How to split vector with strings

Question

I have a vector with gene names where several elements in the vector contains more than one gene name, separated with a comma. How can I separate the elements of this vector and get a long vector with each gene name as a separate element of the vector? I have tried strsplit but that just give me the two or more gene names as separated strings but still in the same element of the vector... /Frida

genes = c("PGD", "CDA", "MROH7,TTC4", "PGM1")

and I want to separate the element "MROH7,TTC4" into the two elements "MROH7" and "TTC4"

Welcome on SO. Could you please provide an reproducible example. — sgibb
– sgibb, Commented May 21, 2014 at 19:42
Hi,the vector looks like this: genes = ("PGD", "CDA", "MROH7,TTC4", "PGM1") and I want to separate the element "MROH7,TTC4" into the two elements "MROH7" and "TTC4". — user3346285
– user3346285, Commented May 21, 2014 at 19:45

eipi10 · Accepted Answer · 2014-05-23 19:08:47Z

9

This will split your string at every comma:

genes = c("PGD", "CDA", "MROH7,TTC4", "PGM1")
genes.split = unlist(strsplit(genes, ","))

genes.split
[1] "PGD"   "CDA"   "MROH7" "TTC4"  "PGM1"

edited May 23, 2014 at 19:08

answered May 21, 2014 at 19:43

eipi10

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Matthew Plourde · Accepted Answer · 2014-05-22 03:58:38Z

4

Another option is scan, which will also eat white space.

scan(text=genes, what='', sep=',', strip.white=TRUE)

edited May 22, 2014 at 3:58

answered May 21, 2014 at 19:50

Matthew Plourde

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