Charter axes scale

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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Blondeau Vincent wrote

I experienced some kind of bug with the scales of the chart...

Maybe related? The following script starts the first x value way off to the
right, even though I thought #stackX just uses 1, 2, 3...
============
data := { { Date yesterday. '3' }. { Date today. '30' } }.

"Charting the data"
b := RTCharterBuilder new.
b extent: 500 @ 400.
b interaction popupText: [ :row | row date julianDayNumber ].
b points: data.
b connectDotColor: Color green.
b allY: [ :r | r second asNumber ].
b allX: [ :d | d first julianDayNumber ].
b stackX.
b axisY.
b build.
b view.
============
3 tested scenarios:
- #stackX and then #axisX - the two x values span from about 3.0 - 4.0, with
the axis labeled only from 0.0 to 2.0.
- #axisX and then #stackX - the labels are up to the first date point x
value, but the point itself is still shifted more to the right
- only #stackX - no labels, but first point shifted way to right from origin

Then as a sanity check, I manually put -43000 into the first x data point,
with only #stackX and it still showed the first point to the right of the
origin.



-----
Cheers,
Sean
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