The log_close function closes the log file.
Details
The log_close function terminates logging. The function also prints
the log footer. The log footer contains a
date-time stamp of when the log was closed.
Examples
library(logr)
# Create temp file location
tmp <- file.path(tempdir(), "test.log")
# Open log
lf <- log_open(tmp)
# Send message to log
log_print("High Mileage Cars Subset")
#> High Mileage Cars Subset
# Perform operations
hmc <- subset(mtcars, mtcars$mpg > 20)
# Print data to log
log_print(hmc)
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Mazda RX4 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4
#> Mazda RX4 Wag 21.0 6 160.0 110 3.90 2.875 17.02 0 1 4 4
#> Datsun 710 22.8 4 108.0 93 3.85 2.320 18.61 1 1 4 1
#> Hornet 4 Drive 21.4 6 258.0 110 3.08 3.215 19.44 1 0 3 1
#> Merc 240D 24.4 4 146.7 62 3.69 3.190 20.00 1 0 4 2
#> Merc 230 22.8 4 140.8 95 3.92 3.150 22.90 1 0 4 2
#> Fiat 128 32.4 4 78.7 66 4.08 2.200 19.47 1 1 4 1
#> Honda Civic 30.4 4 75.7 52 4.93 1.615 18.52 1 1 4 2
#> Toyota Corolla 33.9 4 71.1 65 4.22 1.835 19.90 1 1 4 1
#> Toyota Corona 21.5 4 120.1 97 3.70 2.465 20.01 1 0 3 1
#> Fiat X1-9 27.3 4 79.0 66 4.08 1.935 18.90 1 1 4 1
#> Porsche 914-2 26.0 4 120.3 91 4.43 2.140 16.70 0 1 5 2
#> Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.90 1 1 5 2
#> Volvo 142E 21.4 4 121.0 109 4.11 2.780 18.60 1 1 4 2
# Close log
log_close()
# View results
writeLines(readLines(lf))
#> =========================================================================
#> Log Path: /tmp/RtmpI4bEze/log/test.log
#> Working Directory: /tmp/.tmpGy5KKX/docs/logr/1.4.1/src/docs/reference
#> User Name: runner
#> R Version: 4.6.2 (2026-10-29)
#> Machine: runnervm48cm3 x86_64
#> Operating System: Linux 7.0.0-1017-azure #17~24.04.1-Ubuntu SMP PREEMPT Thu Sep 24 18:46:57 UTC 2026
#> Base Packages: stats graphics grDevices utils datasets methods base
#> Other Packages: logr_1.4.1 common_1.1.5
#> Log Start Time: 2026-10-29 23:26:58.826801
#> =========================================================================
#>
#> High Mileage Cars Subset
#>
#> NOTE: Log Print Time: 2026-10-29 23:26:58.829578
#> NOTE: Elapsed Time: 0.00214171409606934 secs
#>
#> mpg cyl disp hp drat wt qsec vs am gear carb
#> Mazda RX4 21.0 6 160.0 110 3.90 2.620 16.46 0 1 4 4
#> Mazda RX4 Wag 21.0 6 160.0 110 3.90 2.875 17.02 0 1 4 4
#> Datsun 710 22.8 4 108.0 93 3.85 2.320 18.61 1 1 4 1
#> Hornet 4 Drive 21.4 6 258.0 110 3.08 3.215 19.44 1 0 3 1
#> Merc 240D 24.4 4 146.7 62 3.69 3.190 20.00 1 0 4 2
#> Merc 230 22.8 4 140.8 95 3.92 3.150 22.90 1 0 4 2
#> Fiat 128 32.4 4 78.7 66 4.08 2.200 19.47 1 1 4 1
#> Honda Civic 30.4 4 75.7 52 4.93 1.615 18.52 1 1 4 2
#> Toyota Corolla 33.9 4 71.1 65 4.22 1.835 19.90 1 1 4 1
#> Toyota Corona 21.5 4 120.1 97 3.70 2.465 20.01 1 0 3 1
#> Fiat X1-9 27.3 4 79.0 66 4.08 1.935 18.90 1 1 4 1
#> Porsche 914-2 26.0 4 120.3 91 4.43 2.140 16.70 0 1 5 2
#> Lotus Europa 30.4 4 95.1 113 3.77 1.513 16.90 1 1 5 2
#> Volvo 142E 21.4 4 121.0 109 4.11 2.780 18.60 1 1 4 2
#>
#> NOTE: Data frame has 14 rows and 11 columns.
#>
#> NOTE: Log Print Time: 2026-10-29 23:26:58.839582
#> NOTE: Elapsed Time: 0.0100038051605225 secs
#>
#> =========================================================================
#> Log End Time: 2026-10-29 23:26:58.840952
#> Log Elapsed Time: 0 00:00:00
#> =========================================================================