拟合函数时出错，请教大神如何解决

m文件：function f=nihehanshu(x,xdata)
f=(9.516e-6)*exp(x(1).*xdata+x(2).*xdata.^2/2)*(1+4*1.01e5*(x(3)+x(4).*xdata+x(5).*xdata.^2)).^(-1/4)*4/3

命令窗口：
xdata=[293.874,396.817,491.807,594.812,697.754,792.807,895.687,998.63,1101.51,1196.93,1204.33,1291.86,1299.32,1394.81,1402.26,1497.19,1600.07,1702.89,1797.76,2209.15,2256.43,2738.28,3242.81,3612.59];
ydata=[95.4882,95.6257,95.7631,95.881,96.0185,96.1364,96.2933,96.4308,96.5887,96.5887,96.7642,96.7455,96.9016,96.883,97.039,97.1959,97.3528,97.5293,97.7056,98.3724,98.5093,99.5277,100.917,102.168];
x0=[10,10,10,10,10];
[x,resnorm]=lsqcurvefit(@nihehanshu,x0,xdata,ydata)
??? Error using ==> mtimes
Inner matrix dimensions must agree.
Error in ==> nihehanshu at 2
f=(9.516e-6)*exp(x(1).*xdata+x(2).*xdata.^2/2)*(1+4*1.01e5*(x(3)+x(4).*xdata+x(5).*xdata.^2)).^(-1/4)*4/3
Error in ==> lsqcurvefit at 209
initVals.F = feval(funfcn_x_xdata{3},xCurrent,XDATA,varargin{:});
Caused by:
Failure in initial user-supplied objective function evaluation. LSQCURVEFIT cannot
continue.

你的目标函数错误，自己核查一下。MATLAB不一定好用，可以试试origin 1stopt之类的软件

期待看到有用的回答！