pls who knows wat y=x(100:1000) means thanks in advance
MATLAB: Y=x(100:1000)
colon operatormatrix indexing
Related Solutions
Use dots after * and / (element wise operation):
[x y]=meshgrid(13:120,1:12);igx1=((x.*y.^3)/12)+(x.*y).*((((x.*y).*(150-(y./2))+113664+6000)./((x.*y)+1536+1200))-(150-(y./2))).^2;igx2=2097152+1536.*((((x.*y).*(150-(y./2))+113664+6000)./((x.*y)+1536+1200))-74).^2;igx3=10000+1200.*((((x.*y).*(150-(y./2))+113664+6000)./((x.*y)+1536+1200))-5).^2;z=igx1+igx2+igx3;surf(x,y,z)
If you have image processing toolbox
M = rand(1000, 1000);M_new = blockproc(M, [10 10], @(x) mean(x.data, 'all'))Alternative Solution 1: (surprisingly the fastest)
M_new = conv2(M, ones(10)/100, 'valid');M_new = M_new(1:10:end, 1:10:end);Alternative Solution 2:
M_C = mat2cell(M, 10*ones(1,100), 10*ones(1,100));M_new = cellfun(@(x) mean(x, 'all'), M_C);Alternative Solution 3:
M_new = zeros(size(M)/10);for i=1:100 for j=1:100 M_new(i, j) = mean(M(10*(i-1)+1:10*i,10*(j-1)+1:10*j), 'all'); endend
Best Answer