39 lines
1.4 KiB
Markdown
39 lines
1.4 KiB
Markdown
# plot Bar Graph
|
|
|
|
Display a bar graph for a number value.
|
|
|
|
```sig
|
|
led.plotBarGraph(2, 20);
|
|
```
|
|
|
|
A bar graph is a kind of chart that shows numbers as lines with different lengths.
|
|
|
|
## Parameters
|
|
|
|
* **value**: a [number](/types/number) that is the value of what you
|
|
are measuring or trying to show. For example, if you are measuring
|
|
the temperature of ice with the @boardname@, ``value`` might be `0`
|
|
if the temperature is 0 degrees Celsius.
|
|
* **high**: a [number](/types/number) that is the highest
|
|
possible number (maximum) that the **value** parameter can be. The lines in the bar graph will reach their highest point when **value** reaches this number. If **high** is `0`, then the largest value recently plotted is used as the maximum.
|
|
|
|
## Example: chart acceleration
|
|
|
|
Show a bar graph of the [acceleration](/reference/input/acceleration)
|
|
in the `x` direction of the @boardname@.
|
|
The @boardname@'s `x` direction is from left to right (or right to left).
|
|
The faster you move the @boardname@ in this direction,
|
|
the taller the lines in the bar graph will be. The **high** paramter is `1023` which sets the highest possible value of acceleration to show.
|
|
|
|
```blocks
|
|
basic.forever(() => {
|
|
let a = input.acceleration(Dimension.X);
|
|
led.plotBarGraph(a, 1023)
|
|
})
|
|
```
|
|
|
|
## See also
|
|
|
|
[brightness](/reference/led/brightness), [fade in](/reference/led/fade-in), [fade out](/reference/led/fade-out), [LED screen](/device/screen), [stop animation](/reference/led/stop-animation)
|
|
|