SVG graph with variable width - graph

Question

I am trying to create an SVG graph with a fixed width to the left for the x axis labels and then a variable width to fill the remaining space for the actual graph results. The image below shows what I am trying to achieve. Thus far I have been unable to work out how to create the fixed width and variable width area.
Any help with this would be much appreciated!
Many thanks.

Answer 1

I would nest a couple of SVG elements inside your main like so:
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="500px" height="500px" >
<svg width="100">
<rect x="0" y="0" width="100%" height="100%" fill="red" />
</svg>
<svg x="100" >
<rect x="0" y="0" width="100%" height="100%" fill="blue" opacity="0.5"/>
</svg>
</svg>
NOTE I made the blue SVG element translucent so you can see that none of the red SVG was behind it.
I would also recommend using viewBox to give you more control over your drawing...
EDIT:
OK then I need to ask you a question about aspect ratios. If you take a square (width = height) and chop off a fixed portion from ONE side you no longer have a square and you have to think about what that means to your graph.
I believe this SVG will demonstrate more or less what you want:
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
width="600px" height="500px" viewBox="0 0 1200 1000">
<svg width="200">
<rect x="0" y="0" width="100%" height="100%" fill="red" opacity="0.5"/>
</svg>
<svg x="200" width="1000" height="1000" viewBox="0 0 100 100">
<rect x="0" y="0" width="100%" height="100%" fill="blue" opacity="0.5"/>
<rect x="80%" y="10%" width="10%" height="50%" fill="green"/>
<rect x="10" y="10" width="70" height="40" fill="gray"/>
</svg>
NOTE the aspect ratio (AR) of the outermost SVG's dimensions MUST match the outermost viewBox's AR but can have different values. Likewise for the second inner SVG, but now you are dealing with a slice of the total that is a true square and not a rectangle. You can vary the width and height of the outer most SVG and so long as you maintain the same AR all the code on the inside will not have to change - it will all scale automajically :)
Also note the different scales in use and the different value types I used for co-ordinates. Because my second inner SVG's viewBox set the user co-ordinates to 100 X 100, 10% and 10 amount to the same thing...
You could also set the preserveAspectRatio="none" or some other value to achieve different effects but for a graph I kinda think lining things up is important so I wouldn't.
One final note - you could (and in your case should) omit the viewBox on the inner SVG. That way the scale is consistent on all parts of your graph. I was just showing off the power of viewBox :)
It just occurred to me that you may prefer a rectangle to a square so here is a code sample for that:
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
width="800px" height="400px" viewBox="0 0 1600 800" >
<svg width="200">
<rect x="0" y="0" width="100%" height="100%" fill="red" opacity="0.5"/>
</svg>
<svg x="200" width="1400" height="800" viewBox="0 0 175 100" >
<rect x="0" y="0" width="100%" height="100%" fill="blue" opacity="0.5"/>
<rect x="80%" y="10%" width="10%" height="50%" fill="green"/>
<rect x="10" y="10" width="70" height="40" fill="gray"/>
</svg>
NOTE the width of the inner SVG is set to 175 so that the aspect ratio of 1400/800 is maintained.