Running examples in ‘sisal-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: plotSelected.sisal
> ### Title: Plotting Sets of Inputs Produced by Sequential Input Selection
> ### Aliases: plotSelected plotSelected.sisal plotSelected.list
> ### Keywords: hplot
> 
> ### ** Examples
> 
> library(grDevices)
> library(grid)
> toy1.2 <- list(testSisal(Mtimes=10, stepsAhead=1, dataset="tsToy"),
+                testSisal(Mtimes=10, stepsAhead=2, dataset="tsToy"))
Dataset is "tsToy"
tsToy.learn
See ?tsToy.learn for a description of the data
Predicting 1 step ahead with lags:
 [1] 0 1 2 3 4 5 6 7 8 9
Calling sisal

pruning.criterion=round robin, Mtimes=10, kfold=10, hbranches=1, max.width=1, 
q=0.165, standardize=TRUE, pruning.keep.best=TRUE, pruning.reverse=FALSE, 
use.ridge=FALSE, sp=-1
There are 10 variables and 990 samples.
There are no missing values.
================================================================================Dataset is "tsToy"
tsToy.learn
See ?tsToy.learn for a description of the data
Predicting 2 steps ahead with lags:
 [1] 0 1 2 3 4 5 6 7 8 9
Calling sisal

pruning.criterion=round robin, Mtimes=10, kfold=10, hbranches=1, max.width=1, 
q=0.165, standardize=TRUE, pruning.keep.best=TRUE, pruning.reverse=FALSE, 
use.ridge=FALSE, sp=-1
There are 10 variables and 989 samples.
There are no missing values.
================================================================================> ## Resizing enabled:
> ## - mathematical expressions in titles
> ## - extracting the integer part of input variable names
> grid.newpage()
> plotSelected(toy1.2, yLabels = c("+1", "+2"),
+              main = "Toy time series",
+              xlab = expression(paste("input variables ",
+                                      italic(y[t+l]))),
+              ylab = expression(paste("output ", italic(y[t+k]))),
+              pickIntPart = TRUE, intTransform = function(x) -x)
Error in matchData[[i]] * amount[i] : 
  non-numeric argument to binary operator
Calls: plotSelected ... <Anonymous> -> do.call -> sisalTable -> Summary.unit
Execution halted