helgasoft commented on issue #20868:
URL: https://github.com/apache/echarts/issues/20868#issuecomment-2763024427

   @tuhinkarmakar3882, good of you to investigate this. I am unable to respond 
to all of your questions, but **negative values** has been a long-standing 
feature request #17459, #15558.
   Noticed @Antti-Palola did already work on a fix 
[PR#20872](https://github.com/apache/echarts/pull/20872). Hope it gets approved 
ASAP, why not even for incoming v.6.0.
   
   Got inspired to hack a workaround - 
[Demo](https://echarts.apache.org/examples/en/editor.html?helgasoft=log+negative-values&code=PTAEGUEMFsAcBsCmpoEsAeiAmouQC6QCwAUAMYD2AdgM76gUBOqA5qlZPACIGSgC8oANoBaAKwAGCQBpQIgExTZAZhmgAHErljZARkkBdANylKtemQKIWTVIhoDhAcgCCT2U4BC70E4DCPk5cgQCigQBiTsakIKCW8GQArvBWoACaInSQjPgAapyJiKQAZolUZPio1HHwFDT2-AAKFADuiIwA8sW6EgAUVInQAJSgAN6koKCoxaD9gwL8ghIjjIj4iYxUoLomJJNmdKCI6LDUiFT0ggCyBAAWAHTFtUy9N_gPtSw9r3f3kABGNDmwyGQ12k1W602oDeD1OLV6PVkx1OVHO-DBpAAvqR8JchMYGMw2BxuLx7tBILBeugBAA-UB4-6wRI0W69Mi1ep0ZptTrdProUGYkh0ABujlhFPYvXucrxQ2APV2MTA4AQqHo7HwFFApxomtQYuQkCoODRLAIRuQ9WY9lM1EO-sNxp4hEcthJnDdkApVN6vTFslQI34DIlDIkoAA_KAJQAuUADeDwEUHegWq2u3ge4nsb3kynUwPB0Ph0AAHlAUdjUoBQLFI0TydTKpIFFglWqgnGe0ZFAo8EqsETo1AWOkE1ALGYWETQinkzHsQAKh3p7PQMUmHq6i7kGKCva-5NJjqR74xABSdyL0-3RCsW74RNOAAs16cd4nd-XYE8FB4hQ0AbqgODbowSbWFmB5HjQd5nh2r6SDek4nvej4sM-r4fqhCH9oOw6jvhkwQZSeLtImvSwNkMA0GWYwkaekIbFsaBmgA1AABvk8CFImIgACSjDRjB0fch58YgWIVv8jB0sJlj4NYtj2EIoniXghAAJJmscBhYlx4KniZOLoZM
 
ZmmVOBhoZM6AuOgqA0POv6gKu672Y5Di9LcYFYOcQz4fgACesCIK-SkqYwwW3uZoFYLp_noImMj4VpkCJpFNh2jQtkmaAbKtImxScPU355Uubn_oBOogZ5TmzGKTmoP8SCBXFIVhRFVjZTFFWnjOYGJccia6P1kzpZlPWqbl-GQF5AAyAKIPAo4FbcRWMowhTjt-1l5cFDlOS56F_qAzQGpUxpxnBoDzQ1vTnu1-WMqF4W-J8sUvYNCV6cl1bjVMVDGow9TFaViCyFkOS8fxBX4EGc2Lctq1jKATFkQQymMFRjb0nG-GWaeP6nVVoAAHLQVdsFSQ493ef8NXAc9-Wde9TifYDP3Df9Y34ewINg1thRQ4QMNHom4qA_TS3_CtxFxaRTDkdjuMMU4IhOKAHEE3FRMWftU62nYznCK5sQXfuBXtCbQVva-_zZF9-X1TQPMpYDh1ee7ANpbwibOtTPqA5qiDQOAIVIGtlC1DjvgAMRviVWDKGIWv6-O_VnZTlrU9bOV211viO4wzsma7Pt83FXtOZXgOTVBufWsH_PKeHkfvWOMdMK-8dYFgb6D2-6f9UTNnYkYQA).
 It works for _scatter_ and _bar_ series, but not for _line_ (and log line 
crossing zero does not make much sense anyway).
   
![Image](https://github.com/user-attachments/assets/9a763944-1f5a-4986-888e-6c5eb7f53d68)


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