sp2 - 1 month ago 5x

R Question

I have a file containing, multiple rows as follows

In file1:

`a 8|2|3|4 4`

b 2|3|5|6|7 5

c 8|5|6|7|9 5

a to a has 4 overlaps, similarly a to b had 2 overlaps, so to check the overlaps between various entity,I need to generate a matrix with the above details, and the output should be a matrix like

`a b c`

a 4 2 1

b 2 5 3

c 1 3 5

Please give me a suggestion, how to do this? this there anyway to do this using excel or using a shell script or using R? I have written this following code but since I am not a good coder, cudn't get the output printed in a right format.

`setwd('C:\\Users\\Desktop\\')`

newmet1<-file("file.txt")

newmet2<-strsplit(readLines(newmet1),"\t")

Newmet<-sapply(newmet2, function(x) x[2:length(x)], simplify=F )

for (i in 1:length(Newmet))

{

for (j in 1:length(Newmet)

{

c <- ((intersect(Newmet[[i]], Newmet[[j]]))

print (length(c))

}

}

Answer

If the numbers are in separate cells starting in Sheet1!A1, try

```
=SUM(--ISNUMBER(MATCH(Sheet1!$A3:$E3,INDEX(Sheet1!$A$1:$E$3,COLUMN(),0),0)))
```

starting at Sheet2!A1.

Must be entered as an array formula using `Ctrl``Shift``Enter`

Alternative formula that doesn't have to start at Sheet2!A1

```
SUM(--ISNUMBER(MATCH(Sheet1!$A1:$E1,INDEX(Sheet1!$A$1:$E$3,COLUMNS($A:A),0),0)))
```

Source (Stackoverflow)

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