Can anyone help me find the median of groups with [various sizes] in R?

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Having trouble with installing R "devtools"?

I run: install.packages("devtools") in my terminal & get the error message: bash: syntax error near unexpected token `"devtools"'. Any ideas of how I can successfully install this R package...

10 November 2016 4,428 0 View

Problem with "community.to.membership" in R?

I'm analyzing some graphs in R, and have an error with "community.to.membership". I get error message "Error: could not find function "community.to.membership", anyone seen it before? When I type...

09 October 2015 6,354 2 View

What is the best approach to model Multivariate Non-Gaussian data with multiple covariates?

Suppose I have 3 response variables (Y1, Y2, Y3, which are vectors of count data). Assume I also have multiple co-variates that are both categorical (e.g. X1, X2, X3) and numerical (e.g. Z1, Z2,...

11 December 2014 402 4 View

How can I find unique entries in Table, in "R"?

Suppose I have a table, T3. I would like to find unique values by removing repeated rows (with reversed entries, e.g. row 1 and 4). The final table I need should look like T4. Simply using...

10 November 2014 8,653 3 View

How can I compute partial correlation coefficients (pccs) in R?

I am computing pccs in R using a dataset "X" of dimension mxp (m>>p). Notably, all goes well when "X" has no missing values (no "NA" in dataset). So far I have tried commands "pcor" and...

06 July 2014 1,319 2 View

How do you measure the median values of the central tendency?

I've the data in the "Table" given below (as generated from R-package), does anyone out there know how to get the median values as shown in "output"? I've tried using "tapply" but this only works...

05 June 2014 4,875 1 View

How can I find the median in R?

Given a vector, e.g. x

02 March 2014 2,894 5 View

Can anyone help to compute medians?

[problem in R]: How can I compute the medians of the rows in the matrix x3; where, e.g. x1

02 March 2014 4,365 2 View

How do I read .dat files in R?

Just loaded, read and worked with ".txt" and ".csv" files in R (no problems), but having trouble loading ".dat" files.

02 March 2014 9,260 8 View

How do I get the median of multiple columns in R?

Given the table "Tgiven", I need to compute the median "val_med" of the columns "val1" and "val2", i.e. need to get the table "Trequired" Below is a simple data structure that mimics the more...

02 March 2014 2,266 6 View

Posthoc test lettering in JAMOVI?

Does anyone know of a module for the JAMOVI software that is capable of generating mean separations using the classic letters based on post hoc results (e.g., Tukey test)? If, as I believe, such...

31 July 2024 3,333 4 View

All math can be explained by iterator of code?

all math can be traversed by code? all math can be translate to code?

26 July 2024 9,530 0 View

How do I access .vcf files without an R statistical package?

I am currently working on a mendelian randomization study, and I have downloaded the datasets needed from the ieu opengwas project (mrcieu.ac.uk) in .vcf format. I do not have access to an R...

19 July 2024 2,342 5 View

How to decide whether the refinement is correct or not, based on Rwp and Rexp factors by Fullprof?

One of the papers I read by Toby, where (title of the paper was "R factors in Rietveld analysis: How good is good enough?"), he tells us that to get good chi square value, you must have low Rwp,...

17 July 2024 9,668 4 View

Which book and outline do you recommend for computational physics course for BS level ?

students already took 1. numerical methods 2. programming language 3. Probability and statistics

09 July 2024 6,271 3 View

Why does our stiff biochemical ODE model in R produce unreasonable results (negative values, NAM) despite using solvers like lsoda, vode, and rk4)?

We have developed an ODE model comprising 25 interrelated equations with common coefficients. This biochemical model, applied in wastewater treatment, is characterized by stiffness. Utilizing the...

06 July 2024 7,077 4 View

Which is better for the student : Implementing the principles of object-oriented programming using Java or C++?

Object-Oriented Programming

29 June 2024 4,877 12 View

How to design an online training, learning platform ?

when designing an e-learning platform what model and programming language do you select?

29 June 2024 7,504 4 View

How to reconstruct original observations using PCA?

I ran PCA on 4 variables using the prcomp library. All variables were normalized to have a mean of zero and a standard deviation of one (z-score) before the PCA. prc 1 and I performed a varimax...

26 June 2024 6,792 1 View

What is it's difference between lsoda method in R vs. ODE23 or 45 solver in MATLAB?

What is it's difference between lsoda method in R vs. ODE23 or 45 solver in MATLAB.(especially in wastewater treatment and biochemical processes) I am currently engaged in the development of a...

24 June 2024 9,188 2 View