R: using expression in plot legends - r

I'm trying to use the legend function in R. I want the label to read $\alpha = 1, \beta = 2$, so I tried using
legend("topleft", c(expression(alpha = 1, beta = 2)))
But that did not do the trick. Any advice?
What if I wanted my label to read $Gamma(\alpha = 1, \beta = 2)$? I tried
legend("topleft", c(paste("Gamma( ", expression(alpha = 1, beta = 2))))

We can place everything within the expression itself
plot(1)
legend("topleft", expression(alpha~"= 1, "~beta~" = 2"))
If we need Gamma(
legend("topleft", expression(Gamma*"("*alpha~"= 1, "~beta~" = 2)"))
If we need the word Gamma
legend("topleft", expression("Gamma("*alpha~"= 1, "~beta~" = 2)"))

Another option is str2lang, which allows using variables
{
one<-1
two<-2
greek<-"Gamma"
greek1<-"alpha"
greek2<-"beta"
note <- paste0(greek,"*'('*",greek1,"*' = ",one,", '*",greek2,"*' = ",two,")' " )
plot(1)
legend("topleft", legend=str2lang(paste0("paste(",note,")") ) )
}

Related

For-loop to dynamically change plot title

I have 5 variables which want to plot and export in one pdf. However, I have some trouble wiht the for-loop I am running,
parC <-list(unit = 100,labelx = "Time",labely = "Time",cols = "black",
pcex = .01, pch = 1,las = 1,
labax = seq(0,nrow(RP),100),
labay = seq(0,nrow(RP),100))
pdf("filename.pdf", onefile=TRUE)
for (i in RP_values){ # the values that are plotted
for (j in name) { # name is a list of names, so that the title changes dynamically
plotting(i, parC, j)
}
}
dev.off()
RP_values = list of values that is plotted
name = list of names to dynamically change the plotting title
plotting = an adjusted version from the plotRP() function of the crqa package. Here I added a main title to the plot.
The code for the plotting() function:
plotting <- function(RP, par, x){
if (exists("par") == FALSE){ # we use some defaults
## default values
unit = 2; labelx = "Time"; labely = "Time"
cols = "black"; pcex = .3; pch = 1; las = 0;
labax = seq(0, nrow(RP), unit); labay = seq(0, nrow(RP), unit);
} else { # we load the values that we desire
for (v in 1:length(par)) assign(names(par)[v], par[[v]])
}
xdim = nrow(RP)
ydim = ncol(RP)
RP = matrix(as.numeric(RP), nrow = xdim, ncol = ydim) # transform it for plotting
ind = which(RP == 1, arr.ind = T)
tstamp = seq(0, xdim, unit)
par(mar = c(5,5, 1, 3), font.axis = 2, cex.axis = 1,
font.lab = 2, cex.lab = 1.2)
plot(tstamp, tstamp, type = "n", xlab = "", ylab = "", xaxt = "n", yaxt = "n", main = x)
matpoints(ind[,1], ind[,2], cex = pcex, col = cols, pch = pch)
mtext(labelx, at = mean(tstamp), side = 1, line = 2.2, cex = 1.2, font = 2)
mtext(labely, at = mean(tstamp), side = 2, line = 2.2, cex = 1.2, font = 2)
# if (is.numeric(labax)){ ## it means there is some default
# mtext(labax, at = seq(1, nrow(RP), nrow(RP)/10), side = 1, line = .5, cex = 1, font = 2)
# mtext(labay, at = seq(1, nrow(RP), nrow(RP)/10), side = 2, line = .5, cex = 1, font = 2)
# } else{
mtext(labax, at = tstamp, side = 1, line = .5, cex = .8, font = 2, las = las)
mtext(labay, at = tstamp, side = 2, line = .5, cex = .8, font = 2, las = las)
# }
}
My problem is instead of 5 plots I get 25, where each plot appears 5 times, but with a different title. If I do not include the "j" part everything works fine, but of course do not have any main title for each plot.
I appreciate any help.
Best,
Johnson
From your description and comments, it appears you need an elementwise loop and not a nested loop. Consider retrieving all pairwise combinations of names and RP_values with expand.grid and iterate through them with mapply. Also, since parC depends on nrows of corresponding RP, have parC defined inside function for only two parameters (with more informative names like title instead of x):
plotting <- function(RP, title) {
parC <- list(unit=100, labelx="Time", labely="Time",
cols="black", pcex=.01, pch=1, las=1,
labax=seq(0, nrow(RP), 100),
labay=seq(0, nrow(RP), 100))
...
plot(tstamp, tstamp, type="n", xlab="", ylab="",
xaxt="n", yaxt="n", main=title)
...
}
params <- expand.grid(RP_values=RP_values, name=name)
out <- mapply(plotting, RP=params$RP_values, title=params$name)

