how shall i keep the particular position of a column of a matrix to to repeat for all other columns?????

Question

suchismita 2014-6-18

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https://ww2.mathworks.cn/matlabcentral/answers/135061-how-shall-i-keep-the-particular-position-of-a-column-of-a-matrix-to-to-repeat-for-all-other-columns

评论： suchismita 2014-6-18

采纳的回答： Andrei Bobrov

在 MATLAB Online 中打开

this is a code ::::

a1=rand(10,10);

a=a1(:,1);

a=a';

c=ceil(a); %% when err=1 err=1;

    maxValueRowWise=max(a');
    for k=1:length(maxValueRowWise)
        c(a==maxValueRowWise(k))=0;
    end
%     disp('For err=1')
%     c
%%when err=2
err=2;
    s=sort(a,2);
    twoMaxValueRowWise=s(:,end-1:end);
    for k=1:numel(twoMaxValueRowWise)
        c(a==twoMaxValueRowWise(k))=0;
    end
%     disp('For err=2')
%     c
%%when err=3
err=3;
    s=sort(a,2);
    ThreeMaxValueRowWise=s(:,end-2:end);
    for k=1:numel(ThreeMaxValueRowWise)
        c(a==ThreeMaxValueRowWise(k))=0;
    end
%     disp('For err=3')
%     c
    %%when err=4
err=4;
    s=sort(a,2);
    ThreeMaxValueRowWise=s(:,end-3:end);
    for k=1:numel(ThreeMaxValueRowWise)
        c(a==ThreeMaxValueRowWise(k))=0;
    end
    disp('For err=')
    c
     [y]=find(c==0)

here y indicates the position of error now in a1 the y row element every node will give wrong answer if by round(a1) is 1 than 0 else 1.

this whole process will be running for 10 times and in every iteration this y wont change and it will give error. plz plz plz help me out....

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suchismita 2014-6-18

ya here i have set maximum values but can i set as in between values from 0.8 to 0.3.....4 highest values will be taken....?????

suchismita 2014-6-18

with maximum value first i want to check i can do this or not...than in my assignment i have to do for minimum and in between 0.8 to 0.3

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Answer 1

Andrei Bobrov 2014-6-18

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/135061-how-shall-i-keep-the-particular-position-of-a-column-of-a-matrix-to-to-repeat-for-all-other-columns#answer_141516

在 MATLAB Online 中打开

[~,jj] = sort(a(:),'descend');
y1 = sort(jj);
y = y1(1:err);

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suchismita 2014-6-18

can you explain it plzzzz... in a1 if the error positions are 2 8 9 10 then in a(2,:),a(8,:),a(9,:),a(10,:) will say as 0. (only in first column checking for maximum value is done not in others)....this will be carried for 10 iteration and in every iteration 2 8 9 10 will be the error positions

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