How to add an extra for loop

Question

suleiman abdullahi 2020-9-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/600409-how-to-add-an-extra-for-loop

评论： suleiman abdullahi 2020-9-26

I have a time series data which is 46723-by -1. I want to populate another matrix with some specific time series. this is the code i have.

newTime = zeros(); % the new array with 4 columns, each column to have a specified time series
for j = 1:length(time)
    if time(j) >=7 && time(j) <= 11
        newTime(j,1) = time(j) ;
    elseif time(j) >=56 && time(j) <= 59
        newTime(j,2) = time(j) ;
    elseif time(j) >=99 && time(j) <= 106
        newTime(j,3) = time(j) ;
    elseif time(j) >=133 && time(j) <= 143
        newTime(j,4) = time(j) ;
    end
end

Now the above code works fine, however, as you can see the columns of the newTimes has (1,2,3,4) which i want to do in a loop, is there a way to do this?

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Answer 1

KSSV 2020-9-26

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https://ww2.mathworks.cn/matlabcentral/answers/600409-how-to-add-an-extra-for-loop#answer_500956

newTime = cell(1,4);  % cell because, we are not sure of dimensions in each case 
R = [7 11 ; 56 59 ; 99 106 ; 133 143 ] ;   % the four case ranges 
for i = 1:4
  newTime{i} = time(time >=R(i,1) && time <= R(i,2)) ; 
end

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suleiman abdullahi 2020-9-26

Thanks for the answer, however, this generates the follwoing error.

Operands to the || and && operators must be convertible to logical scalar values.
Error in Day2 (line 72)
  newTime{i} = time(time >=R(i,1) && time <= R(i,2)) ;