Error with morphol.disparity

[dave.a...@colby.edu]

Hi everyone,

I wanted to ask if there is a solution to this error with `morphol.disparity` that appears with the example code.

```

data(plethodon)
Y.gpa <- gpagen(plethodon$land, print.progress = FALSE)    #GPA-alignment
gdf <- geomorph.data.frame(Y.gpa, species = plethodon$species,
                           site = plethodon$site)

# Morphological disparity without covariates, using overall mean
morphol.disparity(coords ~ 1, groups= ~ species * site, data = gdf,
                  print.progress = FALSE)

```

```

Error in La.svd(X, k, k) : a dimension is zero

```

I see that a problem with this function was discussed last year, but I run into this issue with the current CRAN (4.0.10) and development (4.0.10.999) versions.

Suggestions?

Many thanks. -- Geomorph is a wonderful tool, and the community support here is greatly appreciated!

Best,

Dave

[Omar Mejía]

Hi Dave,

Just run your code without a problem. I am using geomorph 4.0.1, rgl 1.3.24  and RRPP 2.1.2 in Rstudio 2022.02.3 and R 4.5.1

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Omar Mejía G

Laboratorio de Variación Biológica y Evolución

Departamento de Zoología

Escuela Nacional de Ciencias Biológicas-IPN

[Adams, Dean [EEOB]]

Dave,

Be sure to install both the latest version of geomorph ANS the latest version of RRPP from CRAN.  

When I do that the code works as intended.

Best, 

Dean

-- 
Dr. Dean C. Adams
Distinguished Professor
Director, Ecology and Evolutionary Biology Graduate Program
Department of Ecology, Evolution, and Organismal Biology
Iowa State University
www.public.iastate.edu/~dcadams/
phone: 515-294-3834

---

From: geomorph-...@googlegroups.com <geomorph-...@googlegroups.com> on behalf of dave.a...@colby.edu <dave.a...@colby.edu>
Sent: Wednesday, October 29, 2025 4:28 PM
To: geomorph R package <geomorph-...@googlegroups.com>
Subject: [geomorph-r-package] Error with morphol.disparity

 

[Mike Collyer]

Dave,

You might also want to make sure the Matrix library is up to date.  I recommend, however, that you do not use the development version of RRPP if it is your tendency to install development versions from GitHub.  That version is currently volatile, thanks to ongoing work to fix an issue imposed by some base R functions.

Best,

Mike

morphol.disparity(coords ~ 1, groups = ~ species * site, data = gdf, 
                  print.progress = FALSE)

```

```

Error in La.svd(X, k, k) : a dimension is zero

```

I see that a problem with this function was discussed last year, but I run into this issue with the current CRAN (4.0.10) and development (4.0.10.999) versions.

Suggestions?

Many thanks. -- Geomorph is a wonderful tool, and the community support here is greatly appreciated!

Best,

Dave

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[Dave Angelini]

The most recent CRAN version of RRPP solved the problem. — Apologies. I’ve generally kept on top of the geomorph + RRPP updates  as a known issue. — Just tried the dev version in case it offered a solution in this case. 

Many thanks!

To view this discussion, visit https://groups.google.com/d/msgid/geomorph-r-package/8E83220F-74B8-44E0-BD1B-21FD2B5C6F19%40gmail.com.