Version 2.1.1 Released

by Nicholas Hamilton 1/04/2016 | 2:57 8 Posted in New Feature, User Request

Hi Folks, ggtern v2.1.1 has just been submitted to CRAN. This includes a number of minor bug fixes, and an additional annotation, permitting the rendering of raster data, say for the inclusion of images. This post will demonstrate the use of this requested feature.

Demonstration of Raster Annotation

Several people have asked me how they can overlay their new data over the top of an existing ternary diagram, say from a publication and the like. Included in this ggtern 2.1.1 is raster-array data for Figure 6 from Elkins and Groves Feldspar[1], lets dive in and demonstrate how to overlay some fresh points over this existing figure, for the sake of convenience, lets use the data from the same paper for the points themselves.:

#Load necessary libraries
library(ggtern)

#Load the Datasets
data(Feldspar)
data(FeldsparRaster)

#Build the Plot
ggtern(Feldspar,aes(Ab,An,Or)) + 
  theme_rgbw() + theme_nogrid() + theme_legend_position() + 
  annotation_raster_tern(FeldsparRaster,xmin=0,xmax=1,ymin=0,ymax=1) +
  geom_mask() + 
  geom_point(size=5,aes(shape=Feldspar,fill=Feldspar),color='black') +
  scale_shape_manual(values=c(21,24)) +
  labs(title="Demonstration of Raster Annotation")

#Load necessary libraries

library(ggtern)

#Load the Datasets

data(Feldspar)

data(FeldsparRaster)

#Build the Plot

ggtern(Feldspar,aes(Ab,An,Or)) +

theme_rgbw() + theme_nogrid() + theme_legend_position() +

annotation_raster_tern(FeldsparRaster,xmin=0,xmax=1,ymin=0,ymax=1) +

geom_mask() +

geom_point(size=5,aes(shape=Feldspar,fill=Feldspar),color='black') +

scale_shape_manual(values=c(21,24)) +

labs(title="Demonstration of Raster Annotation")

This produces the following result:

If people have suggestions for further additions, I welcome this input, and as usual, if this package has assisted you in your work, please feel free to contribute to my beer fund via the donations link at the top of the page.

References

[1] L. T. Elkins and T. L. Grove, “Ternary Feldspar Experiments and Thermodynamic Models,” American Mineralogist, vol. 75, iss. 5-6, p. 544–559, 1990.
[Bibtex]

@Article{elkins1990ternary,
Title = {Ternary Feldspar Experiments and Thermodynamic Models},
Author = {Elkins, Linda T and Grove, Timothy L},
Journal = {American Mineralogist},
Year = {1990},
Number = {5-6},
Pages = {544--559},
Volume = {75},
File = {elkins1990ternary.pdf:Users/nick/Copy/UNSW/PhD/References/Referenced/elkins1990ternary.pdf:PDF},
Owner = {Nick Hamilton},
Publisher = {Mineral Soc America},
Timestamp = {20140123}
}

Tags:CRAN, ternary, update

Nick Hamilton

Author of the ggtern package. PhD candidate at the University of New South Wales in the School of Materials Science and Engineering. My field is in the simulations of metallic glasses via several advanced simulation techniques such as QMD and RMC.

Comments

Michael Slattery 1/04/2016 | 1:15

Hello Nick,
I cant seem to get the new package loaded. It updated fine, but upon

library(ggtern)

1	library(ggtern)

I get :

Loading required package: ggtern
Error in get(method, envir = home) : 
  cannot allocate memory block of size 3.5 Gb
In addition: Warning messages:
1: In .registerS3method(fin[i, 1], fin[i, 2], fin[i, 3], fin[i, 4],  :
  restarting interrupted promise evaluation
2: In get(method, envir = home) :
  restarting interrupted promise evaluation

Loading required package: ggtern

Error in get(method, envir = home) :

cannot allocate memory block of size 3.5 Gb

In addition: Warning messages:

1: In .registerS3method(fin[i, 1], fin[i, 2], fin[i, 3], fin[i, 4], :

restarting interrupted promise evaluation

2: In get(method, envir = home) :

restarting interrupted promise evaluation

Any idea what the error is regarding the memory block size?

thanks!
Mike

Nicholas Hamilton 3/04/2016 | 11:16

Not sure, mine downloads and installs from cran just fine.

Reply

Scott 3/04/2016 | 9:33

Hi Nick,
A while back you did an tutorial on how to reproduce a ZrO2, Al2O3, SiO2 phase diagram from the Journal of the American Ceramic Society using data points supplied in a publication.

Would it be possible for you to give a similar quick breakdown of how to recreate the phase diagram on page 424 of:
Arnulf Muan, “Phase Equilibrium Relationships at Liquidus Temperatures in the System FeO–Fe2O3–Al2O3–SiO2,” Journal of the American Ceramic Society, vol. 40, iss. 12, pp. 420–431, December 1957.

I haven’t seen any information on this sort of thing on the website anywhere. Thanks!

Scott

Reply

Nicholas Hamilton 3/04/2016 | 11:21

You need to digitise the data. Which is not a trivial process.

Reply

Scott 4/04/2016 | 5:57

I’ve already extracted the data into .csv format, but I’m not quite sure how to organize it for input with ggtern or even how to begin the coding – at the moment it’s a dataframe with the 198 rows and 8 columns from the publication. Unfortunately, due to its peculiar structure (if you can see the article, you’ll know what I mean), it’s not something that can really be shared on GitHub etc. effectively. I’d gladly post it somewhere, if you have a suggestion on how.

Reply

Nicholas Hamilton 5/04/2016 | 12:42

Scott, Email me directly, nick at ggtern dot com

Reply

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