polynomial expression precision

ecomfe / echarts-stat

Statistics tool for Apache ECharts

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Open feidudu1 opened 3 years ago

feidudu1 commented 3 years ago

echarts-stat/src/regression.js

if (i > 1) {
    string += Math.round(coeArray[i] * Math.pow(10, i + 1)) / Math.pow(10, i + 1) + 'x^' + i + ' + ';
}

this result in dispaly as 0x^2 + -0.01x + 36.58， the expected expression is -0.0005x^2 + -0.01x + 36.58 graph used echarts-stat graph used excel