D3 transform scale and translate

Question

I tried to understand how the transform is working in D3 but I think I didn t get it   Does the scale change the size of the SVG object   meaning if I give a big number the size of the object will look bigger   Does the translate move the object from one place to different place   I tried it but it didn t work like I thought   Could you please explain to me how it should work

User · Answer

Scott Murray wrote a great explanation of this^[1]. For instance, for the code snippet:

svg.append("g")
    .attr("class", "axis")
    .attr("transform", "translate(0," + h + ")")
    .call(xAxis);

He explains using the following:

Note that we use attr() to apply transform as an attribute of g. SVG transforms are quite powerful, and can accept several different kinds of transform definitions, including scales and rotations. But we are keeping it simple here with only a translation transform, which simply pushes the whole g group over and down by some amount.

Translation transforms are specified with the easy syntax of translate(x,y), where x and y are, obviously, the number of horizontal and vertical pixels by which to translate the element.

[1]: From Chapter 8, "Cleaning it up" of Interactive Data Visualization for the Web, which used to be freely available and is now behind a paywall.

User · Answer

I realize this question is fairly old  but wanted to share a quick demo of group transforms  paths shapes  and relative positioning  for anyone else who found their way here looking for more info   http   bl ocks org dustinlarimer 6050773

User · Answer

The transforms are SVG transforms  for details  have a look at the standard  here are some examples   Basically  scale and translate apply the respective transformations to the coordinate system  which should work as expected in most cases  You can apply more than one transform however  e g  first scale and then translate  and then the result might not be what you expect   When working with the transforms  keep in mind that they transform the coordinate system  In principle  what you say is true -- if you apply a scale   1 to an object  it will look bigger and a translate will move it to a different position relative to the other objects

[svg] D3 transform scale and translate

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