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hi
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Sav 0.225 0.30 0.35 0.40 0.45 0.475
Qi 0.251 0.90 2.02 3.63 7.2 9.800
If I have to find Fraction flow "Fo"=dSav/dQi the answer are
Fo 0.1127 0.0525 0.038 0.025 0.0112 0.00778
How can I get the answer?
1 个评论
laurie
2012-4-13
sorry i feel stupid but how can you get 55columns in Fo if you are using dSav =(Sav(n)-Sav(n-1)) and dQi =(Qi(n)-Qi(n-1))? should it be 5 colums instead ?
then you can use something like Fo=dSav ./ dQi (adding . before an operator allows you to make that operation element by element in vectors)
回答(1 个)
Thomas
2012-4-13
Sav=[0.225 0.3 0.35 0.4 0.45 0.475 ]
Qi=[0.251 0.90 2.02 3.63 7.2 9.8 ]
Fo=diff(Sav)./diff(Qi)
you can only get 5 values in Fo since you are taking the difference between adjacent values ,. output will have n-1 values..
2 个评论
Thomas
2012-4-13
Then your data set is not necessarily the same ( you might have more digits of precision, though that should not change the answer too much..). MATLAB cannot give different solutions with the same date and same code (unless you have a random number generator in between changing random seeds..)
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