Error(s) in re-building vignettes:
  ...
--- re-building 'prospectr-intro.Rnw' using knitr
Loading required package: RcppArmadillo
 ----------- FAILURE REPORT -------------- 
 --- failure: the condition has length > 1 ---
 --- srcref --- 
: 
 --- package (from environment) --- 
prospectr
 --- call from context --- 
standardNormalVariate(X = NIRsoil$spc)
 --- call from argument --- 
if (!class(X) %in% c("matrix", "data.frame")) stop("X should be a matrix or data.frame")
 --- R stacktrace ---
where 1: standardNormalVariate(X = NIRsoil$spc)
where 2: eval(expr, envir, enclos)
where 3: eval(expr, envir, enclos)
where 4: withVisible(eval(expr, envir, enclos))
where 5: withCallingHandlers(withVisible(eval(expr, envir, enclos)), warning = wHandler, 
    error = eHandler, message = mHandler)
where 6: handle(ev <- withCallingHandlers(withVisible(eval(expr, envir, 
    enclos)), warning = wHandler, error = eHandler, message = mHandler))
where 7: timing_fn(handle(ev <- withCallingHandlers(withVisible(eval(expr, 
    envir, enclos)), warning = wHandler, error = eHandler, message = mHandler)))
where 8: evaluate_call(expr, parsed$src[[i]], envir = envir, enclos = enclos, 
    debug = debug, last = i == length(out), use_try = stop_on_error != 
        2L, keep_warning = keep_warning, keep_message = keep_message, 
    output_handler = output_handler, include_timing = include_timing)
where 9: evaluate::evaluate(...)
where 10: evaluate(code, envir = env, new_device = FALSE, keep_warning = !isFALSE(options$warning), 
    keep_message = !isFALSE(options$message), stop_on_error = if (options$error && 
        options$include) 0L else 2L, output_handler = knit_handlers(options$render, 
        options))
where 11: in_dir(input_dir(), evaluate(code, envir = env, new_device = FALSE, 
    keep_warning = !isFALSE(options$warning), keep_message = !isFALSE(options$message), 
    stop_on_error = if (options$error && options$include) 0L else 2L, 
    output_handler = knit_handlers(options$render, options)))
where 12: block_exec(params)
where 13: call_block(x)
where 14: process_group.block(group)
where 15: process_group(group)
where 16: withCallingHandlers(if (tangle) process_tangle(group) else process_group(group), 
    error = function(e) {
        setwd(wd)
        cat(res, sep = "\n", file = output %n% "")
        message("Quitting from lines ", paste(current_lines(i), 
            collapse = "-"), " (", knit_concord$get("infile"), 
            ") ")
    })
where 17: process_file(text, output)
where 18: (if (grepl("\\.[Rr]md$", file)) knit2html_v1 else if (grepl("\\.[Rr]rst$", 
    file)) knit2pandoc else knit)(file, encoding = encoding, 
    quiet = quiet, envir = globalenv(), ...)
where 19: engine$weave(file, quiet = quiet, encoding = enc)
where 20: doTryCatch(return(expr), name, parentenv, handler)
where 21: tryCatchOne(expr, names, parentenv, handlers[[1L]])
where 22: tryCatchList(expr, classes, parentenv, handlers)
where 23: tryCatch({
    engine$weave(file, quiet = quiet, encoding = enc)
    setwd(startdir)
    output <- find_vignette_product(name, by = "weave", engine = engine)
    if (!have.makefile && vignette_is_tex(output)) {
        texi2pdf(file = output, clean = FALSE, quiet = quiet)
        output <- find_vignette_product(name, by = "texi2pdf", 
            engine = engine)
    }
    outputs <- c(outputs, output)
}, error = function(e) {
    thisOK <<- FALSE
    fails <<- c(fails, file)
    message(gettextf("Error: processing vignette '%s' failed with diagnostics:\n%s", 
        file, conditionMessage(e)))
})
where 24: tools:::buildVignettes(dir = "/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/prospectr.Rcheck/vign_test/prospectr", 
    ser_elibs = "/tmp/RtmpwN1MZn/file4f4765a3a21.rds")

 --- value of length: 2 type: logical ---
[1] FALSE  TRUE
 --- function from context --- 
function (X) 
{
    if (!class(X) %in% c("matrix", "data.frame")) 
        stop("X should be a matrix or data.frame")
    X <- sweep(X, 1, rowMeans(X, na.rm = T), "-")
    X <- sweep(X, 1, apply(X, 1, sd, na.rm = T), "/")
    return(X)
}
<bytecode: 0x6061560>
<environment: namespace:prospectr>
 --- function search by body ---
Function standardNormalVariate in namespace prospectr has this body.
 ----------- END OF FAILURE REPORT -------------- 
Quitting from lines 250-251 (prospectr-intro.Rnw) 
Error: processing vignette 'prospectr-intro.Rnw' failed with diagnostics:
the condition has length > 1
--- failed re-building 'prospectr-intro.Rnw'

SUMMARY: processing the following file failed:
  'prospectr-intro.Rnw'

Error: Vignette re-building failed.
Execution halted