Javascript 在Plotly.js中更改标记形状

我在plotly.js库中寻找一些关于更改标记形状的帮助

我要做的是将每组的第一个标记和最后一个标记更改为垂直线，将中间的标记更改为菱形

我已经详细地遵循了这个参考，但似乎无法使它发挥作用

这是我使用的JS

var subject = ["Title 1","Title 1","Title 1","Title 2","Title 2","Title 2"];
var score = [40,50,60,20,40,60];
var data = [{
    type: 'scatter',
    x: score,
    y: subject,
    mode: 'line',      
    transforms: [{
        type: 'groupby',
        groups: subject,
    }],  
    hoverinfo: 'text',
    text: ['Lower Index : 40','Est : 50','Higher Index : 60','Lower Index : 20','Est : 40','Higher Index : 60'],
    marker: {
        size: 12,
        shape: ['line-ew',"diamond-open","line-ew","line-ew","diamond-open","line-ew"]
    },
}];
var layout = {
    xaxis: {
        type: '-',
        title: "x Title",
        range:[0,100]
    },
    yaxis: {
        title: "Y title",
    },
    title: "Main Title",
    showlegend: false,
    legend: {"orientation": "h"}
    };
Plotly.plot('myGraph', data,layout)

和同一个例子的代码笔

---

在逐行检查之后，我发现了问题所在

marker: {
    size: 12,
    shape: ['line-ew',"diamond-open","line-ew","line-ew","diamond-open","line-ew"]
},

应该是

marker: {
    size: 12,
    symbol: ['line-ew',"diamond-open","line-ew","line-ew","diamond-open","line-ew"]
},