# Re: [R] read.frame

From: <DJNordlund_at_aol.com>
Date: Thu 08 Jul 2004 - 15:35:07 EST

In a message dated 7/7/2004 9:42:03 PM Pacific Daylight Time, biocperi@yahoo.com writes:

Dear Alec,
Thank you for your response and it worked. Further, I have another mathematical problem. I apologize ahead as this question is not apt for this list. I am a biologist working at Johns Hopkins School of Medicine.

As I listed in my previous e-mail (attached below)I mentioned I have 4 protein sets. I am now trying to calculate the combinatorics of these sets. My ultimate aim is to draw a venn diagram and find out the proteins that are unique to set C,S,E and H. I drew a venn diagram graph and I am banging my head to deduce the combinations. It is easy for me to deduce the intersections - that means the protein entries that are present in common. However, it proved very difficult to deduce the following:

I could calculate the following:

```NP_*** present in both C and E (C intersection  E)
NP_*** present in both C and H (C intersection H)
NP_*** present in  both C and S (C ^ S)
NP_*** present in both E and H (E ^ H)
NP_***  present in both E and S (E ^ S)
NP_*** present in both H and S (H ^  S)

NP_*** present in C, E and H (C^E^H)
NP_*** present in C, H and S  (C^H^S)
```

NP_*** present in E, H and S (E^H^S)
NP_*** present in E, S and C (E^S^C)

It is very difficult for me to deduce the following:

```NP_**** entries specific to E
NP_**** entries specific to  H
NP_**** entries specific to S

```

I am not sure about your notation, but in R terms, if you want the items specific to E, H, or S, how about something like:

specific to E -- setdiff(e, union(c,union(h,s)))

specific to H -- setdiff(h, union(c,union(e,s)))

specific to S -- setdiff(s, union(c,union(e,h)))

Dan Nordlund

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