Off topic:Extracting value from csv file with condition using if else and & operator

Question

[shawin]

I have a csv file and I would like to extract the value of it with specific range for example; F>2 & F<2 & P=1, and then write the result to csv file.

I tried the code bellow but , it does not work?

FCPval <- read.csv("C:/Users/shawin/Desktop/RProgramms/RAdipose/FCPval.csv")
c=as.data.frame(FCPval)
for (i in 1:rowN){if (C$F[i] >= 2 && C$F[i]<=-2&& C$p[i]<=3){
  dfrmPFC=data.frame(Fc=FC,p=p)}
}

The error is:

Error in C$FC : object of type 'closure' is not subsettable