# MATLAB: To Run A For-Loop

for loopmatrix

Hi,
Here is a coding where fx1 to fx16 is varying in steps of 2 and fy1 to fy16 is constant(2). Can anyone help me in writing the frequency from first row to fourth row using ' for-loop' so that it gives the same pattern as it is giving now.
The Code:
    % Frequency Of The First Row      fx1=2;fy1=2;      fx2=4;fy2=2;      fx3=6;fy3=2;      fx4=8;fy4=2;    % Frequency Of The Second Row    fx5=10;fy5=2;    fx6=12;fy6=2;    fx7=14;fy7=2;    fx8=16;fy8=2;    % Frequency Of The Third Row    fx9=18;fy9=2;    fx10=20;fy10=2;    fx11=22;fy11=2;    fx12=24;fy12=2;    % Frequency Of The Fourth Row      fx13=26;fy13=2;      fx14=28;fy14=2;      fx15=30;fy15=2;      fx16=32;fy16=2;    M=zeros(512);    a=128;    b=128;    [x,y]=meshgrid(-1:2/127:+1, -1:2/127:+1);    circ=sqrt(x.^2+y.^2)<1;    % Generation Of Holograms    h1=circ.*(cos((x*pi*fx1)+(y*pi*fy1)))>0;    h2=circ.*(cos((x*pi*fx2)+(y*pi*fy2)))>0;    h3=circ.*(cos((x*pi*fx3)+(y*pi*fy3)))>0;    h4=circ.*(cos((x*pi*fx4)+(y*pi*fy4)))>0;    h5=circ.*(cos((x*pi*fx5)+(y*pi*fy5)))>0;    h6=circ.*(cos((x*pi*fx6)+(y*pi*fy6)))>0;    h7=circ.*(cos((x*pi*fx7)+(y*pi*fy7)))>0;    h8=circ.*(cos((x*pi*fx8)+(y*pi*fy8)))>0;    h9=circ.*(cos((x*pi*fx9)+(y*pi*fy9)))>0;    h10=circ.*(cos((x*pi*fx10)+(y*pi*fy10)))>0;    h11=circ.*(cos((x*pi*fx11)+(y*pi*fy11)))>0;    h12=circ.*(cos((x*pi*fx12)+(y*pi*fy12)))>0;    h13=circ.*(cos((x*pi*fx13)+(y*pi*fy13)))>0;    h14=circ.*(cos((x*pi*fx14)+(y*pi*fy14)))>0;    h15=circ.*(cos((x*pi*fx15)+(y*pi*fy15)))>0;    h16=circ.*(cos((x*pi*fx16)+(y*pi*fy16)))>0;    % An Array Of 4x4 Holograms(Concatenation)    % First Row Of Holograms    M(1:a, 1:b) = h1; %M(1, 1)    M(1:a, b+1:b*2) = h2; %M(2, 1)    M(1:a, 2*b+1:b*3) = h3; %M(3, 1)     M(1:a, 3*b+1:b*4) = h4; %M(4, 1)    % Second Row Of Holograms    M(a+1:a*2, 1:b) = h5;%M(1, 2)     M(a+1:a*2, b+1:b*2) = h6; %M(2, 2)     M(a+1:a*2, 2*b+1:b*3) = h7; %M(3, 2)     M(a+1:a*2, 3*b+1:b*4) = h8; %M(4, 2)    % Third Row Of Holograms    M(2*a+1:a*3, 1:b) = h9; %M(1, 3)    M(2*a+1:a*3, b+1:b*2) = h10; %M(2, 3)    M(2*a+1:a*3, 2*b+1:b*3) = h11; %M(3, 3)     M(2*a+1:a*3, 3*b+1:b*4) = h12; %M(4, 3)     % Fourth Row Of Holograms    M(3*a+1:a*4, 1:b) = h13; %M(1, 4)    M(3*a+1:a*4, b+1:b*2) = h14; %M(2, 4)    M(3*a+1:a*4, 2*b+1:b*3) = h15; %M(3, 4)    M(3*a+1:a*4, 3*b+1:b*4) = h16; %M(4, 4)    figure(1)     imagesc(M),colormap gray; axis image; axis off     title('Array Of 4x4 Holograms');    %Fourier Transform    z=fftshift(fft2(M,512,512));    q=abs(z);    figure(2)    imagesc(q); colormap gray; axis image; axis off    title('Focal Spots Of Grating Array');

fx = 2:2:2^5;fy = 2;a=128;b=128;[x,y] = meshgrid(linspace(-1,1,128));circ=sqrt(x.^2+y.^2)<1;h = bsxfun(@times,circ,cos(pi*bsxfun(@plus,bsxfun(@times,x,reshape(fx,1,1,[])),fy*y)))>0;n = size(h);M = cell2mat(reshape(mat2cell(h,n(1),n(2),ones(n(3),1)),4,[]))';figure(1) imagesc(M),colormap gray; axis image; axis off title('Array Of 4x4 Holograms');    %Fourier Transformz=fftshift(fft2(M,512,512));q=abs(z);    figure(2)imagesc(q); colormap gray; axis image; axis offtitle('Focal Spots Of Grating Array');
fx = 2:2:2^5;fy = 2;a=128;b=128;c=512;[x,y] = meshgrid(linspace(-1,1,128));circ=sqrt(x.^2+y.^2)<1;for j1 = numel(fx):-1:1    h{j1} = circ.*cos(pi*(x*fx(j1) + y*fy));endM = cell(c/a);M(:) = h;M = cell2mat(M');figure(1) imagesc(M),colormap gray; axis image; axis off title('Array Of 4x4 Holograms');    %Fourier Transformz=fftshift(fft2(M,512,512));q=abs(z);    figure(2)imagesc(q); colormap gray; axis image; axis offtitle('Focal Spots Of Grating Array');