All Questions
Tagged with nonparametric r
235
questions
0
votes
1
answer
109
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Getting different predicted values at a nonparametric regression at R
I want to estimate nonparametric estimates for an independent variable by using lokern package at R.
I have the below data which have 2 variables:
x: independent variable
y: dependent variable
<...
- 689
1
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0
answers
302
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NA in results of nparLD package: how to get rid of it? NB. it's not a missing data issue! [closed]
We have a longitudinal pilot-study measuring “perceived manageability” via ordinal (Likert scale) data at two time points. The between-groups factor is treatment group (Group1 vs Group2; where Group1 =...
- 11
3
votes
1
answer
1k
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How to interpret coefficients from rank based regression (Rfit package in R)?
I need to examine the relationship between an outcome variable (continuous) and a number of predictors. Since my data is non-normally distributed (i.e. the residuals from the multiple linear ...
- 61
1
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0
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356
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Survivor function for generalized gamma from flexsurvreg output
I am trying to plot/generate a survival curve in Excel using the output from flexsurvreg in R. The below is a snapshot from R with the corresponding estimates (y axis values) for the time (x axis ...
- 45
2
votes
2
answers
441
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Survivor function for log-normal from flexsurvreg output
I am trying to plot/generate a survival curve in Excel using the output from flexsurvreg in R. The below is a snapshot from R with the corresponding estimates (y axis values) for the time (x axis ...
- 45
0
votes
1
answer
2k
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Survivor function for log logistic from survreg output
I am trying to plot/generate a survival curve in Excel using the output from survreg in R. The below is a snapshot from R, I am not sure what to do with the values, how do I convert to the two ...
- 45
1
vote
0
answers
2k
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Wilcoxon signed rank test for likert data and composite scores
I have a survey where I used seven point Likert scale for all the questions. With 1 being Completely disagree to 7 meaning Completely agree.
I wanted to combine multiple questions (let's say 7 of ...
- 133
1
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0
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166
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MCAR tests on mixed variable datasets [findings + discussion]
I have been spending a whole week on researching about testing on missingness mechanism in datasets and I thought it will be helpful to share what I found out about the 2 available MCAR test packages ...
- 21
0
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1
answer
129
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How to find if the means of multiple groups are significantly different when the data is of non-normal distribution: Kruskal-Wallis?
I have dive data from ten shark tags. The tags recorded depth every 10 seconds while at liberty and returned a combined total of >900 k depth records. I would like to see if there is a significant ...
- 113
1
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0
answers
46
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Paired t-test on large sample that *should* be normal, but isn't (or Wilcoxon Signed Rank Test)?
A dataset contains the number of fast food restaurants per thousand people for each county in the USA, for two different years (five years apart). 3,143 rows.
None of the following are normally ...
user252085
2
votes
2
answers
403
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Repeated measurements with different measurement methods and uneven sample size - which test is suited?
I am struggling to find the appropriate statistical test to analyze my data. I hope that my question will be understandable.
I have the following setup:
A porcine spine with three vertebral bodies (...
- 71
3
votes
1
answer
1k
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Alternatives to three-way ANOVA with unbalanced and non-idependent data, non-normal distribution of the residuals and heterocedasticity
I have a response variable ("Value") and three categorical variables for which I want to test the main effects and interactions. ALL DATA COMES FROM ONE INDIVIDUAL for which we have data over time. ...
- 401
2
votes
1
answer
561
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Creating a custom distribution with flexsurvreg
I'm interested in fitting a parametric survival model but would like to explore the use of a Beta distribution for this purpose rather than a Weibull, Exponential, etc. model.
The Beta distribution ...
- 548
5
votes
1
answer
387
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R removing zeros for pseudomedian and its confidence interval in wilcox.test?
It makes sense to me that we need to remove zeros to calculate the p-value in a Wilcoxon signed rank test. What confuses me is that R seems to leave the zeros deleted when computing the pseudomedian ...
- 775
4
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1
answer
54
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R: How can I represent partially-ordered time series in R?
I believe that this is a statistics rather than a programming question, though I am tied to an R implementation and hope for a reply in kind.
I have data that constitutes several time series. I ...
- 3,157