In a loop, create an i x j matrix, find the average of each row, and find the minimum in which row.

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채호 박 2022-12-26

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https://ww2.mathworks.cn/matlabcentral/answers/1884462-in-a-loop-create-an-i-x-j-matrix-find-the-average-of-each-row-and-find-the-minimum-in-which-row

回答： DGM 2022-12-26

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Store matrix as i x j

store the difference between matrices m1 and m2 in m

After calculating the average value of each row of matrix m, which row has the minimum value is stored in k

m1 = [];
m2 = [];
% when img1 is up
for i = 1:5
    for j = 1:h2_t1
        st11H_t2 = st11H_t1(i:end,:,:);
        st22H_t2 = st22H_t1(1:end-i,:,:);
        p1 = impixel(st11H_t2, 1, j);
        m1 = [m1, p1];
        p2 = impixel(st22H_t2, w2_t1, j);
        m2 = [m2, p2];
    end
end
m1(~isfinite(m1))=0;
m2(~isfinite(m2))=0;

What should I do?

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Image Analyst 2022-12-26

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Please give a numerical example of your matrix and your desired output, like

m = magic(5)
m = 5×5
  24     1     8    15
   5     7    14    16
   6    13    20    22
  12    19    21     3
  18    25     2     9

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Answer 1

DGM 2022-12-26

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https://ww2.mathworks.cn/matlabcentral/answers/1884462-in-a-loop-create-an-i-x-j-matrix-find-the-average-of-each-row-and-find-the-minimum-in-which-row#answer_1136607

在 MATLAB Online 中打开

The answer is simple if you avoid the unnecessary loops.

inpict = uint8(randi([0 255],5,5)) % a 5x5 integer-class image
inpict = 5×5
   111   109    89    67   118
   129   139   165    13   148
   207    32    78    47    61
    51   127   171   203   147
   205   176    60   254   205
rowmean = mean(inpict,2) % dim2 mean
rowmean = 5×1
   98.8000
  118.8000
   85.0000
  139.8000
  180.0000
rowmin = min(inpict,[],2) % dim2 minima
rowmin = 5×1
   67
   13
   32
   51
   60