Adding an extra column

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bhador
bhador 2018-1-14
回答： John BG 2018-1-15
n = [0.037 ; 0.020 ; 0.015 ; 0.030 ; 0.022];
S = [0.0001 ; 0.0002 ; 0.0011 ; 0.0007 ; 0.0003];
B = [10 ; 8 ; 20 ; 24 ; 15];
H = [2 ; 1 ; 1.5 ; 3 ; 2.7];
Table = [n S B H];
U=(sqrt(S)/n).*((B.*H)/(B+(2.*H))).^(2/3)
I keep having zeros in the end, does anyone know what's wrong with my commands?
Thank you in advance.

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回答（2 个）

Walter Roberson
Walter Roberson 2018-1-15
The MATLAB operator for vector division is ./ not /
The / operator is algebraic matrix division. A/B is similar to A * pinv(B)
John BG
John BG 2018-1-15
Hi
this is John BG <mailto:jgb2012@sky.com jgb2012@sky.com>
Instead of
U=(sqrt(S)/n).*((B.*H)/(B+(2.*H))).^(2/3)
use
U=(sqrt(S)./n).*((B.*H)./(B+(2.*H))).^(2/3)
now
U =
0.342820077892896
0.609366151578033
2.639575139271204
1.580890997815293
1.243620437003919
is now U as expected?

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