maciej-flexcompute commented on issue #18437: URL: https://github.com/apache/echarts/issues/18437#issuecomment-1528963027
Sorry, I didn't know that the problem was not sufficiently described. Sorry for the confusion. Sure, here are examples: **xaxis** ``x = [0.01, 0.50, 1.01, 1.50, 2.01, 2.51, 3.01, 3.50, 4.01, 4.50, 5.00, 5.51, 6.01, 6.50, 7.01, 7.51, 8.00, 8.50, 9.01, 9.50, 10.01, 10.51, 11.00, 11.51, 12.01, 12.51, 13.01, 13.50, 14.00, 14.20, 14.41, 14.60, 14.80, 15.01, 15.20, 15.41, 15.60, 15.80, 16.01, 16.21, 16.40, 16.60, 16.80, 17.00, 17.20, 17.41, 17.61, 17.81, 18.01, 18.20, 18.41, 18.60, 18.81, 19.00, 19.21, 19.40, 19.60, 19.81]`` **series 1 (y1)** ``y1 = [1.00, 1.03, 1.05, 1.08, 1.10, 1.13, 1.15, 1.17, 1.20, 1.22, 1.25, 1.27, 1.30, 1.32, 1.34, 1.37, 1.39, 1.41, 1.44, 1.46, 1.48, 1.50, 1.52, 1.54, 1.57, 1.59, 1.61, 1.62, 1.64, 1.65, 1.66, 1.67, 1.67, 1.68, 1.69, 1.70, 1.70, 1.71, 1.72, 1.72, 1.73, 1.74, 1.74, 1.75, 1.76, 1.76, 1.77, 1.78, 1.78, 1.79, 1.80, 1.80, 1.81, 1.81, 1.82, 1.82, 1.83, 1.84]`` **series 1 (y1)** ``y2 = [0.01, 0.71, 1.00, 0.70, -0.01, -0.72, -1.00, -0.71, 0.01, 0.71, 1.00, 0.70, -0.02, -0.71, -1.00, -0.70, 0.01, 0.71, 1.00, 0.70, -0.01, -0.71, -1.00, -0.70, 0.02, 0.72, 1.00, 0.71, -0.00, -0.31, -0.60, -0.81, -0.95, -1.00, -0.95, -0.80, -0.58, -0.31, 0.01, 0.32, 0.59, 0.81, 0.95, 1.00, 0.95, 0.80, 0.58, 0.30, -0.01, -0.31, -0.59, -0.81, -0.95, -1.00, -0.95, -0.81, -0.59, -0.30]`` Plotted as category line:  [Category Line Demo](https://echarts.apache.org/examples/en/editor.html?c=line-stack&code=PYBwLglsB2AEC8sDeAoWtJgDYFMBcya6GOAHmAQOQDCAhmDgObABOAnpUQL4A0RYwYFkggCqYhhYRGjHCyq1SEAM6d0vIrlnQAJmKLod9WgQDalNgEZKPWBYBMlALrc-6RlL2EJuAGYU7AGYAUhsDWClGAAsAygAWULdiACNgMAEAWyoQsIkAYxgwWghoABlaZJwsAjAWAFccV35BLFTSfQlfHHo6lnxvCVhlWgA3HABBZQBJDNpZMS5wxfUk0nGlZQ7iMDYQfso8-iZWDiT0VLrdWnYAcVpRWF9aLGUcM9gjIrMABgA6b8stj-AFZvrZLP9AbAIaDbPZIXDfsCoYEEbBUbDYHE0djMcD_mDYPjkbYAGxo8mYgDsaJpJNgAA4CbYmZiAJxojmYyx_AHgkFQywQ76EoVIwXwvnQ-H0yyoqVypGi7Ei8HY-zK35xQXY0mahmi_EK_Ea8H47Vm356y0G8HkhXk-yC8lxUXk63Q8m26E01U-36m_0W_2kwU0hmCpkKpmByxM4Nxq2ipkR8Ecv2WDlOtNa0Ucj2Z34RlwrIhsdYqLboHZ7KgjZ4NNSwDToV5SHCbWCmcLiQbQWgZfZWXKDGv7LAlHAjiQAehnQyKeQA1lQACppZ7T4hz2DXboAZR2uAW73QO-Ui6Xh5YR0YbAUWCwW8MxjMwtF_0C4P-wO_3wZ348oBX7Qr8li_qBlhUt-sYBvYMEQRC9jQaBgQfoE8GoXE36BChEKBGy34Jlq2GgXEpJEQBoHckimEwqRMJ4UihGgaG36knRVoMVaiFWhRrFMaSglURCpIsRCVIfpJ35UoKvxUpxCkySBEncVSam8VS_ESdp8lMVSInyYZVLiUWH7ehCqagVZlmcQydkqUWcQlsQLbEL2Ej9oOVBsI4p4 