2D Surface with periodic structure.
显示 更早的评论
Hello
Below is a section of code that I am working on. The basic idea is to create a surface 30mm square that has a surface that varies according to two sinewave functions. However, my code runs into issue in the Z assignment of the loop. Any help would be appreciated. Also if you have a more compact way
LengthX = 30; % X Length of sample in mm
LengthY = 30; % Y Length of sample in mm
X_k =2; % Number of Periods along X
Y_k =1; % Number of Periods along Y
DegX = pi .* X_k; %Degrees in X
DegY = pi .* Y_k; %Degrees in y
StepSize = 0.05; % Evenly Spaced X,Y gridpoints
x=0:StepSize:LengthX; y= 0:StepSize:LengthY;
NumXStep = DegX / length(x);
NumYStep = DegY / length(y);
Z = zeros(length(x), length(y));
for Counter = 0:1:length(x)
for Counter2 = 0:1:length(y)
% Z =(sin(x)+sin(y)),(-2*pi:0.1:2*pi),(-2*pi:0.1:2*pi);
Z[Counter, Counter2] = sin(NumXStep*Counter)+sin(NumYStep*Counter)
end
end
surf(x,y,Z)
采纳的回答
John BG
2017-8-17
Hi Michael
1.
LengthX = .03; % X Length of sample in mm
LengthY = .03; % Y Length of sample in mm
X_k =2; % Number of Periods along X
Y_k =1; % Number of Periods along Y
2.
Don't need DegX DegY
% DegX = 2*pi*X_k; % Degrees in X
% DegY = 2*pi*Y_k; % Degrees in y
3.
The frequencies are needed, but you haven't defined them
T1=.01 % 10mm
T2=.02 % 20mm
f1=1/T1
f2=1/T2
4.
Reduce the step to avoid poor resolution
StepSize = 0.0005; % Evenly Spaced X,Y gridpoints
x=[0:StepSize:LengthX];
y= [0:StepSize:LengthY];
% don't need for loop either
[X,Y]=meshgrid(x,y)
Z=sin(2*pi*f1*X)+sin(2*pi*f2*Y)
.
if you find this answer useful would you please be so kind to consider marking my answer as Accepted Answer?
To any other reader, if you find this answer useful please consider clicking on the thumbs-up vote link
thanks in advance
John BG
更多回答（1 个）
Walter Roberson
2017-8-16
2 个投票
In MATLAB, [] is never used for indexing, only for list construction.
类别
在 帮助中心 和 File Exchange 中查找有关 Data Import and Analysis 的更多信息
产品
Translated by 
