LAE

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Originally posted by: raylee

The setup instructions for the R node says to install the jpeg and png R packages. In R I can write images to do. How do I use the package in LAE?

Assume I have an output pin called myOutput. If I do the following:

myOutput <- hist(data$age)

I get an error saying: Variable "myOutput" for output 1 not of class "data.frame" or "laeImage".

I'm also curious how this laeImage works.

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Originally posted by: ejones

Use createImage() to do this. As soon as you call it the images will go to that specified output pin. See the Node Help for more details.

Here is an example which is a modification of code in "An Introduction to R" r-intro.pdf page 21. First create an R node with three outputs named outD, outFr and thePlot. Then use the following code for the RScript. This example is also attached.

d <- outer(0:9, 0:9)
outD <- data.frame(d)

fr <- table(outer(d, d, "-"))
outFr <- data.frame(fr)

createImage("thePlot")
plot(as.numeric(names(fr)), fr, type="h",
xlab="Determinant", ylab="Frequency")
Attachments:
RNodeJpeg.brg

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Originally posted by: dsc88dsc88

For those interested, here is a more colourful example image:


node:Example_R_Chart_Image
bretype:r::R
editor:Label=Example R Chart Image
editor:sortkey=5346787d2ba16e34_9
input:5346787f7311612a/myInput=Static_Data_2.40fe6c55598828e5
output:5346790939853e75/ExampleImage=
prop:RScript=<<EOX
# Display the Student's t distributions with various degrees of freedom and compare to the normal distribution

x <- seq(-4, 4, length=1000)
hx <- dnorm(x)
outD <- data.frame(hx)

degf <- c(1, 3, 8, 30)
colors <- c("red", "blue", "darkgreen", "gold", "black")
labels <- c("df=1", "df=3", "df=8", "df=30", "normal")
outFr <- data.frame(degf)

createImage("ExampleImage")
plot(x, hx, type="l", lty=2, xlab="x value",
ylab="Density", main="Comparison of t Distributions")

for (i in 1:4){
lines(x, dt(x,degf[i]), lwd=2, col=colors[i])
}

legend("topright", inset=.05, title="Distributions",
labels, lwd=2, lty=c(1, 1, 1, 1, 2), col=colors)

EOX
editor:XY=390,340
end:Example_R_Chart_Image

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Originally posted by: dsc88dsc88

For the above - I would like to clarify that the node above can be connected to the default Static Data node.

For those that do not have R configured, the attached image shows what the chart looks like.

Example_R_Chart_Image.jpg