Command to get specific row and column data to be displayed in the code

2019 2 14
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更新时间：2019 2 14
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I wish to get the value of Voltage(First column) where my current(Second) changes its sign from negative to positive(or Vice versa there is not much difference in the two adjacent values). Can anyone suggest which command should i use to extract the voltage from the given spreadsheet and display it in my script?

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回答（1 个）

KSSV
KSSV 2019-2-14
编辑：KSSV 2019-2-14

0 个投票

% Make dummy data
A = [rand(10,1) rand(10,1)] ;
s = ones(10,1) ;
s(1:5) = -1;
A(:,2) = s.*A(:,2) ;
% get index of sign change
s = sign(A(:,2)) ;
idx = find(diff(s)~=0) ;
iwant = A(idx:idx+1,:)

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