MATLAB中p(sigma==0 & x

MATLAB中p(sigma==0 & x matlab二元正态分布mvnpdf中Sigma矩阵式什么意思啊?mu = [1 -1]; Sigma = [.9 .4; .4 .3];[X1,X2] = meshgrid(linspace(-1,3,25)',linspace(-3,1,25)');X = [X1(:) X2(:)];p = mvnpdf(X,mu,Sigma);surf(X1,X2,reshape(p,25,25));如果我要单单该Si matlab中P=subs(P,'t', MATLAB程序的注释 蒙特卡洛模拟!Randn('seed',0);nuT=(r-0.5*sigma^2)*T;Sit=sigma*sqrt(T);Discpayoff=exp(-r*T)*max(0,s0*exp(nuT+sit*randn(Nu,1))-K);[eucall,varorice,ci}=normfit(discpayoff)Randn('seed',0);nuT=(r-0.5*sigma^2)*T;Sit=sigma*sqrt(T) matlab的定积分quad表达式不对,求救pb=quad(inline('(exp(-(x-mu)^2/2/sigma^2)/sigma/sqrt(2*pi))','x'),0,s)式子中x是积分变量,其他都是定值,系统提示不对,不知道怎么弄了, 请教matlab中sigma函数的详细意义 matlab中 p=[-1:.05 :1] matlab中 P为矩阵 P（P~=0)=1 求大神帮忙这个式子怎么用matlab做出图像来.Y[N]=sigma k 是0到10 乘X[n-k] matlab中如何将连续函数离散化比如高斯钟方程zi = A*exp( -0.5* ((X-center_x).^2/(sigma^2) + (Y-center_y).^2/(sigma^2))) ;想把zi以矩阵形式表示,X,Y表示行列,zi表示深度.即zi（X,Y）=? matlab编程问题 ,不知哪里出错S0=50;K=5;r=0.2;sigma=0.3;T=0.5;q=0;random_A=randn(1000);a=428.5912b=246.7252c=-801.6449for i=1:10; for j=1:100; A(i,j)=S0*exp((r-sigma^2/2)*T+sigma*random_A(i,j)*sqrt(T)); if A(i,j)>K; b*A(i,j)+c *(A(i,j)^2)-A(i 用matlab求解一元三次方程lear all;syms k rowl rowg sigma ug ul R m w;rowl=745.1143;rowg=34.7859;sigma=0.072;ug=7;ul=4;R=0.1;m=0.1*R;w=50;s=solve('0.5*k*m*rowg*rowl*(ug-ul)^2-(k*sigma-(rowl-rowg)*w^2*R/k)*(0.5*k*m*rowl+rowg)=0','k');s=simplify matlab中'代表什么意思?如p=(1,2: matlab plot画图麻烦高手看看这段小程序,如果要把每条线用虚线,圆点之类的区分开来而不仅仅是颜色的区分,该如何修改?x=[0:0.02:10];x=sort(x');sigma=[0.8,1.2,1.5,2.0]; y1=[];for i=1:length(sigma)y1=[y1,raylpdf(x, matlab mu = [1 2]; Sigma = [1 .5; .5 2]; R = chol(Sigma); z = repmat(mu,100,1) + randn(100,2)*R;谁能帮我解释上面的代码的意思?摘自 randn的帮助文档 CPK=1.33,为何是用8sigma/6sigmaCPK=1.67,是用10sigma/6sigma matlab中P(:,:, matlab中p(i,: