MATLAB: How to record the location of a specific value in a set of data

indexinglocation

Hello,

I am very new to matlab, and would appreciate advice!

I understand my question is not entirely clear. So I am trying to go through data that looks like:

[1] 0 0 0 0 1 0 1 0 0

And want the code to index until it encounters the first 1 (ignoring the rest of the 1s repeated in the row) then state the distance from the start of the row to the first 1 [so here it would be the distance from column 5 to column 1]

Then ideally it would repeat the same thing for a second row. My 'for' loop is not working, and ideally this code would work for dozens of rows of data. Thank you 🙂

Best Answer

First_1 = find(x,1) % where x is your row in the loop 
Distance = diff(find(x,2))

Related Solutions

MATLAB: How to repeat a code and build upon previous run’s results

Try this. I hope I understand you right.

CostsMtx=[16,18,17,20,17;25,27,29,32,28;1.5,1.6,1.7,2,1.8;50,54,56,60,57;60,63,65,68,64];
supply=[800,600,1000,400,100];
demand=[870,435,725,464,406];
mtxsz=size(CostsMtx);
%%%%%%%%%%
tmtx=CostsMtx;
res=zeros(mtxsz);
%%%%%%%%%
R=supply;
D=demand;
%repeat infinum times
while true
  x=min(tmtx(tmtx>0));
    %if there are no any x>0 then stop repeat
    if isempty(x)
      break;
    end
    [Row,Col]=find(tmtx==x);
    rm=R(1,Row);
    dm=D(1,Col);
    if R(1,Row)==0
        tmtx(Row,Col)=0;
    end
    if D(1,Col)==0
        tmtx(Row,Col)=0;
    end
    if rm<dm
        res(Row,Col)=tmtx(Row,Col)*R(1,Row);
        D(1,Col)=D(1,Col)-R(1,Row);
        R(1,Row)=0;
        tmtx(Row,Col)=0;
    end
    if dm<rm
        res(Row,Col)=tmtx(Row,Col)*D(1,Col);
        R(1,Row)=R(1,Row)-D(1,Col);
        D(1,Col)=0;
        tmtx(Row,Col)=0;
    end
  end
    %%%%%%%

MATLAB: How to do a quick division between a column array and a matrix

Hi Benson, try this

% b = randi(25,25,1);
% A = randi(25,25,5);
[row,col] = find(abs(A(:,:))>0);
dividCol = bsxfun(@rdivide,b(row,1),A(row,col));

Best Answer

Related Solutions

MATLAB: How to repeat a code and build upon previous run’s results

MATLAB: How to do a quick division between a column array and a matrix

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