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What this means sum( time(i,1:i-1) ) ?

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Ami
Ami 2011-6-4
time is a 5X5 matrix I want to know what means time(i,1:i-1) , I'm new at matlab
But I mean what does i,1:1-1 do whit the matrix, I know the results that this send, but I want to know like, It means that is taking the data from the matrix at.... something like that, thanks...

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Fangjun Jiang
Fangjun Jiang 2011-6-4
See it yourself: type the following lines one at time at the Matlab command window
time=magic(5)
i=4
time(i,1:i-1)
sum(time(i,1:i-1))
  2 个评论
Matt Fig
Matt Fig 2011-6-4
Or, perhaps:
time = magic(5)
for ii = 1:5
T = time(ii,1:ii-1)
sum(T)
end
Run this and look at the output...
Fangjun Jiang
Fangjun Jiang 2011-6-4
Good catch, Matt! I changed the value of i from 1 to 4 to avoid confusion.

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