Tag: logarithm

133 In linear regression, when is it appropriate to use the log of an independent variable instead of the actual values? 2010-07-20T13:11:50.297

118 When (and why) should you take the log of a distribution (of numbers)? 2011-11-23T20:41:02.740

36 Interpretation of log transformed predictor 2011-11-16T10:03:24.363

26 What are alternatives to broken axes? 2010-08-17T05:22:31.340

22 Why is it that natural log changes are percentage changes? What is about logs that makes this so? 2016-11-04T15:07:52.107

17 In statistics, should I assume $\log$ to mean $\log_{10}$ or the natural logarithm $\ln$? 2016-04-03T22:16:29.963

15 Expected value and variance of log(a) 2013-04-30T15:42:55.540

15 Log probability vs product of probabilities 2014-10-24T01:12:41.997

14 Skewness of the logarithm of a gamma random variable 2017-11-09T10:10:53.223

12 Why use logged variables? 2012-08-02T10:20:04.227

11 Why log-transforming the data before performing principal component analysis? 2015-08-02T16:05:51.750

10 Binary Models (Probit and Logit) with a Logarithmic Offset 2013-08-08T00:49:02.913

9 Advice on identifying curve shape using quantreg 2011-03-31T13:53:50.733

9 If I have the expected value of the logarithm of a RV, can I obtain the expected value of the RV itself? 2016-09-19T15:33:15.463

8 How to interpret logarithmically transformed coefficients in linear regression? 2011-12-30T21:51:26.310

8 Is it correct to use 'Ln' instead of 'ln' for natural logarithm? 2014-01-28T21:15:46.997

8 How to transform negative values to logarithms? 2015-06-04T04:50:45.173

7 Taking correlation before or after log-transformation of variables 2012-02-13T05:29:35.540

7 Logistic regression with an log transformed variable, how to determine economic significance 2012-07-29T12:52:29.577

7 How to interpret log-log regression coefficients for other than 1 or 10 percent change? 2014-06-12T23:52:37.783

7 Does "Log loss" refer to Logarithmic loss or Logistic loss? 2016-07-14T03:45:52.750

7 Regression for power law 2016-10-30T07:57:37.387

7 Multicollinearity between ln(x) and ln(x)^2 2017-11-08T15:56:50.207

7 Does taking the logs of the dependent and/or independent variable affect the model errors and thus the validity of inference? 2017-11-22T19:30:47.347

6 Log graph question 2010-09-23T03:57:03.107

6 How to log transform Z-scores? 2011-10-11T00:40:56.863

6 How can I sample from a log transformed distribution using uniform distribution? 2011-10-24T10:10:04.493

6 Transforming the dummy values to be able to take logs 2012-01-20T15:09:24.320

6 What are the formulas for exponential, logarithmic, and polynomial trendlines? 2015-01-20T09:05:22.823

6 Is there something clever I can do with a log of a sum? 2015-08-17T14:38:38.003

6 If my goal is to test the absolute change of the ratios, can I compare the ratios directly without log transformation? 2016-06-26T03:07:20.050

6 Linear regression with log transformed data - large error 2017-01-05T11:59:19.283

5 Taking the log of variables 2013-11-09T02:03:06.797

5 Reporting regression statistics after logarithmic transformation 2014-04-08T21:37:18.400

5 Approximation of logarithm of standard normal CDF for x<0 2014-07-06T23:10:17.343

5 do logs modify the correlation between two variables? 2014-12-08T09:31:31.337

5 How to interpret log-transformed predictors in probit regression? 2015-08-03T09:34:19.890

5 Find the distribution of $ N = \min \left\{k: \prod_{i = 1}^{k}U_i \lt .6\right\}. $ 2016-03-06T20:06:29.280

5 Alternatives to multilevel model with log transformed outcome 2016-04-22T07:16:21.863

5 Are log difference time series models better than growth rates? 2016-07-02T02:54:50.033

5 How to interpret log-log regression coefficients with a different base to the natural log 2017-01-09T16:52:07.033

4 Why (or when) to use the log-mean? 2010-07-27T14:46:49.640

4 Why are time-related covariates log transformed in modelling? 2013-05-27T21:30:06.240

4 Is it valid to log-transform percentages? 2013-08-24T14:05:56.263

4 Plotting variables in transformed space 2013-10-29T14:38:39.240

4 Avoiding large variances when taking the logs of small values 2014-03-25T03:41:31.567

4 Multi-class logarithmic loss function per class 2014-08-26T14:57:40.850

4 Looking for a layman's explanation of how to manually calculate log odds? 2014-11-07T19:57:40.267

4 Log Transformation 2015-05-17T17:42:24.897

4 Nonparametric estimation of the logarithm of a density 2015-11-10T21:56:42.390

4 Error bars in logarithmic scale 2016-10-07T10:22:36.317

4 Calculating Formula with logs and Weighted Average 2016-12-23T00:27:50.577

4 Expectation of the log of a ratio of two lognormal random variables with additive constants 2017-04-02T13:59:20.240

4 Why does log-transformation of the RNA-seq data reduce the amount of explained variance in PCA? 2017-12-20T20:45:35.910

