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Pretty thoroughly rewritten in simple language.

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Ron Hale-Evans 2016-05-23 16:21:08 -07:00
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docs/reference/led/plot-bar-graph.md
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# Plot Bar Graph
Displays a vertical bar graph based on the value and high value.
Displays a bar graph of the numbers you say.
A bar graph is a kind of chart that shows numbers as lines with different lengths.
```sig
led.plotBarGraph(2, 20);
@ -8,10 +9,18 @@ led.plotBarGraph(2, 20);
### Parameters
* value: [Number](/reference/types/number) , high : [Number](/reference/types/number) displays a vertical bar graph based on the value and high value
* `value` is a [Number](/reference/types/number) that means what you are measuring or trying to show. For example, if you are measuring the temperature of ice with the BBC micro:bit, `value` might be 0 because the temperature might be 0 degrees centigrade.
* `high` is a [Number](/reference/types/number) that means the highest possible number that the `value` parameter can be. This number is also the tallest that the lines in the bar chart can be.
### Example: chart acceleration
This program shows a bar graph of the [acceleration](/reference/input/acceleration)
in the `x` direction of the micro:bit.
The micro:bit's `x` direction is from left to right (or right to left).
The more you speed up moving the micro:bit in this direction,
the taller the lines in the bar graph will be,
until they are as tall as the parameter `high` says they can be.
```blocks
basic.forever(() => {
let a = input.acceleration(Dimension.X);