d3 : path의 d, d3의 function d

https://stackoverflow.com/questions/53351036/what-is-the-meaning-of-attrd-path/53351173#53351173  :  내가 질문한것

svg Path 에 대한 설명

https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/d#Path_commands

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https://stackoverflow.com/questions/35892627/d3-map-d-attribute

The "d" attribute in a path object defines the successive coordinates of the points through which the path has to go (it also gives indication about whether the path should use bezier curves, straight lines, etc.). See some documentation here.

Be careful: in d3, d is often used as a parameter for anonymous functions representing the data currently binded to the current element. So the two are completely different things.

Here, your line

.attr("d", path)

should probably look more like

.attr("d", function(d){return d.path})

i.e., take the field path within the data elements.

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https://www.dashingd3js.com/svg-paths-and-d3js

내가 느낀 바 path 에서의 d는 

일종의 그림을 그리는 좌표 같은 것 같다....

1<svg width="100" height="100">
2  <path d=" M 10 25
3            L 10 75
4            L 60 75
5            L 10 25"
6            stroke="red" stroke-width="2" fill="none" />
7</svg>

부를때는,,,,

보통 d attr 다시 말해 d attribute라고 말한다..

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d3의 function d는 데이터를 말하는 듯 싶다.. 위에 설정