Hi Vincent,

Your script was okay. Charter was just buggy. 
-=-=-=-=-=-=-=-=-=-=-=-=
| b values |
b := RTCharterBuilder new.
values := { 5 . 6 . 7 .-1 . -3}.
b extent: 400 @ 300.
b interaction popup.
b points: values.
b connectDotColor: Color red.
b allY: #yourself.
b stackX.
b axisXWithNumberOfTicks: values size.
b axisYWithNumberOfTicks: 6.
b build.
b view
-=-=-=-=-=-=-=-=-=-=-=-=

Here is a slightly different version of your script (the definition of the interaction is __before__ adding the points).

Another example


Currently, x values _cannot_ be negative. It is not complicated to do (if you need this, and if you have time, then go ahead :-), but I need a bit more time. 

Let me this if this version solves your immediate problems. And please, shout if something does not work for you (as you did :-)

Cheers,
Alexandre

-- 
_,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:
Alexandre Bergel  http://www.bergel.eu
^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

On Aug 8, 2014, at 8:32 AM, Blondeau Vincent <vincent.blondeau@worldline.com> wrote:

Hi,
 
I currently use Charter which is doing nice charts for me. But I experienced some kind of bug with the scales of the chart especially if the values are negatives.
See by yourself:
<image001.jpg>
Here the code to draw it:
| b |
b := RTCharterBuilder new.
b extent: 400 @ 300.
b points: { 5 . 6 . 7 .-1 . -3}.
b connectDotColor: Color red.
b interaction popup.
b allY: #yourself.
b stackX.
b axisXWithNumberOfTicks: 4.
b axisYWithNumberOfTicks: 6.
b open.
b view canvas.
 
Did I make something wrong?
 
Thanks in advance !
 
Cheers,
 
Vincent


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