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Posted to commits@echarts.apache.org by "helgasoft (via GitHub)" <gi...@apache.org> on 2023/02/07 22:56:27 UTC

[GitHub] [echarts] helgasoft commented on issue #18249: [Feature] Get the fitted/calculated y value by any x value on Smooth Line Chart

helgasoft commented on issue #18249:
URL: https://github.com/apache/echarts/issues/18249#issuecomment-1421582890

   I presume you want to get y=f(x) by some mouse interaction, not in general.
   Your code uses tooltip, but tooltip will only give you coordinates of **data points** on the line.
   For coordinates on the **smooth segments** between points, use _click_ with _zRender_ - [Demo Code](https://echarts.apache.org/examples/en/editor.html?c=line-simple&code=PYBwLglsB2AEC8tSRg2BvAsAKFrSYANgKYBcGYxAHmOQOQDGhEDA1rAIbQCeA7gBbEATsSRwGXAG4cAznQC-AGhx4qAQSoQZ5dEpWxuGrTr25YM4RGLbYAbX14sZvHgD0rgCYcwHcrYCMAAyKsABMoSGhAByRAMwh_gCcALrKzi5ePn4BikGpdhHh-bbx0cUALIqhscUArLkpqQ4uYNwgZLB0zNDEdGkuLjIAtsDAYPzkYEIArsTN8vpNZmCjhJAgOjgAkFtTEADm-8L0HJpyaTsAZsBCQ96UQuQAROgM8k8XWziuAFRXN3cwA9yJdptAGCg4AAKEAcIQcIYyEKQNjEMAASgw2x27lgHmIACNpodhABuWDYrawBgwGTAEgAOkIwH2ULoK3p6wZ11u92EfVgsPhiORLFYaPRpMp0iEeO8HDQQoRMlsgWSDMyHCl2B2Wxl-AgQ1EiE1tk1TOI0H241gAFpYP5ktrdRBLjC4cqLVabQA-B2Ypy6vVwgwANQ4hFmMkVHsRDLuIChsAgYAQfroAB4CT66LAANTJsAMixCKwyAByCNEBczrmz9HzhYZ0kjxFsKYZlpp-IZ3FVyWSsHRDIAVsAINA2VmhK4c-jKVsRGBpkI4JAjY3MwSZznG9xw62ZM6dvJYMRCBYsTrdUuV2vDdXOk-C0rEf3mxHZrZXyq1Z3wcAPZ9mqTqUgs15KLAPyuNsp44PI2o4PqABesqIEM3AAML8HCRZHGAABaQhQpKOCoQyMBskwYoCqC4KQrA7rCjIAb6CAwDRog36xjInaSJaRaoQAGiEP58QJDKoQAmqByxDCAa
 AYdhuEMjS0D8UIYAAGJCMAQwAAoQFQ55QugsD7KWHgAJLQPiVDkIEsCQexLHaqoMZCBYWnMt4UJgPJ74rFpRnEB4UL-Oi85mNwHleT5YB-QFjoMkFIVhRFUV4EpOGacWaIAPLgFAk5OAMeAECQOiUDQ9BUIgdAFlQeYCtw8ANdwcFmPIpHYN1pJAA)
   To find out when _mousemove_ is crossing a smooth line, take a look at code in [this answer](https://github.com/apache/echarts/issues/2941#issuecomment-1355854785).


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