YLs46Ts-sDnpea4bk-_k7nutCHmwx7IG5s7zhetDLtet73nYzxReEL5fF2vJQn8sl_oSpWEgAtMVtg1fJmFVe-dWlSVaKteVQLydVvKNR1sBNcyA2VV1Ur9c1sAjcNaL1WVA0TbNFX_JhpWcX6_X1X69WBFC9UevVVn1WyEGDVtfzHS1ZmXcCVHbW1Y2_BhXXAixfxWedvHrb8F2TVdv03V1aGXVKd3XSxB27R9dULVD02HSC4N_GhLmlugLhcAA3EAA) Plotted as category stack:  [Category Stack Demo](https://echarts.apache.org/examples/en/editor.html?c=line-stack&code=PYBwLglsB2AEC8sDeAoWtJgDYFMBcya6GOAHmAQOQDCAhmDgObABOAnrAMpi0DGA1pSIBfADREwwYFkggCqYhhYRGjHCyq1SEAM5D0YorjXQAJvKLpT9WgQDalNgEZKo2I4BMlALojx6RmVzQkVcADMKdwBmAFJXS1hlRgALSMoAFjj_YgAjYDBJAFsqWPjFXhgeCGgAGVocnCwCMBYAVxw_CSksPNILRTCcelaWfBDFWB1aADccAEEdAElC2jV5YQSNg2zSOe0dfuIwNhAxyl56JlY2MtzgVrNadgBxWjlYMNosHRxsqxt7AAGAB0gKcbhBAFZAW4nKDwbA4dC3B54SjgZCEVE0bBscjYOkcYT8ZDQTDYKTMW4AGw42n4gDsOKZVNgAA4yW4OfiAJw4vn4pwgsGwqEIpxwwHkiUY8WokWI1GspzYhUqjHSwlS2GEjya4HpcWE6n6tnS0lq0l62Gkw024Em-1m2G0tW0jzi2npaW0x2I2nOxFM7VB4HW0N20PU8VMtnijlqjnhpwcyMph3Sjlx2F8kNOPkenMG6V8v354Fx3zbIhsPa6Q7oY6nKjTL7tfSwQzoH7KHAHWB2BIKCbQWiFM7OW6KJtnLDVHBT4g6HgCKgAFXyX0X6CeQ24bFw6z-S5X_G4LEujDYmiwWG3sGsPHskuloKisNBkI_gLZH6Ff_fRFgScL8gKcBkP2TMMPEg0C4Q8CCgKiV8ohgpD0g_KJELhKIeQ_NMDQwoD0mpfDfyAwUMTQpEiKRbCMTwoDow_alqIdWiHTgh1SKY-jqT48i4WpRi4QZV8xI_BlxWBBk2NkyTANEjiGWUriGR40SNJk-iGUEmS9IZESK1fQM4WzIDzLMti2WsxSK3SKtiC7Yhh0UUdxyoNgvGPRsTl ned72XPh-HXTc7x82Bd1ofdD2QZzFCCgRz0va93C-cKEn-J8B2FBEQSk79yXy8kAFpcrcMqZLQkqXwq_K8pxerCohGTSuFaqmtgGrOS64qWoVTratgPrepxSqCq6obxqK0E0PytiQ06yqQ0qqIEUqv1KvMyqeVA7qVpBXa6uM47IXI1aGoG4FUJayFGJBczDq4xbgSO4aTves6WuQ46FQu07GK29anoqqaQdG7aoUBkFkMc6t0F8YQAG4gA) Plotted as value line:  [Value Line Demo](https://echarts.apache.org/examples/en/editor.html?c=line-stack&code=PYBwLglsB2AEC8sDeAoWtJgDYFMBcya6GOAHmAQOQBqAhlgK46VEC-ANEWMMFpCAVTEMAJwgBzcThFVapCAGcW6DkVxToAE0FF0m2mFoEA2pQCeARkrtY5gEyUAum07pxY7YWG4AZhVsAzACk1rqwYuIAFv6UACwhrsQARsBg3AC2VMGhwgDGMIYQ0AAytEk4WARgIkwuXDxYKaQ6wj44Bgwi-F7CsAq0AG44AIIKAJLptFKCrGGzKomkw_IKLcRgZiDdlAP0TDnJwAxatCJmAOK0ArA-9Ao4iegA9E-w-oYmAAwAdJ8WNj8AKyfGwWX7_WBg4E2OzgmHfQEQgJw2DI6GwWIozHowG_EGwXGImwANhRpPRAHYUVSibAABx4mwM9EAThRbPRFh-f1BQIhFjBn3xAoR_NhPMhsNpFmREplCOFmKFoMxdkV31i_MxxPVdOFuLluLVoNxmpN3x15r1oNJctJdn5pNiwtJlshpOtkKpyq932NvrNvuJ_KpdP5DLlDP9FgZgZjFuFDLDoLZPosbIdKY1wrZbvT3zDzgWRDMy0Ua3QGy2VF2jGYdXQ9zEOFWsGMYSEvWgtHS20sB2EVe2WCKzEexAU6R4YEiVRqDzCz1eCkMuQA1lQACqpegD4gvWCndoAZQ2uBm46XfVXa9PIgMOHEZlkWCwe70BiMbeM3P5eMcNg_gqoK_AEAFtoKf6fIC4HGFCwq_HSsHin-XLIaKIEyrBsqoTBgFoghFgUrBSp_mqJHAZCfp2LBBoIXYeFtoSZHEYBtp_gEnyweSCEBDRgHehxsSwTSHGsW2Ea8SysHMghmqwamf6xMJgEcnJxKwVyKJgrESGAVp0oKppgoIYC_EQVCf6AipEEoSBgLiXBUpWdJ-k4SBwaaQRHnmXBSoIcS