# sign: Sign of LR fuzzy number In Calculator.LR.FNs: Calculator for LR Fuzzy Numbers

## Description

To distinguish and determining the sign of a LR fuzzy number one can use from this function. In other words, the function `sign` is able to categorize the class of all LR fuzzy numbers into three kinds positive, negative and non of them (non-positive and non negative).

## Usage

 `1` ```sign(M) ```

## Arguments

 `M` A LR, RL or L fuzzy number

## Value

The "sign" function only return three charactical values: "Positive", "Negative" or "non-positive and non negative".

Abbas Parchami

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26``` ```Left.fun = function(x) { (1-x)*(x>=0)} M = L(2,4,3) support(M) sign(M) sign( L(5,4,3) ) ( sign( L(5,4,3) ) == "Positive" ) ## The function is currently defined as function (M) { supp = support(M) if (supp > 0) { return(noquote(paste0("Positive"))) } else { if (supp < 0) { return(noquote(paste0("Negative"))) } else { return(noquote(paste0("non-positive and non negative"))) } } } ```

Calculator.LR.FNs documentation built on May 2, 2019, 8:25 a.m.