R Studio: Why A Function Argument is Considered A Function Name -

i newcomer in r language. far have made 1 r language's function works properly. have main function (nsbeta) calls 2 functions, when arrives second function, called "pnsjacob", responses: error: not find function "vperiodyear" 1 of "pnsjacob"'s argument

nsbeta <- function() {   #postgresql connection   #data sourced postgresql   con <- dbconnect(postgresql(), user= "postgres", password="luthf1had1", dbname="my  dissertation")   rs <- dbsendquery(con,"select * tscf")   tscf <- fetch(rs, n=-1)   #disconnect   dbdisconnect(con)   # initiate variables   vertices <- tscf$vertex   vfreq <- vertextally(vertices)   vlength <- length(vfreq)   vcf <- tscf$cashflow_amount   vparam <- c(0.5,0.5,0.5,1)   # prices , jacobian after initial parameters   #  names(tscf)[9] <- "years"   #  vperiodyear <- tscf$years   vperiodyear <- tscf$period_year   vjacoboutput <- pnsjacob(vfreq, vcf, vperiodyear, vparam)   vpx <- vjacoboutput[,1]   vjacob <- vjacoboutput[,2:5] } 

and response of interpreter is:

> vjacoboutput <- pnsjacob(vfreq, vcf, vperiodyear, vparam) error: not find function "vperiodyear" 

so please knows cause please tell me .....

i sorry stupid question last night. morning, after long sleeping, after brain refreshed, find problem. since in jacobian function mistyped index bracket in array vperiodyear(count), should type vperiodyear[count].

i thought problem within calling function, find out problem within called function.

thx god!