The only way to make this happen is to manually set your chart options to
match your data. The simplest example is with a square grid. To make the
grid square, given the height and width for the chart, you would need to
set the chartArea.height and chartArea.width options to create a square.
This can be done by either assigning numbers (pixel dimensions) or by
assigning percent strings (percent of total chart height/width, as
appropriate). As an example:
var dimension = parseInt(chartHeight * 0.8); // set dimensions of the
square to be 80% of the chart's height
in chart options:
chartArea: {
height: dimension,
width: dimension
}
You would then need to set the hAxis.viewWindow.min/max and
vAxis.viewWindow.min/max options to make sure that both axes are showing
the same range of values; they don't have to show the exact same values,
just the same range (eg, x-axis max - min = y-axis max - min) so the scale
remains the same, eg:
hAxis: {
viewWindow: {
min: 0,
max: 500
}
},
vAxis: {
viewWindow: {
min: 1000,
max: 1500
}
}
This can be extended to allow for non-square grids as well, you just need
to keep the axis proportions the same as the chartArea proportions.
On Wednesday, June 18, 2014 10:07:43 AM UTC-4, Alban Hertroys wrote:
>
> We have a case for a chart where both the X-axis and the Y-axis are
> dimensions in mm. The graph describes a measured contour.
>
> It would be helpful to our users if both axis would scale uniformly,
> meaning that any distance measured on one axis should be the same on the
> other axis. Grid lines would be equally spaced on both axis, etc.
> For example, if the distance between major grid lines on the Y-axis is
> 50mm, then it should also be 50mm on the X-axis. The grid should be a grid
> of squares of 50x50 mm, not rectangles of 50x50 mm (or any other ratio).
>
> Is this possible, and if so, how to achieve this?
>
> Note: I would prefer if the graph in its entirety would still
> automatically scale to the amount of space available.
>
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