subset - Getting variable names of desired values in R -

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my data (group) has 300 variables showing group belong in second row..there total of 6 groups

2017 2766 1737 1745 1747 1883 1884 1821 1900 ...... 3    4    6    3    3    3    3    3    3    ......

if this:

group=="6"

it show if variables true or false if belong group 6 below

2017  2766  1737 1745  1747  1883  1884  1821  1900  .............. false false true false false false false false false ..............

i trying list out variables belong individual group.
example want ask variables belong group 6

i tried gave null results:

names(group=="6")

i want save names csv.

try

colnames(group)[which(group=="6")]

when group data.frame or else

names(group)[which(group=="6")]

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