R: How to plot multiple ARIMA forecasts on the same time-series

I would like to plot several forecasts on the same plot in different colours, however, the scale is off.
I'm open to any other methods.
reproducible example:
require(forecast)
# MAKING DATA
data <- c(3.86000, 19.55810, 19.51091, 20.74048, 20.71333, 29.04191, 30.28864, 25.64300, 23.33368, 23.70870 , 26.16600 ,27.61286 , 27.88409 , 28.41400 , 24.81957 , 24.60952, 27.49857, 32.08000 , 29.98000, 27.49000 , 237.26150, 266.35478, 338.30000, 377.69476, 528.65905, 780.00000 )
a.ts <- ts(data,start=c(2005,1),frequency=12)
# FORECASTS
arima011_css =stats::arima(x = a.ts, order = c(0, 1, 1), method = "CSS") # css estimate
arima011_forecast = forecast(arima011_css, h=10, level=c(99.5))
arima321_css =stats::arima(x = a.ts, order = c(3, 2, 1), method = "CSS") # css estimate
arima321_forecast = forecast(arima321_css, h=10, level=c(99.5))
# MY ATTEMPT AT PLOTS
plot(arima321_forecast)
par(new=T)
plot(arima011_forecast)
Here is something similar to #jay.sf but using ggplot2.
library(ggplot2)
autoplot(a.ts) +
autolayer(arima011_forecast, series = "ARIMA(0,1,1)", alpha = 0.5) +
autolayer(arima321_forecast, series = "ARIMA(3,2,1)", alpha = 0.5) +
guides(colour = guide_legend("Model"))
Created on 2020-05-19 by the reprex package (v0.3.0)
You could do a manual plot using a sequence of dates.
rn <- format(seq.Date(as.Date("2005-01-01"), by="months", length.out=12*3), "%Y.%m")
Your ARIMAs you'll need as.matrix form.
arima321_mat <- as.matrix(as.data.frame(arima321_forecast))
arima011_mat <- as.matrix(as.data.frame(arima011_forecast))
Some colors with different alpha=.
col.1 <- rainbow(2, ,.7)
col.2 <- rainbow(2, ,.7, alpha=.2)
For the CIs use polygon.
plot(data, type="l", xlim=c(1, length(rn)), ylim=c(0, 3500), xaxt="n", main="Forecasts")
axis(1, axTicks(1), labels=F)
mtext(rn[(seq(rn)-1) %% 5 == 0], 1, 1, at=axTicks(1))
lines((length(data)+1):length(rn), arima321_mat[,1], col=col.1[1], lwd=2)
polygon(c(27:36, 36:27), c(arima321_mat[,2], rev(arima321_mat[,3])), col=col.2[1],
border=NA)
lines((length(data)+1):length(rn), arima011_mat[,1], col=col.1[2], lwd=3)
polygon(c(27:36, 36:27), c(arima011_mat[,2], rev(arima011_mat[,3])), col=col.2[2],
border=NA)
legend("topleft", legend=c("ARIMA(3,2,1)", "ARIMA(0,1,1)"), col=col.1, lwd=2, cex=.9)
Edit: To avoid the repetition of lines and polygon calls, you may unite them using Map.
mats <- list(arima321_mat, arima011_mat) ## put matrices into list
plot(.)
axis(.)
mtext(.)
Map(function(i) {
lines((length(data)+1):length(rn), mats[[i]][,1], col=col.1[i], lwd=2)
polygon(c(27:36, 36:27), c(mats[[i]][,2], rev(mats[[i]][,3])), col=col.2[i], border=NA)
}, 1:2)
legend(.)
require(forecast)
data <- c(3.86000, 19.55810, 19.51091, 20.74048, 20.71333, 29.04191, 30.28864, 25.64300, 23.33368, 23.70870 , 26.16600 ,27.61286 , 27.88409 , 28.41400 , 24.81957 , 24.60952, 27.49857, 32.08000 , 29.98000, 27.49000 , 237.26150, 266.35478, 338.30000, 377.69476, 528.65905, 780.00000 )
a.ts <- ts(data,start=c(2005,1),frequency=12)
arima011_css =stats::arima(x = a.ts, order = c(0, 1, 1), method = "CSS") # css estimate
arima011_forecast = predict(arima011_css, n.ahead = 2)$pred
arima321_css =stats::arima(x = a.ts, order = c(3, 2, 1), method = "CSS") # css estimate
arima321_forecast = predict(arima321_css, n.ahead = 2)$pred
plot(a.ts, type = "o", xlim = c(2005, 2007.5) , ylim = c(-1, 1200) , ylab = "price" ,main = "2 month Forecast")
range = c(2007+(3/12), 2007+(4/12)) # adding the dates for the prediction
lines(y = arima011_forecast , x = range , type = "o", col = "red")
lines(y = arima321_forecast, x = range , type = "o", col = "blue")

