About draw chart line

MIT App Inventor Help
1

Hello everyone, now i got a problem with chartdraw line. My data is save with array (list) type. Example: List voltage [0, 10, 20, 30] and list current [10, 20, 30, 40]. I use chartmakerplus to draw linechart, but i don't know to get 1 pair of corresponding values ​​to draw a graph. Who can help me?

2

Hello,

you can try something like this:

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3

Thanks you so much for your help, i will try it <3

4

I can only show the end point and can't draw a line graph can you help me?

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5

You only provide the chart with a single record, that is why you only get one point. You need to add the latest clock time to a list, not set the latest clock time to the variable. You also need to add your dataChanged values to a list.

2 Likes
6

yes that is something i have not done yet i need your help can you draw a sample for me

7

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You may also need to combine your lists to make a valid array for the chart.

1 Like
8

Something like this:

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I have the time format set to mm,ss you might want HH,mm ...

1 Like
9

Thank you very much, i did it thanks to your example but now i want to add another line to this chart, so can i create a list like that and how to add to LineChart

10

Just add another set of values, and add another header too...

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1 Like
11

oh nice, thank you very much