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Check a column, if a condition is met use those value

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sivalogan satchithanandamoorthy
编辑： Jan 2017-6-19
I have excel file containing cyclic data of 25 by 1000. Let say column 3 represent cycle. i was able to plot the data for all cycle. The problem is I am not sure how to plot for specific cycle. sample date could be: A=[1,2,1,4,5;6,7,1,9,10;11,12,1,14,15;16,17,2,19,20;21,22,2,24,25;26,27,2,29,30]
My question is how to chose date from other column when column 3 is specific cycle.(it could be 1, 2, 3 or 1 to 5 or 10 11 13).
Any help would ne much appricated

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KSSV
KSSV 2017-6-19
A=[1,2,1,4,5;6,7,1,9,10;11,12,1,14,15;16,17,2,19,20;21,22,2,24,25;26,27,2,29,30] ;
%%pick cycle 1
c1 = A(A(:,3)==1,:)
%%pick cycle 2
c2 = A(A(:,3)==2,:)
  1 个评论
Jan
Jan 2017-6-19
编辑：Jan 2017-6-19
+1. And pick cycles 1 to 5:
c1_5 = A(A(:,3) >= 1 & A(:,3) <= 5, :)
or
c1_5 = A(ismember(A(:,3), 1:5), :)

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更多回答（1 个）

Guillaume
Guillaume 2017-6-19
If all the cycles are the same length and all the samples from a cycle are together, as in your example, you would be better off reshaping your matrix as 3D, with the cycles in the 3rd dimension
A = reshape(A, cyclelength, size(A, 2), []); %where cyclelength is the length of a cycle
It is then trivial to plot any cycle:
hold on
for cyclenumber = 1 : size(A, 3)
plot(A(:, 1, cyclenumber)) %plot column 1 of cycles, for example
end

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