# [R] TRUE/FALSE

jim holtman jholtman at gmail.com
Mon Aug 9 19:16:10 CEST 2010

```most likely 'combos[e,f]' is NA; take a look at your data.  Also put

options(error=utils::recover)

in your program so that when the error occurs you can learn to use the
debugging mode to trace down the problem.

On Mon, Aug 9, 2010 at 11:38 AM, Turn & Fall <turnandfall at live.co.uk> wrote:
>
> Here is my code
>
>                # determine the DDOA measurements
>                for(e in 1:numSensors)
>                {
>                        for(f in 1:numSensors)
>                        {
>                                if((combos[e,f]==1)
>                                {
>                        # true distance between each sensor and the target
>                        truedistance[e]<-sqrt((targetX-sensorX[e])^2+(targetY-sensorY[e])^2)
>
>                        # add an error that has a N(0, sigma^2) distribution
>                        truedistance[e]<-(truedistance[e]+rnorm(1, 0, sigma))
>                                }
>                #truedistance[1] <- (truedistance[1]+50)
>
>                        #determine DDOA measurements (reference sensor is sensor #1 here)
>                index<-1
>                for(e in 1:numSensors)
>                {
>                        if(e!=r)
>                        {
>                                        measurement[index]<-(truedistance[f]-truedistance[e])
>                                                index <- (index+1)
>                        }
>                }
>
>                        }
>                                if(combos[e,f]!=1)
>                                {
>                                }
>                }
>
> combos is just a matrix containing 1's and 0's
>
> This error keeps appearing
>
> Error in if (combos[e, f] == 1) { : missing value where TRUE/FALSE needed
>
>
> Any ideas?
>
>
> --
> View this message in context: http://r.789695.n4.nabble.com/TRUE-FALSE-tp2318668p2318668.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> and provide commented, minimal, self-contained, reproducible code.
>

--
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

```