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 4,291 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 6,182 2 View

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

11 December 2014 265 4 View

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

06 July 2014 1,197 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 4,750 1 View

How can I find the median in R?

Given a vector, e.g. x

02 March 2014 2,755 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 4,217 2 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 1,968 6 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 9,043 8 View

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

Suppose I have the variables: groups and values in Table 1. Can someone suggest to me how I can obtain the result of the median of the groups as indicated in the table named "Output": groups

02 March 2014 6,009 4 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View

Which is suitable for use with Python? MySQL or SQL Server?

Which is suitable for use with Python? MySQL or SQL Server? What is your suggestion?

01 March 2021 3,422 3 View

How to plot the probability paper of Gumbel distribution using R programing?

In R-studio, there are many commands of Gumbel package. Arguments are also different. I`m asking about the alpha parameter of the Copula which must be greater than 1. If this is the one used to...

25 February 2021 5,229 3 View

What software programs can directly simulate Additive Manufacturing Directed Energy Deposition (DED)?

I understand there are a lot of software programs that can simulate DED by going through specific modeling, simulation, and commands. For me, that was time consuming and results were not accurate....

24 February 2021 4,428 3 View

I am looking for a simple software program to model 3D chemical bonds. The purpose is to generate high-quality graphical abstracts. Any suggestion?

Hello everyone: I am looking for a simple software program to model chemical bonds. The purpose is to generate a high-quality graphical abstract for a top leading journal in the field of...

23 February 2021 8,012 3 View

Bayesian decision trees and bayesian regression trees in Python and/or R?

I am looking for implementation of bayesian decision trees and bayesian regression trees in Python and/or R.. Do you know if the existing libraries support this

23 February 2021 6,689 3 View

How to estimate 2SLS with different instruments for different endogenous variables?

To be specific, I want to conduct an IV regression in stata with the following three equations. EQ1: Y1 ~Y2 Y3 X EQ2: Y2 ~ Z1 EQ3: Y3 ~ Z2 Both Y2 and Y3 are endogenous. However, Z1 and Z2 are...

23 February 2021 6,266 3 View

How to constrain genetic algorithm input u?

My real system (buck converter) can only take an input of 0 to 1 (duty ratio) and I need to constrain the system so the controller action keeps within this bounds. How can I do this? The code for...

22 February 2021 2,125 3 View

Are there packages (R or Python) for simple models (bucket?) to assess soil water content?

Hi everyone. I am researching droguht effects on soil water drought. I am looking for already implemented functions in R or Python to estimate soil water content from precipitation,...

21 February 2021 2,084 1 View

Which is the best software or programming language (user friendly) for analysing data?

I have a basic knowledge on Python, R and MATLAB in analysing data. Among those, which is the best and user friendly? Which one should I learn deeply to analyse data?N:B: I want to learn data...

20 February 2021 3,950 15 View