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Questions tagged [resampling]

Resampling is any of a variety of methods for estimating the precision of sample statistics by jackknifing or bootstrapping. In it also used to validating models by using random subsets (bootstrapping, cross validation).

From Wiki

In statistics, resampling is any of a variety of methods for doing one of the following:

Estimating the precision of sample statistics (medians, variances, percentiles) by using subsets of available data (jackknifing) or drawing randomly with replacement from a set of data points (bootstrapping)

Exchanging labels on data points when performing significance tests (permutation tests, also called exact tests, randomization tests, or re-randomization tests)

Validating models by using random subsets (bootstrapping, cross validation)

Common resampling techniques include bootstrapping, jackknifing and permutation tests.

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R take ten unique samples and break into training/test sets?

So my task is to break a dataframe of 506 observations into ten different samples of training and test sets (with replacement). I'm doing this so I can put it through a model and see the average MSE over ten samples. Thus far, I've got the…
CapnShanty
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Excel: Selecting a random sample from triangulated data

I want to select a (selection of)number(s) at random from a triangular table. How would I go about doing this? Or if anybody has a more sophisticated/efficient way of bootstrapping that would be great. The table needs to be in a format as below: x …
user2775790
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R resample data to a log-normal distribution

I have a set of simulated data that are roughly uniformly distributed. I would like to sample a subset of these data and for that subset to have a log-normal distribution with a (log)mean and (log)standard deviation that I specify. I can figure out…
MDeeps
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opencv, accessing element for downsampling but white window appear

i'm learning c++ api of opencv, and for a simple approach i've started with try to downsample image (ok i know that there is pyrDown with gaussian resampling but it's for learning how to access element in Mat class) this is my code: #include…
nkint
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Does Photoshop "Save for web" still resample if you don't resize?

Will resampling still happen if you don't resize your image in Photoshop on save for web? I understand resizing vs resampling is making print size smaller with same pixels vs. less pixels with interpolation. But what if I'm saving for web, but not…
Art C
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matlab uniformly resample

I have a severely unbalanced data set. I want to perform a uniform resampling with 200% of the original data set size. the resample function seems cannot perform as I expected. Anyone knows any toolbox or function can perform this? Thanks.
evergreen8710
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Get continuous dataframe in pandas by filling the missing month with 0

I have a pandas dataframe as shown below where I have Month-Year, need to get the continuous dataframe which should include count as 0 if no rows are found for that month. Excepcted output is shown below. Input dataframe Month |…
Vinay Ranjan
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