Question

<script type="text/javascript">
    var divElem = d3.select("#svgpathSVGdata");

data for squares

var jsonsquare = [{
    x: 40,
    y: 170,
    width: 120,
    height: 120,
    label: "technology"
    },

    ];

setting the canvas with of course width & height declared already

var svgcanvas = divElem.append("svg:svg")
               .attr("width", w).attr("height", h);

This is the relevant coding… for some reason it doesn’t generate a square

var square = svgcanvas.selectAll("rect").data(jsonsquare);

circle.enter().append('svg:rect').append("svg:g")
.attr('opacity', 0)
.attr("cursor", "pointer");
}).attr("x", function(d) {
    return d.x;
}).attr("y", function(d) {
    return d.y;
}).attr("width", function(d) {
    return d.width;
}).attr("height", function(d) {
    return d.height;
});

linking label to the squares

svgcanvas.selectAll("text").data(jsonsquare).enter().append("svg:text").text(function(d) {
    return d.label;
}).attr("x", function(d) {
    return d.x + 10;
}).attr("y", function(d) {
    return d.y + 10;
});





</script>​​​​​

Answer 1

You’re assigning the rectangle’s attributes to the group (i.e, svg:g) beneath it. In the line below, remove the .append("svg:g") and it should work.

square.enter().append('svg:rect').append("svg:g")

Also, you’re setting opacity to zero:

.attr('opacity', 0)

This makes your rectangle invisible. Set it to 1 instead for full visibility, or some number in between for a translucent fill effect.