Tania Morgado Garcia tmg1970 @ending from gm@il@com
Mon Sep 24 19:37:12 CEST 2018

```Thanks for your answers. I continue to learn R and now I am detained in an
error with uniroot that I see happens to others but I can not find the
solution. Next the code

x1 <- BAaxOrd\$V1
y1 <- BAaxOrd\$V2
x1R <- BAaxOrdRCOS\$V1
y1R <- BAaxOrdRCOS\$V2
FCOS1 <- splinefun(smooth.spline(x1,y1))
FRCOS1 <- splinefun(smooth.spline(x1R,y1R))
FCOS1 <- Vectorize(FCOS1)
FRCOS1 <- Vectorize(FRCOS1)

req(input\$file1)
tryCatch(
{
sep = "\t",
quote = '"')
},
error = function(e) {
# return a safeError if a parsing error occurs
stop(safeError(e))
}
)

#}
#else {

# Determine Carbon Reserve
for (row in 1:nrow(df)) {
if(df\$ts==1) {
prof <-
uniroot(f=function(x){FCOS1(x1)-df\$carbono},interval=c(0,20))\$root
limsup <- prof + df\$pu
reserva <- integrate(FRCOS1,prof,limsup)\$value
}

The if is because there are several types of soil, but I only put one.  The
error is

Warning in if (is.na(f.lower)) stop("f.lower = f(lower) is NA") :
the condition has length > 1 and only the first element will be used
Warning in if (is.na(f.upper)) stop("f.upper = f(upper) is NA") :
the condition has length > 1 and only the first element will be used
Warning: Error in uniroot: f() values at end points not of opposite sign

The file that I load with data has a single row with the values ts = 1,
carbon = 2.04 and pu = 15 (I left only that row to be able to determine the
origin of the error). The functions FCOS1 and FRCOS1 are monotone
decreasing.Graphic attachment of FCOS1

I would appreciate some help in this regard

thanks a lot
```