All Questions
Tagged with logarithm data-transformation
162
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Rescale measures of association for meta-analysis (e.g., log-transformed independent variables)
I am carrying out a meta-analysis of studies evaluating the association between blood levels of specific environmental pollutants and health outcomes (binary).
Some studies reported OR/RR/HR for ...
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33
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log transform left data in r
I am having trouble finding the transformation operation for left/negatively skewed data. The catch? All of my values are between 0 and 1. As such, trying the standard log10 transformation command ...
- 111
3
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1
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186
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Back Transforming log-log Model for Prediction
I have a model that is log-log and I would like to make raw predictions of $Y$ with it:
$\ln(Y) = B_0 + B_1\ln(X)$
All answers and articles I have found concerning back transforming for prediction ...
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3
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Is the exponent of the MAD (Median Absolute Deviation) of log transformed Data measuring the relative distance from median in the untransformed data?
I want to confirm whether taking the Exponent of the MAD of Log Transformed Data gives me a measure of relative distance from median of the original untransformed data.
So say I have a MAD of 0.2 for ...
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47
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plotting log-transformed data, but running statistics on raw data?
I intend to compare differences between means of eight groups. The differences between some of the means are only visible when I plot (in a box plot) the log-transformed data. However, I am unsure as ...
1
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1
answer
35
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Can log2 be substituted with ln in logDice association measure?
I am currently doing collocational analysis in the Russian National Corpus, to be precise the Russian national news subcorpus, to see what is the most significant collocates of the lemma "gay&...
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59
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Detrending and data transformation to logarithm can be done together?
I want to get the effect of bitcoin price changes on foreign currency price. The third variable is inflation, which is an explanatory variable.
Should variables be detrended before regressing? Is it ...
9
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4
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915
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An interesting observation regarding the log transformation of data
I stumbled upon something interesting while attempting to do a log transformation for some data (with zeros) today. It seems that there must be a good reason for this that I'm just not seeing. I'm ...
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Optimal method for estimating geometric mean ratio using Bayesian log transformed data
I'm working on a Bayesian analysis with a categorical variable involving two groups (A vs B). I'm seeking advice on the best method to compute the geometric mean ratio (GMR) together with the highest ...
- 561
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61
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Log transformation leading to extremely negative R-squared and extremle values for MSE
I have a set of data and I am using this code on it:
...
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76
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R: boundary (singular) fit: see help('isSingular') with lrem model - only when transforming data to log
I am trying to run a lmer model on my dataset.
My dataset :
str(tabfi)
...
8
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2
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How to report my log transformed (+1) data?
Say that I have a variable with lots of 0 values that needs log-transforming so I do log(variable+1) to transform it. How do I write that in my methods section as opposed to just 'the data was log-...
5
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Always higher R squared after log transformation
lately I lost access to SPSS and instead of using Python or R, I tend to perform analysis using a free software called Jamovi.
The thing is, this software doesn't have the different non-linear ...
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1
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1
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60
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How to transform STDEV of a numerical value to logarithmic value? [closed]
I have the following question:
I have the average and STDEV values of variable. To transform this to Log10 scale, I directly apply the logarithm to the average. Can I do the same with the STDEV?
...
- 11
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309
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Can you do a log transformation for excess kurtosis, or is that mainly used for skewness?
I am planning on doing a regression analysis on STATA on the financial performance of private equity funds. On my descriptive statistics, I saw higher levels of kurtosis and skewness. I decreased ...
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