Draw a sparkline bar graph with unicode block characters

Source: R/spark.R

Rendered using block elements. In most common fixed width fonts these are rendered wider than regular characters which means they are not suitable if you need precise alignment.

spark_bar(x)

Arguments

x

A numeric vector between 0 and 1

Details

You might want to avoid sparklines on non-UTF-8 systems, because they do not look good. You can use is_utf8_output() to test for support for them.

See also

spark_line()

Examples

x <- seq(0, 1, length = 6)
spark_bar(x)

#> [1] "▁▂▄▅▇█"
#> attr(,"class")
#> [1] "cli_spark_bar" "cli_spark"    
spark_bar(sample(x))

#> [1] "▂▇▅█▁▄"
#> attr(,"class")
#> [1] "cli_spark_bar" "cli_spark"    

spark_bar(seq(0, 1, length = 8))

#> [1] "▁▂▃▄▅▆▇█"
#> attr(,"class")
#> [1] "cli_spark_bar" "cli_spark"    

# NAs are left out
spark_bar(c(0, NA, 0.5, NA, 1))

#> [1] "▁ ▄ █"
#> attr(,"class")
#> [1] "cli_spark_bar" "cli_spark"