How to change the color and width of lines with par function in R

I have a question about the par function in R.
I want to change the color and/or width of a line in a graph with par function. (I am using par function because the gaps.plot command below does not allow "col" option to be included. The gaps.plot command is used after the synth command).
So, I used the following command. But I noticed that the lines of the BOX are changed rather than the lines of the GRAPHS.
synth1<-read.csv(file="C:\\Users\\Research\\R\\synthinR_v4.csv",header=TRUE)
attach(synth1)
library("Synth")
dataprep.out34 <- dataprep(foo = synth1, predictors = c("lncdsales", "md1", "md2","md3", "md4", "md5", "md6", "md7", "md8", "md9", "md10", "md11", "yd1", "yd2", "yd3", "yd4", "yd5", "yd6", "yd7", "yd8"), predictors.op = "mean", time.predictors.prior = -13:1, dependent = "lndigital", unit.variable = "artistalbumcode", time.variable = "release", treatment.identifier = 34, controls.identifier = c(1:33, 35:49), time.optimize.ssr = -13:1, time.plot = -13:25)
synth.out34 <- synth(data.prep.obj = dataprep.out34, method = "BFGS")
par(lwd = 2, col="#cccccc")
gaps.plot(synth.res = synth.out34, dataprep.res = dataprep.out34, Ylab = " Log Digital Sales ", Xlab = "Release", Ylim = c(-7, 7) , Main = NA)
Does anyone know how to fix this problem??
Thank you in advance for your willingness to help. I greatly appreciate it!
The col argument to par sets the default plotting colour (i.e. when col is not explicitly specified in plotting calls), but unfortunately col = "black" is hard-coded into the source of gaps.plot.
You can make a modified copy of the function by either (1) viewing the source (F2 in RStudio, or just executing gaps.plot), editing it and assigning it to a new object, or (2) doing something like the following:
gaps.plot2 <- eval(parse(text=gsub('col = "black"', 'col = "red"',
deparse(Synth:::gaps.plot))))
and then using gaps.plot2 as you would use gaps.plot:
gaps.plot2(synth.res = synth.out34, dataprep.res = dataprep.out34,
Ylab = " Log Digital Sales ", Xlab = "Release", Ylim = c(-7, 7) ,
Main = NA)
Alter the lwd similarly. For example to make lines red and have width of 3, use nested gsub calls like this:
gaps.plot2 <- eval(parse(text=gsub('lwd = 2', 'lwd = 3',
gsub('col = "black"', 'col = "red"',
deparse(Synth:::gaps.plot)))))

