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关于matlab fixunknowns函数问题给出我的解答(Give me answers about the issue of the matlab fixunknowns function)

fit_maxwell_pdf - Non Linear Least Squares fit of the maxwellian distribution. given the samples of the histogram of the samples, finds the distribution parameter that fits the histogram samples. fits data to the probability of the form: p(r) = sqrt(2/pi)*(a^(-3/2))*(r^2)*exp(-(r^2)/(2*a)) with parameter: a format: result = fit_maxwell_pdf( x,y,W,hAx ) input: y - vector, samples of the histogram to be fitted x - vector, position of the samples of the histogram (i.e. y = f(x,a)) W - matrix or scalar, a square weighting matrix of the size NxN where N = length(y), or 0 to indicate no weighting is needed. hAx - handle of an axis, on which the fitted distribution is plotted if h is given empty, a figure is created. output: result - structure with the fields a - fitted parameter VAR - variance of the estimation type- weighted LS or not weighted LS iter- number of iteration for the solution

神经网络30个案例分析源码，又名智能控制30个案例分析,案例二，BP神经网络拟合(30 case studies of neural network source code, also known as intelligent control 30 case studies, case two, BP neural network fit)

运用matlab解决实际电路问题，里面包含完整的code文件以及8个figures(Use matlab to solve electrical problems)

该软件包包括半监督算法S4VM，对无标签数据不产生衰退现象，或安全半监督算法的MATLAB代码。(The package includes the MATLAB code of the semi-supervised algorithm S4VM, which towards making unlabeled data never hurt, or safe semi-supervised algorithm.)

介绍matlab相关组件的功能，便于安装时能够正确选择(Introduction matlab function of related components, easy to install right choice)

经典MUSIC算法，带有空间前向平滑功能(Classical MUSIC algorithm with spatial smoothing function )

matlab 仿真实例，对于matlab仿真具有很重要的意义(matlab simulation, matlab simulation for a very important significance)

采用matlab的m语言编写，功能为rake接收机的链路生成。其中包含短码生成，业务信道长码生成，瑞利衰落信道代码， 哈达码变换，用户原始数据扩频以及信道衰落。(M using matlab)

L-system and IFS are used to the plant s simulation. In this package the theories of L-system and IFS were concisely described. The excellence and short of constructing Fractal image with L-system or IFS were discussed. So a method was put forward in this package. At last the three-dimension tree model ceatrs successfully based on L-system and IFS.