R help - Jun 2021 - Magick Package

Hello  I'm trying to use the Magick package for animations - it has
downloaded OK but says that it was built under version 4.0.5 and that
fontconfig and x11 features are disabled.  Atm I am using R 1.4.1103   Am I
being naive in assuming that all later versions of R subsume the features
of earlier ones or is it that some packages stop being useable with later
updates?
In any event I have some code for an animation sequence which I have
downloaded from the site -Lesson 39 ? Discrete distributions in R: Part I ?
dataanalysisclassroom <https://www.dataanalysisclassroom.com/lesson39/>
 the code runs without an error message but it doesn't give the animation
sequence you see on the website
Any help suggestions appreciated   Nick Wray

######## Animation #########

# Create png files for Binomial distribution
png(file="binomial%02d.png",
width=600, height=300)

 n = 181

x = 0:181



p = 0.1

for (i in 1:5)

{

px = dbinom(x,n,p)

 plot(x,px,type="h",xlab="Random Variable X (Number of tickets in
181
days)",ylab="Probability P(X=k)",font=2,font.lab=2)

txt = paste("p=",p,sep="")

text(150,0.04,txt,col="red",cex=2)

p = p+0.2

}

dev.off()



# Combine the png files saved in the folder into a GIF #



library(magick)



binomial_png1 <- image_read("binomial01.png","x150")

binomial_png2 <- image_read("binomial02.png","x150")

binomial_png3 <- image_read("binomial03.png","x150")

binomial_png4 <- image_read("binomial04.png","x150")

binomial_png5 <- image_read("binomial05.png","x150")



frames <- image_morph(c(binomial_png1, binomial_png2, binomial_png3,
binomial_png4, binomial_png5), frames = 15)

animation <- image_animate(frames)



image_write(animation, "binomial.gif")

	[[alternative HTML version deleted]]

On 07/06/2021 5:09 a.m., Nick Wray wrote:
> Hello  I'm trying to use the Magick package for animations - it has
> downloaded OK but says that it was built under version 4.0.5 and that
> fontconfig and x11 features are disabled.  Atm I am using R 1.4.1103  
That's not an R version number.  It looks like an RStudio version 
number, which is irrelevant here:  RStudio is just an editor and front end.


  Am I
> being naive in assuming that all later versions of R subsume the features
> of earlier ones or is it that some packages stop being useable with later
> updates?
That's up to the package maintainer.  However, the magick package (note 
the lowercase name) works in current R versions.
> In any event I have some code for an animation sequence which I have
> downloaded from the site -Lesson 39 ? Discrete distributions in R: Part I ?
> dataanalysisclassroom
<https://www.dataanalysisclassroom.com/lesson39/>
>   the code runs without an error message but it doesn't give the
animation
> sequence you see on the website
> Any help suggestions appreciated   Nick Wray
> 
> ######## Animation #########
> 
> # Create png files for Binomial distribution
png(file="binomial%02d.png",
> width=600, height=300)
> 
The line above should be separated to

# Create png files for Binomial distribution

png(file="binomial%02d.png", width=600, height=300)


When I make that correction, the example works for me.

Duncan Murdoch