r - automatically generate string from data frame row -

i trying create string data frame row. little example this:

df <- data.frame(name=c('bla'), firstname=c('dada'), other=c('dum')) sprintf('name:%s firstname:%s other:%s',         df[1,'name'],         df[1,'firstname'],         df[1,'other']) 

i trying create function can provide data frame argument , creates string like.

i started try sprintf can't arguments right:

sprintf(paste(sub('$',':%s',names(df)), collapse=' '), df[1,]) 

how can unlist or anyhow automatically use arguments? working solution be:

sprintf(paste(sub('$',':%s',names(df)), collapse=' '),          df[1,'name'],         df[1,'firstname'],         df[1,'other']) 

perhaps do.call help:

df <- data.frame(name=c('bla'), firstname=c('dada'), other=c('dum')) fmt <- 'name:%s firstname:%s other:%s' do.call(sprintf, c(df, fmt = fmt)) # [1] "name:bla firstname:dada other:dum"