20.1 Showing progress

You can add some code to a for loop that prints j, the iterator in a for loop.

Code

for (j in 1:100){
  cat(j, '')
  Sys.sleep(1/100)
}

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 

If you don’t want to show every new j, you can add an if statement like this that prints every 10 js for example.

Code

for (j in 1:100){
  if(j %% 10 == 0){cat(j, '')}
  Sys.sleep(1/100)
}

10 20 30 40 50 60 70 80 90 100 

Another option is to use the package progress to add a progress bar.

Code

library(progress)
pb <- progress_bar$new(total = 100, )
for (j in 1:100){
  pb$tick()
  Sys.sleep(1/100)
}

Code

cli::cli_progress_bar('Title', 
                      total = 100, 
                      clear = FALSE, )
for (j in 1:100){
  cli::cli_progress_update()
  Sys.sleep(1/100)
}
cli::cli_progress_done()