3 Software to plot a log graph 2011-07-04T11:38:12.637

3 Back-transformation and interpretation of $\log(X+1)$ estimates in multiple linear regression 2011-11-21T06:44:19.107

3 Is it possible (or even usefull) to transform Log transformed data into Z-scores? 2012-06-06T11:37:08.343

3 Can we use as predictor a variable that was used in the calculation of the dependent (a ratio)? 2013-01-30T11:27:41.060

3 Performing calculation of a product of a sequence, 2013-09-25T15:33:04.250

3 Interpreting Log-Transformed Percentages in OLS 2014-07-09T01:36:30.183

3 Value of logarithmic form 2015-01-12T03:16:37.947

3 Advantages of taking the logarithm to minimize the likelihood 2015-04-10T13:47:10.823

3 Large Increase in Naive Bayes Accuracy results in decrease precision? 2015-06-23T21:36:19.550

3 log-log vs. normal plotting for showing linear dependency 2015-07-16T19:20:18.610

3 Rule of thumb for using logarithmic scale 2015-07-22T11:18:43.033

3 What is the difference between a $\log_{10}$ and logit transformation? 2015-07-28T21:10:33.640

3 How do I change logarithmic scaled data to linear scaled data? 2015-08-06T20:07:17.487

3 log-log transformation 2015-12-16T13:41:36.310

3 Is there a model with additive effects for always positive dependant variable? 2016-02-04T15:28:53.273

3 How to interpret regression equations with logarithms, based on log difference being approximate to percentage change? 2016-03-01T03:03:54.097

3 Can we take natural log of a variable in ratio form e.g. age dependency ratio? 2016-03-04T14:27:18.733

3 Coefficients linear and log-linear regression model 2016-07-03T11:27:41.683

3 Approximated relation between the estimated coefficient of a regression using and not using log transformed outcomes 2016-11-01T11:13:03.870

3 Regression models for log transformed data without multiplicative error 2017-01-06T13:59:42.607

3 Formula for the covariance of logs in exponential families 2017-01-24T08:54:21.377

3 Appropriate use of logarithmic notations in publications 2017-07-12T13:20:50.413

3 natural log approximation 2017-07-19T21:15:21.573

3 Interpretation of double log model when variables are ratios 2017-09-25T03:38:37.903

3 Alternative to log when doing linear regression on multiplicative dataset with zeros 2017-12-19T08:28:34.610

3 How does poisson regression handle zeros anyway? 2018-01-10T02:02:22.537

3 Low-valued multivariate integral in R 2018-02-05T14:59:17.203

2 How do you calculate the standard deviation on a multiplicative scale for a distribution that has been transformed logarithmically? 2010-09-22T01:21:15.247

2 Math Statistics Bell Curve Computing % correct given 2 numbers (C#) 2011-10-13T18:58:05.600

2 Interpreting a quadratic logarithmic term 2012-02-07T13:46:01.427

2 Base-10 lognormal PDF integrated over log10(x) 2012-02-10T21:04:29.513

2 Binomial distribution confidence interval for log plot 2012-03-09T15:31:11.303

2 Is it mathematically justifiable to log transform variables before running an ANOVA? 2012-07-03T23:45:51.690

2 Fitting ratios in multiple regression formula 2012-11-25T22:52:34.673

2 multiplicative treatment effects with standard errors 2012-12-14T08:15:04.790

2 OLS standard error log log regression 2013-05-14T01:19:17.500

2 First difference or log first difference? 2013-05-17T18:20:58.293

2 Bias correction of logarithmic transformations 2013-09-10T01:00:17.957

2 Questions on equation of log linear regression 2013-09-11T13:04:15.747

2 Estimating the effects of cumulative odds ratios - additive or exponential? 2013-10-30T15:07:26.137

2 Use logarithmic or linear values when performing correlation and ANOVA? 2014-01-10T15:41:11.000

2 interpreting the coefficient on a logged independent variable from a probit model 2014-03-01T09:19:18.910

2 Interaction term in a linear log model 2014-03-30T06:46:35.053

2 Log-scaled chart for visualizing extreme range 2014-04-27T23:11:28.113

2 Regression and link function 2014-05-02T17:22:32.377