pxt-calliope/docs/projects/plot-acceleration.md

Plot Acceleration

The ||led:plot bar graph|| uses the screen to display the magnitude (how big a number is whether it's positive or negative) of a value. This is a great tool to understand the data returned by sensors... like the accelerometer.

Acceleration

This example plots acceleration in the x dimension on the LEDs.

basic.forever(() => {
    led.plotBarGraph(
        input.acceleration(Dimension.X),
        0
    )
})

Console

Click on the ||Show Console|| button to see a chart of the values plotted by the block over a period of time.

Maximum value

If you specify the maximum value, the block can do a better job at displaying the data. For example, we can tell the block that we don't expect values beyond 1000 mg.

basic.forever(() => {
    led.plotBarGraph(
        input.acceleration(Dimension.X),
        1000
    )
})

Other sensors

You can use this block for pretty much any kind of data. Try it out! Plot the light level as you play with the light sensor.

basic.forever(() => {
    led.plotBarGraph(
        input.lightLevel(),
        0
    )
})