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 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 8,520 3 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

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 compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 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

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 View

The Shannon's index is inversely proportional to Simpson's index (1-D)?

I'm having a problem with my bloxplot with Shannon's and Simpson's indexs. The value of Shannon for my Community 1 indicating higher diversity (in relation of the Community 2), but have lower...

26 February 2021 3,033 9 View

VIF very high, but correlation is low and coefficient is significant. Which one whould I choose?

Hello. I have a question whether if my coefficients (statistically significant) would be valid when VIFs are really high. In my model, there are independent variables(IV), moderating variables...

26 February 2021 956 13 View

How can I set up a good fit SEM model in AMOS?

I am trying to make an SEM model in AMOS for my dissertation but having some trouble with getting a good fit. I am looking for relationships between self-efficacy reported on a Likert scale and...

26 February 2021 8,642 4 View