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金虫 (正式写手)

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在线: 148.4小时
虫号: 625005

[交流] Origin 7.5 非线性拟合公式错误请求高手修改

公式为
y=0.8658-31.648*{0.00625+x+1/k-[(0.00625+x+1/k)^2-0.025*x]^0.5}

k为参数，xy为自变量和因变量

// Dependent Variable(s):
double& y)
{
// Beginning of editable part
y=0.8658-31.648*{0.00625+x+1/k-[(0.00625+x+1/k)^2-0.025*x]^0.5};
// End of editable part
}

compiling...
_nlfuser3.fit
C:\Documents and Settings\Administrator\Application Data\OriginLab\Origin75E\User Files\OriginC\NLSF\_nlfuser3.fit(40) :Error, invalid numeric literal
C:\Documents and Settings\Administrator\Application Data\OriginLab\Origin75E\User Files\OriginC\NLSF\_nlfuser3.fit(40) :Error, Variable "{0.00625+x+1/k-[(0.00625+x+1/k)^2-0.025*x]^0.5" not declared
C:\Documents and Settings\Administrator\Application Data\OriginLab\Origin75E\User Files\OriginC\NLSF\_nlfuser3.fit(40) :Error, general compile error
C:\Documents and Settings\Administrator\Application Data\OriginLab\Origin75E\User Files\OriginC\NLSF\_nlfuser3.fit(31) :Error, error(s) found in compiling function _nlsfuser3
不知道公式哪里错了还是怎么回事高手指点一下谢谢啦

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