Question: I've developed a project and set its deployment target 10.3. I then gave project to client who have iphone 7 plus and ios 10.3. This is working on his device. I gave the same product to another friend who have iphone 5 and ios version lower than 10. App is not running on iPhone 5. That device is saying that the app has minimum deployment target 10.3. I'm very much confused about deployment target. How could I manage those things for all devices and ios versions? Please anyone help me.

Answer: 
you could try to add a plotCI-plot:

```
library(vegan) 
library(plotrix) 
data("dune")
result <- specaccum(dune)

plot(result)
plotCI(result$sites,result$richness,result$sd*2,err="y", lwd=2,add=TRUE, pch=NA)

```

I admit this is also not the most elegant option as well but it works.
The **vegan** repository in [github](https://github.com/vegandevs/vegan/) has now an option for drawing those short horizontal bars to the error bars with argument `ci.length`. The default is zero (no horizontal bars) to preserve the old behaviour.