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523696410新蟲 (小有名氣)
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[求助]
求大神給看看CFTOOL工具箱非線性參數(shù)擬合的
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用cftool做一個非線性參數(shù)擬合,文獻(xiàn)里別人是能擬合出來的,自己測的數(shù)據(jù)就不行。能擬合嗎?不能的話是什么原因?謝謝謝謝~~~ y=a*x+b*x^3+c*x^5-d*((25-x^2)^0.5)^e x y -5.41469772292328 -41.0771840257921 -5.37527367418659 -41.6085599108019 -5.27575603632283 -41.7903721971788 -5.08979129085344 -41.0432217760363 -4.84231268933070 -40.3875325365343 -4.55045947751057 -39.3473408861437 -4.17570400463444 -37.8319752855577 -3.74086949454647 -36.1475575609484 -3.27192529516321 -34.2061513109484 -2.76776546092731 -31.7461331529894 -2.24238602390540 -29.4412282152452 -1.71912243535769 -26.6260312242784 -1.18455200867754 -23.2879594011583 -0.667190676946461 -20.2521794481554 -0.183493745904684 -16.7030881090441 0.335378074627101 -13.2451031847277 0.827087290193617 -9.68722469046496 0.952728526275337 -8.79446250632189 1.38250770101297 -4.77714187338732 1.80735086610514 -0.978717271832452 2.19643415471512 2.62844031617261 2.56835491450477 6.38414161965467 2.93801139628488 10.0847508268080 3.21372944449979 14.1172673063002 3.47805916385698 17.4848276929579 3.71788054758656 20.2295500592909 3.90560025403249 23.4783617810927 4.08857312573093 26.6067225293837 4.25809711737531 29.1711184339247 4.38795840887326 31.6053339795790 4.48447253143388 33.9177767591200 4.56703136729050 35.7757746534071 4.63621117228615 37.4577662305556 4.68661318587112 38.8699480848036 4.69155792666572 39.6965166883192 4.69787636825788 40.4436365918837 |
新蟲 (小有名氣)
金蟲 (初入文壇)

新蟲 (小有名氣)
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