Recent questions tagged statistics

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statistics - What is difference between replicate n times and generate n directly in sampling of R?

I am asked to "simulate x as an independent identically distributed (iid) normal variable with mean=0, std=1.5 ... those two ways? Many thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - Mean square displacement python

I have a trajectory file from simulation of 20,000 frames with 5 ps time in between every frame, what I ... . Hope to get positive response. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - Select x random elements from a weighted list in C# (without replacement)

Update: my problem has been solved, I updated the code source in my question to match with Jason's answer. Note ... { get; set; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - Student's t distribution in JavaScript for Google Spreadsheet

Google Spreadsheets currently does not support the standard function TDIST - i.e. the Student's t-distribution. This ... t-test itself). Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - Classification score: SVM

I am using libsvm for multi-class classification. How can I attach classification scores, to compare the confidence ... score3 Class 4: score4 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - R - fast two sample t test

I would like to perform a two sample t test in R using separate groupings. The t.test must be "unbiased", meaning ... by=grp1] } , by=grp2] See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - Setting Contrasts for ANOVA in R

I've been attempting to perform an ANOVA in R recently on the attached data frame. My question revolves around the ... for your time Data file: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - PCA and Hotelling's T^2 for confidence intervall in R

I made a principal component analysis and took the 2 first principal components. I made a chart of my points ... points out of the ellipse: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - Calculating sum of squared deviations in R

How can I calculate the sum of squared deviations(from the mean) of a vector? I tried using the command sum ... am missing here perhaps? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - How to print the name of current row when using apply in R?

For example, I have a matrix k > k d e a 1 3 b 2 4 I want to apply a function on k > apply(k,MARGIN= ... do that in R. Does anyone has any idea? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - normality test of a distribution in python

I have some data I have sampled from a radar satellite image and wanted to perform some statistical tests on ... but the problem persists. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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statistics - Calculating the Median with Mysql

I'm having trouble with calculating the median of a list of values, not the average. I found this article Simple ... x and y columns refer to? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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537 views

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statistics - How to put a complicated equation into a R formula?

We have the diameter of trees as the predictor and tree height as the dependent variable. A number of different ... second equation to our data? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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517 views

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statistics - skew normal distribution

we have skew normal distribution with location=0, scale =1 and shape =0 then it is same as standard ... different values of shape parameter See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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632 views

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statistics - multivariate student t-distribution with python

To generate samples with multivariate t-distribution I use this function: def multivariatet(mu,Sigma,N,M): '' ... in multi-dimensional space. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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618 views

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statistics - Which java-library computes the cumulative standard normal distribution function?

For a project I have a specification with formulas, I have to implement. In these formulas a cumulative ... that computes this function? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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644 views

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statistics - Which java-library computes the cumulative standard normal distribution function?

For a project I have a specification with formulas, I have to implement. In these formulas a cumulative ... that computes this function? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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492 views

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statistics - Which java-library computes the cumulative standard normal distribution function?

For a project I have a specification with formulas, I have to implement. In these formulas a cumulative ... that computes this function? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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641 views

1 answer

statistics - multivariate student t-distribution with python

To generate samples with multivariate t-distribution I use this function: def multivariatet(mu,Sigma,N,M): '' ... in multi-dimensional space. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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555 views

1 answer

statistics - Which java-library computes the cumulative standard normal distribution function?

For a project I have a specification with formulas, I have to implement. In these formulas a cumulative ... that computes this function? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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674 views

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statistics - Test if a data distribution follows a Gaussian distribution in MATLAB

I have some data points and their mean point. I need to find whether those data points (with that mean ... overlooked the right function. cheers See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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477 views

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statistics - Most mature sparse matrix package for R?

There are at least two sparse matrix packages for R. I'm looking into these because I'm working with ... View mentions Matrix and SparseM. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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704 views

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statistics - How to get GitHub Clone stats?

There used to be a "Clones" sub-tab in the "Stats & Graphs" tab of GitHub (for example https://github.com/ ... , pulls, GitHub page views, etc. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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639 views

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statistics - Sample from multivariate normal/Gaussian distribution in C++

I've been hunting for a convenient way to sample from a multivariate normal distribution. Does anyone know of a ... so, use Cholesky instead? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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622 views

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statistics - Convert Z-score (Z-value, standard score) to p-value for normal distribution in Python

How does one convert a Z-score from the Z-distribution (standard normal distribution, Gaussian distribution) to a p- ... but one must be there. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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567 views

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statistics - How to calculate the 95% confidence interval for the slope in a linear regression model in R

Here is an exercise from Introductory Statistics with R: With the rmr data set, plot metabolic rate versus body ... interval for the slope? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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637 views

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statistics - In R, how to find the standard error of the mean?

Is there any command to find the standard error of the mean in R? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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485 views

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statistics - Which Git commit stats are easy to pull

Previously I have enjoyed TortoiseSvn's ability to generate simple commit stats for a given SVN repository. I ... weekly changes) Any ideas? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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