作业帮用matlab编写函数用matlab编写一个lagrange插值函数function [yy] = interp_lagrange(x,y,xx)n = prod(size(x)); [m2,n2] = size(xx);yy = zeros(m2,n2);for i = 1:nli = ones(m2,n2);for j = 1:nif j = i =i; li = li.*(xx-x(j))/(x(i)-x(j));endendyy =
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![用matlab编写函数用matlab编写一个lagrange插值函数function [yy] = interp_lagrange(x,y,xx)n = prod(size(x)); [m2,n2] = size(xx);yy = zeros(m2,n2);for i = 1:nli = ones(m2,n2);for j = 1:nif j = i =i; li = li.*(xx-x(j))/(x(i)-x(j));endendyy =](/uploads/image/z/3934533-21-3.jpg?t=%E7%94%A8matlab%E7%BC%96%E5%86%99%E5%87%BD%E6%95%B0%E7%94%A8matlab%E7%BC%96%E5%86%99%E4%B8%80%E4%B8%AAlagrange%E6%8F%92%E5%80%BC%E5%87%BD%E6%95%B0function+%5Byy%5D+%3D+interp_lagrange%28x%2Cy%2Cxx%29n+%3D+prod%28size%28x%29%29%3B+%5Bm2%2Cn2%5D+%3D+size%28xx%29%3Byy+%3D+zeros%28m2%2Cn2%29%3Bfor+i+%3D+1%3Anli+%3D+ones%28m2%2Cn2%29%3Bfor+j+%3D+1%3Anif+j+%3D+i+%3Di%3B+li+%3D+li.%2A%28xx-x%28j%29%29%2F%28x%28i%29-x%28j%29%29%3Bendendyy+%3D)
用matlab编写函数用matlab编写一个lagrange插值函数function [yy] = interp_lagrange(x,y,xx)n = prod(size(x)); [m2,n2] = size(xx);yy = zeros(m2,n2);for i = 1:nli = ones(m2,n2);for j = 1:nif j = i =i; li = li.*(xx-x(j))/(x(i)-x(j));endendyy =
用matlab编写函数
用matlab编写一个lagrange插值函数
function [yy] = interp_lagrange(x,y,xx)
n = prod(size(x));
[m2,n2] = size(xx);
yy = zeros(m2,n2);
for i = 1:n
li = ones(m2,n2);
for j = 1:n
if j = i =i;
li = li.*(xx-x(j))/(x(i)-x(j));
end
end
yy = yy + li*y(i);
end
end
为什么输入后,x、y、yy总被电脑用棕色或者红色波浪线标记出来?调用函数的时候为什么提示
>> x=linspace(-1,0,10);
>> y=1/(1+25*x*x);
Error using *
Inner matrix dimensions must agree.
>> interp_lagrange(x,y,4)
Undefined function or variable 'y'.
到底我该怎么编写一个函数并且调用?
用matlab编写函数用matlab编写一个lagrange插值函数function [yy] = interp_lagrange(x,y,xx)n = prod(size(x)); [m2,n2] = size(xx);yy = zeros(m2,n2);for i = 1:nli = ones(m2,n2);for j = 1:nif j = i =i; li = li.*(xx-x(j))/(x(i)-x(j));endendyy =
y=1./(1+25*x.*x)