r - Rename columns in data frame using "arithmetic progression" -

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suppose i've got following data.frame composed of multiple rows (not displayed here) , 31 columns. first 1 (and should remain) labelled "gene_id" and, second way thirtieth column have weird names, follows:

 |gene_id | weird1| weird2|all_the_way_to | weird30|  |:-------|------:|------:|:--------------|-------:|  |bpk282x |      4|      1|...            |       7|  |bpk282y |      5|      2|...            |       8|  |bpk282z |      6|      3|...            |       9|

i rename 30 columns names pattern this: tpm_1, tpm_2, tpm_3, tpm_4.....tpm_30, resulting in following table: 

 |gene_id | tpm_1| tpm_2|all_the_way_to | tpm_3|  |:-------|-----:|-----:|:--------------|-----:|  |bpk282x |     4|     1|...            |     7|  |bpk282y |     5|     2|...            |     8|  |bpk282z |     6|     3|...            |     9|

i rename columns individually by:

names(data.frame) <- c("gene_id", "tpm_1", "tpm_2", "tpm_3", ..., "tpm_30")

yet wondering if there way automatize process using function employ arithmetic progression on columns' names. in other words, trying find way rename columns pattern (tpm_followed number) in name of columns "tpm_n", "tpm_n+1", "tpm_n+2", tpm_n+3", way "tpm_n+30"

you can use paste0

colnames(df) <- paste0("tpm_", 1:30)  #[1] "tpm_1"  "tpm_2"  "tpm_3"  "tpm_4"  "tpm_5"  "tpm_6"  "tpm_7"  "tpm_8" "tpm_9"  #[10]"tpm_10" "tpm_11" "tpm_12" tpm_13" "tpm_14" "tpm_15" "tpm_16" "tpm_17" "tpm_18" #[19]"tpm_19" tpm_20" "tpm_21" "tpm_22" "tpm_23" "tpm_24" "tpm_25" "tpm_26" "tpm_27" #[28] "tpm_28" "tpm_29" "tpm_30"

you can specify indexes of columns want change

colnames(df)[2:31] <- paste0("tpm_", 1:30)

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