how to convert a waveform in 2D matrix?

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ajeet verma
ajeet verma 2017-5-31
编辑： KSSV 2017-5-31
i want to generate triangular fringe pattern without using meshgrid function i have a code for triangular wave and i want to convert it into fringe pattern 2D matrix.
%triangular wave form
t=0:1/100:1;
f=5;
I3=asin(sin(2*pi*f*t));
plot(I3)

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KSSV
KSSV 2017-5-31
YOu can use repmat
%triangular wave form
t=0:1/100:1;
f=5;
I3=asin(sin(2*pi*f*t));
plot(I3)
N = 101 ;
iwant = repmat(I3,N,1) ;
pcolor(iwant)
shading interp
  1 个评论
ajeet verma
ajeet verma 2017-5-31
编辑：KSSV 2017-5-31
all right but i want to create matrix using for loop for example
% sinusoidal fringe fringe
m=1000;
n=1000;
f1=20; % No. of vertical fringes
f2=0; % No. of horizontal fringes
for i=1:m
for j=1:n
a(i,j)=exp(1i*(2*pi*(f1*j/n+f2*i/m)));
end
end
imshow(a,[])
this is sinusoidal fringe pattern and i want to create triangular as i asked

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