R help - Nov 2013 - Real frequencies in a 'set' problem

I have three media channels where I can push public health information (tv,
radio and newspaper). Any given citizen can be touched by the information
from one, two or three channels (let's ignore for the moment that citizens
might miss the information all together). Hence these sets:

 library(sets)

 tv <- set(1, 4, 7, 6)
 radio <- set(6, 7, 5, 2)
 newspaper <- set(4, 7, 5, 3)

Now I want to know how many citizens that newspapers bring to the complete
body of informed citizens. E.g. how many people gets the information ONLY
from a newspaper:

 (tv | radio | t) - (tv | radio)

But how do I solve this if I know that

220 people is reached via tv
349 people is reached vi radio
384 people is reached via newspaper

97 people is reached via tv and radio
173 people is reached via radio and newspaper
134 people is reached via newspaper and tv

It's the grey area of the (dummy) plot below that I would like to put a
frequency in

 library(VennDiagram)

 draw.triple.venn(area1 = 10,
   area2 = 10,
   area3 = 10,
   n12 = 3,
   n13 = 3,
   n23 = 3,
   n123 = 1,
   category = c('TV', 'Radio', 'Newspaper'),
   fill = c('white', 'white', 'grey'),
   alpha = c(1, 1, 0)
 )

I don't understand how the frequencies that I know is supposed to be used
in the 'sets' notation. Or am I completely misunderstanding something
here?
Wouldn't be the first time if I did...

TIA

	[[alternative HTML version deleted]]

On Nov 13, 2013, at 1:35 PM, Stefan Petersson wrote:
> I have three media channels where I can push public health information (tv,
> radio and newspaper). Any given citizen can be touched by the information
> from one, two or three channels (let's ignore for the moment that
citizens
> might miss the information all together). Hence these sets:
> 
> library(sets)
> 
> tv <- set(1, 4, 7, 6)
> radio <- set(6, 7, 5, 2)
> newspaper <- set(4, 7, 5, 3)
> 
> Now I want to know how many citizens that newspapers bring to the complete
> body of informed citizens. E.g. how many people gets the information ONLY
> from a newspaper:
> 
> (tv | radio | t) - (tv | radio)
> 
> But how do I solve this if I know that
> 
> 220 people is reached via tv
> 349 people is reached vi radio
> 384 people is reached via newspaper
> 
> 97 people is reached via tv and radio
> 173 people is reached via radio and newspaper
> 134 people is reached via newspaper and tv
> 
> It's the grey area of the (dummy) plot below that I would like to put a
> frequency in
> 
> library(VennDiagram)
> 
> draw.triple.venn(area1 = 10,
>   area2 = 10,
>   area3 = 10,
>   n12 = 3,
>   n13 = 3,
>   n23 = 3,
>   n123 = 1,
>   category = c('TV', 'Radio', 'Newspaper'),
>   fill = c('white', 'white', 'grey'),
>   alpha = c(1, 1, 0)
> )
> 
> I don't understand how the frequencies that I know is supposed to be
used
> in the 'sets' notation. Or am I completely misunderstanding
something here?
> Wouldn't be the first time if I did...
> 
Is there any reason for us to think this isn't homework? Have you read the
Posting Guide?

> TIA
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
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David Winsemius
Alameda, CA, USA