11 at 18:39 Zach 6,929

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answer

views

Re-scaling a confusion matrix after down sampling one class

r predictive-models binary-data

apr 18 at 18:23 B_Miner 1,111