I have a data frame and I would like to reshape it to wide format while at the same time applying different aggregate functions to each column AND at times multiple aggregate functions: 
  
test1 = data.frame( 
        id = c(rep('101',8),rep('102',8)), 
        phase  = rep(c('D','D','L','L'),4), 
        day = rep(c('1','1','1','1','2','2','2','2'),2), 
        col1 = c(rep(1,8),rep(2,8)), 
        col2 = c(runif(8,min=0,max=1),runif(8,min=0,max=10)) 
        ) 

In this example, I would like to end up with 2 rows (for the 2 ids) and different columns for phase-day. Values of col1 
should just be summed and for col 2 there should be a column with the 
mean AND one with standard deviation for each phase-day combination. 

Obviously the real data have much more number of columns therefore I guess I will need to provide a list of functions? 

Thank you in advance! 

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