how to write equation in matlab ??

Question

ajeet verma 2017-8-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/351831-how-to-write-equation-in-matlab

回答： Meghan van Rooyen 2021-11-30

equations and corresponding graph is given in attached file and i am trying like this but unable to find second graph where is wrong,, please help

%reflection function
s = @(x) (1-0.4*(cos(x/100))).*(0<=x & x<=511);
x = linspace(0, 500);
R = s(x);
figure(1)
plot(x,R)
axis([xlim 0 1.5]) 
% intensity function
f=1/20;
x = linspace(0, 500);
I=@(x) (R(x).*sin(2*pi*f*x));
plot(x,I)
axis([xlim 0 1.5])

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Pari Bajalan 2020-3-21

∑3k

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Torsten 2017-8-7

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/351831-how-to-write-equation-in-matlab#answer_277095

在 MATLAB Online 中打开

I=@(x) s(x).*sin(2*pi*f*x); 
plot(x,I(x))

Best wishes

Torsten.

8 个评论
显示 6更早的评论隐藏 6更早的评论

ajeet verma 2017-8-14

编辑：Torsten 2017-8-14

在 MATLAB Online 中打开

why am i not getting color fringe pattern where am i wrong ?, please help my code is here;

%%trapezoidal color fringes (vertical)
clc;
clear all;
f1=10;                              % No. of vertical fringes
f2=0;                               % No. of horizontal fringes
m=1000;
n=1000;
a1 = zeros(m,n) ;
a2 = zeros(m,n) ;
a3 = zeros(m,n) ;
% trapezoidal fringe
imx=8;
imn=2;
T = 20;
s1= @(x) (imx+imn).*((0<=x & x<=T/6)|(x>=5*T/6 & x<=T))...
                +(imx+imn*(2-6*x/T)).*(T/6<=x & x<=T/3)...
                +(imx).*(T/3<=x & x<=2*T/3)...
                +(imx+imn*(6*x/T-4)).*(2*T/3<=x & x<=5*T/6);
s2= @(x) (imx+imn*(6*x/T)).*(0<=x & x<=T/6)...
                +(imx+imn).*(T/6<=x & x<=T/2)...
                +(imx+imn*(4-6*x/T)).*(T/2<=x & x<=2*T/3)...
                +(imx).*(2*T/3<=x & x<=T);
s3= @(x) (imx).*(0<=x & x<=T/3)...
                +(imx+imn*(6*x/T-2)).*(T/3<=x & x<=T/2)...
                +(imx+imn).*(T/2<=x & x<=5*T/6)...
                +(imx+imn*(6-6*x/T)).*(5*T/6<=x & x<=T);
x = linspace(0,20,50);            
X = repmat(x, 1000, 20);
I1 = s1(X);
I2 = s2(X);
I3 = s3(X);
% figure(1)
% subplot(131),imshow(I1,[])
% subplot(132),imshow(I2,[])
% subplot(133),imshow(I3,[])
a1=exp(1i*I1);
a2=exp(1i*I2);
a3=exp(1i*I3);
subplot(131),imshow(a1,[]),impixelinfo;
subplot(132),imshow(a2,[]),impixelinfo;
subplot(133),imshow(a3,[]),impixelinfo;
Color=zeros(m,n,3);
Color(:,:,1)=a1;
Color(:,:,2)=a2;
Color(:,:,3)=a3;
figure(2)
imshow(Color),title('vertical fringes'),impixelinfo;