plot error when points/lines have different date values to main plot

[stewart123579]

Description

Plotting (with lines/points) a second set of data that is at different time points (i.e. xts2 below is 60 days between data points) to the first dataset (xts1 has 90 days between observations) results in the error:

Error in xy.coords(x, y) : 'x' and 'y' lengths differ

Expected behavior

Both curves/points plotted on the same chart. This was the previous behaviour of XTS.

Minimal, reproducible example

library(xts)

#####
# Create some data
# 3 monthly data
x1 <- seq(from = as.Date('2000-01-01'), to = as.Date('2010-12-31'), by = 90)
n <- length(x1)
y1 <- (c(1:n) - n / 2)^3
xts1 <- xts(y1, order.by = x1)
# 2 monthly data
x2 <- seq(from = as.Date('2000-01-01'), to = as.Date('2010-12-31'), by = 60)
y2 <- (c(1:length(x2)) - n / 2)^3
xts2 <- xts(y2, order.by = x2)


#####
# Plots

# Both datasets plot properly BY THEMSELVES
# Example 1 & 2
plot(xts1)
plot(xts2)

# Example 3
# This fails - 'xts1' first causes problems for 'xts1'
plot(xts1, main = "XTS plot")
points(xts2)

# Example 4
# This fails - 'xts2' plots, but then 'xts1' fails
plot(xts2, main = "XTS plot")
points(xts1)

# Example 5
# This works
plot.default(xts1, main = "Default plot")
lines.default(xts2)

## Order seems important
# Example 6
plot(xts1)
points(xts1)   # This plot works
points(xts2, col = "red")

# Example 7
plot(xts1)
points(xts2, col = "red")
points(xts1)  # Plotting after xts2 results in the same error

Session Info

R version 3.4.2 (2017-09-28)
Platform: x86_64-apple-darwin15.6.0 (64-bit)
Running under: macOS Sierra 10.12.6

Matrix products: default
BLAS: /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/3.4/Resources/lib/libRlapack.dylib

locale:
[1] en_AU.UTF-8/en_AU.UTF-8/en_AU.UTF-8/C/en_AU.UTF-8/en_AU.UTF-8

attached base packages:
[1] graphics  grDevices utils     datasets  stats     methods   base     

other attached packages:
[1] xts_0.10-0 zoo_1.8-0 

loaded via a namespace (and not attached):
[1] compiler_3.4.2  tools_3.4.2     grid_3.4.2      lattice_0.20-35

[joshuaulrich]

Thanks for the report! I can replicate the issues using the latest development version, and the error looks vaguely familiar.

[stewart123579]

No problem. 😄

I've just checked and I don't think it is TZ related (c.f. #94).