How do I populate the next term in an If/elseif code?

Here's my code:

N=[];

for i=1:length(timeStep);

    if timeStep(i)>33;
      N(i)=1;
    elseif timeStep(i)<=33;
      N(i)=0;
    end
end
n=N';
n(1)=1;

If timeStep at i is greater than 33, I would like N of the NEXT term (i+1) to be populated with a 1. However, changing the code to N(i+1)=1 does not work.

What would make this work for me?

Thank you in advance.

Answer 1

[Michael Haderlein]

Why should it not work to change it to N(i+1)=1?

I'm wondering what's the desired output for timeStep between 35 and 40?

In any case, you can very simply vectorize the code:

N=[1 timeStep>40];

[Alan Gallagher]

Michael,

In a nutshell, timeStep represents a data point taken every 32 seconds. However, when the car is off, the timeStep is much larger than 32 seconds, but is only recorded once.

The timeStep vector looks something like ...32 32 32 32 500 32 32... so when it reads 500, i need the next value in N to be 1. In other words, the 1st 32 value after a larger number should have a 1 in the N vector to go with it.

Does this help?

[Alan Gallagher]

N acts as a "switch"

[Michael Haderlein]

I think that's what my code line is doing:

>> timeStep=[32 32 500 32 32 32 32 500 32 32];
>> N=[1 timeStep>40];
>> [timeStep;N(1:end-1)]
ans =
    32    32   500    32    32    32    32   500    32    32 % <--timeStep
     1     0     0     1     0     0     0     0     1     0 % <--N
%                      ^first after 500              ^first after 500

Here you can compare timeStep and N. Of course, N will have one more value, so I removed the last one for the comparison.

[Alan Gallagher]

Thanks Michael, this worked!