Chart Maker help please

[Sirous_Nekooei]

Hi there,
I'm trying to make my charts in webviewer instead of canvas.
Starting to learn, I came to chart maker extension.
When I build a list like this, it works:

But when I try to make the list out of data, my block doesn't work:

I get this message:
Bad arguments to append to list
The operation append to list cannot accept the arguments: , [.......

[TIMAI2]

See here:

ChartMaker extension

Hi, I trying to do a simple graph using the Chartmaker extension, but something is wrong as I get the following message: [image] I get some data (temperature and humidity) from a DHT11 through a BLE: It is sent with a ";" separator that allow me to split it in two (first I remove the [ and ]). I manage to display the values in some label zone (label7 and label8) and event do some mathematics in it. For now I m just looking to X-plot the 2 values (yes it is stupid ... -> the plan i…

[Sirous_Nekooei]

Already read that tread, but I couldn't find my answer. By the way I'll ask there.

[TIMAI2]

@Sirous_Nekooei

but I couldn't find my answer

ChartMaker extension

This is how you need to present your data to the Chartmaker: [blocks (22)] [temp1] and for several values: [blocks (23)] [temp2] and to chart your two single values: [image]

[TIMAI2]

@Sirous_Nekooei

I'll ask there

I have deleted that duplicate post...

[Sirous_Nekooei]

I think I'm not clever enough to figure out how to implement those examples to my case.
Suppose that I want to graph numbers 5 to 100 in x axis and X*2 in y axis. As I tried in this block:

Whats wrong with creating the list?
The list is not created as expected and I get error message while creating the list (not yet drawing the chart )
Could you pls write down the block to make the list that is suitable to use in chart maker?

[TIMAI2]

These blocks will return a chart:

global n = [ [5,10],[6,12],[7,14],......,[100,200] ]

[Sirous_Nekooei]

Thanks so much
My mistake was that I had initialized the list by an empty text (" ")