labeling points on an archetype archmap

How might one add labels to an archmap from the archetypes package? Or alternatively, would it be possible to recreate the archmap output in ggplot?
Using code from the SportsAnalytics demo (I hope this isn't bad form)
library("SportsAnalytics")
library("archetypes")
data("NBAPlayerStatistics0910")
dat <- subset(NBAPlayerStatistics0910,
select = c(Team, Name, Position,
TotalMinutesPlayed, FieldGoalsMade))
mat <- as.matrix(subset(dat, select = c(TotalMinutesPlayed, FieldGoalsMade)))
a3 <- archetypes(mat, 3)
archmap(a3)
I'd like the player names ( NBAPlayerStatistics0910$Name ) over the points on the chart. Something like below but more readable.
If you don't mind tweaking things a bit, you can start with the archmap() function base, toss in an extra parameter and add a text() call:
amap2 <- function (object, a.names, projection = simplex_projection, projection_args = list(),
rotate = 0, cex = 1.5, col = 1, pch = 1, xlab = "", ylab = "",
axes = FALSE, asp = TRUE, ...)
{
stopifnot("archetypes" %in% class(object))
stopifnot(is.function(projection))
k <- object$k
if (k < 3) {
stop("Need at least 3 archetypes.\n")
}
cmds <- do.call(projection, c(list(parameters(object)), projection_args))
if (rotate != 0) {
a <- pi * rotate/180
A <- matrix(c(cos(a), -sin(a), sin(a), cos(a)), ncol = 2)
cmds <- cmds %*% A
}
hmds <- chull(cmds)
active <- 1:k %in% hmds
plot(cmds, type = "n", xlab = xlab, ylab = ylab, axes = axes,
asp = asp, ...)
points(coef(object) %*% cmds, col = col, pch = pch)
######################
# PLAY WITH THIS BIT #
######################
text(coef(object) %*% cmds, a.names, pos=4)
######################
rad <- ceiling(log10(k)) + 1.5
polygon(cmds[hmds, ])
points(cmds[active, ], pch = 21, cex = rad * cex, bg = "grey")
text(cmds[active, ], labels = (1:k)[active], cex = cex)
if (any(!active)) {
points(cmds[!active, , drop = FALSE], pch = 21, cex = rad *
cex, bg = "white", fg = "grey")
text(cmds[!active, , drop = FALSE], labels = (1:k)[!active],
cex = cex, col = "grey20")
}
invisible(cmds)
}
amap2(a3, dat$Name)
Obviously, my completely quick stab is not the end result you're looking for, but it should help you get on your way (if I read what you want to do correctly).

Adding title to the plot function as a list in R

I am using this code for plotting list of variables in a single page:
plot30 <- list(HMn25_30,HMn28_30,HMn29_30,HMn31_30,HMn32_30)
par(mfrow=c(2,3))
for (i in plot30) {
plot(i, type = "o", pch = 16, lty = 2, col = "Black", xlab = "Hour 2007/09/30" , ylab = "Ambient Tempreture")
}
Result of this code:
I wanted to add titles such as {Node 25,Node 28,Node 29,Node 31,Node 32} to the plots.
Any suggestion?
try to add the following in your for loop
plot30 <- list(HMn25_30,HMn28_30,HMn29_30,HMn31_30,HMn32_30)
Main <- c('Node 25','Node 28','Node 29','Node 31','Node 32')
par(mfrow=c(2,3))
for (i in seq_along(plot30)) {
plot(plot30[[i]], type = "o", pch = 16, lty = 2, col = "Black", xlab = "Hour 2007/09/30" , ylab = "Ambient Tempreture", main=Main[i])
}
This is the construct you should expand from:
plot30 <- list(myplot)
names(plot30)<- c('myplot1')
for (i in seq_along(plot30) ) {pname <- names(plot30)[i]
plot(plot30[i], main=pname)
}

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