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Questions - statistics

Successive calculation of coefficient of variation

I'm having a long list of values which is triple indexed (i,j,t). For all i in I and j in J I have to extract all t values and calculate the coefficient of variation (cv) successively. The length of t...
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clueless

python

loops

statistics

Votes: 0

Answers: 1

Latest Answer

Im posting this in the assumtion that you can easily extract your data into a (i,j,t) sized numpy array. In that case you can let numpy do its magic: cv_list = np.std(data, axis=2, ddof=1)/np.mean(dat...
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Eumel

How do I interpret error: "Error in intI(j, n = x@Dim[2], dn[[2]], give.dn = FALSE) : invalid character indexing" in R?

I am trying to run this small script in R: minimumFrequency <- 10 datadtm <- DocumentTermMatrix(datacorpusclean, control=list(bounds = list(global=c(1, Inf )), weighting = weightBin)) # conver...
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Davide

r

statistics

Votes: 0

Answers: 1

Latest Answer

This means that you are trying to extract somehow a column that doesn't exist. Here is a way to reproduce this problem: library(Matrix) dd <- data.frame(a = gl(3,4), b = gl(4,1,12))# balanced 2-wa...
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Tal Galili

Step vs. StepAIC

I'm trying to understand why my code has taken several days to process and how I can improve the next iteration. I'm on my third day and continue to have outputs with marginal improvements in AIC. The...
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thou

r

statistics

mass

Votes: 0

Answers: 0

Can you add weightings to values for linear regression?

I'm trying to develop a predictive model that uses previously collected data to estimate a future value. The data in question is taken from measurements made over several days, however the more recent...
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RDP248

math

statistics

linear-regression

Votes: 0

Answers: 0

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