Nl-X6AWMcFcYWhp-nagFjkWJinpgsScUGn-xJ6RBRoBa5mUan-FJcfpuJ5t8BWabiiWlRYmnsSBFK-RY9r5Q1ToIRSYH6a6bVBY1BbdZp3ptWFREhXVUUQVSEUUuNcFUsGdVxaG-UZXBEbLZpUZtTlq15SBeobQme2FRBSZ_oW-mpgh50QRmZ0NWyzp7fdh1UXSHU3QWZ3CUWxCqMInbCN2vZUGYDiXhgmzDqO759FOqSzqITDgweK60OuW47m-yOvEetCnmY57IH9vQozed4Pk-L5Y4ubyfiYQESr-sFAviPwUtV-naf-nPomzx3GHZsAALRM4Bzk2CLpW-e5wsmdhlGS-zFGM-CFG81VtGMlRQqa7SfPcSikufL5PES2zHNtoJEtywJGHC_rgGSQCquO5R5sKVzOuqW7pX81pEpGxbcF8mbGv6SZ1vcxZduK37gvcg14uwGzDUyzbEHecnYcQf5odezno3298ARB_Fu1FzqmkxaH13BZ6ksssNqWR_ncFZaHjfleXkv7UVL2S4CK0WBV-KSyXNUoqLEFNc7fET49WeAttvVuj8te9Z6Pyd_pg0ga3I3-lvw2TRCa9-3Np8IkPS2z37a156Xm2h-P-mxhCA_Lwybo94_n0d8Nl0W5-1uv_TSD1R5r1LrmCBCJl5smTEXTijgfoqCIM4VgABuIAA) **Problem** You can clearly see that two line plots appear visually different. In the category plots, it seems that y1 is not a linear function as has a kink arround x=14. The y2 line has larger period in x in [14, 20] and shorter period in x in [0, 14]. In the value plot you can see that y1 is actually a linear function (the small off-linearity is due to roundoff error), and y2 is regular periodic function without any changes in periods. This data plotted as 'category' creates confusion to the receiver, because datapoint lay in mathematically incorrect locations. User can incorrectly conclude that y1 is non-linear and y2 is not regularly periodic. In general any (x, y) data represented by real numbers should always be presented as 'values' and never as 'categories'. See plotting in Matlab, python, gnuplot, excel or any other plotting tools. The solution you proposed in the last plot, in my example I would need to put sampling in 0.01 period, which is 2000 points instead of 58 (dataset size). But in general case (interval are real numbers) this is not possible to find such interval. Finally, you can make a restriction that x values are common for both y1 and y2. I.e., there is not such x point of series 1 for which we don't have data from series 2 and vice versa. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@echarts.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@echarts.apache.org For additional commands, e-mail: commits-h...@echarts.apache.org
