Array indices must be positive integers or logical values. error for simple calculation, nothing array related

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William
William 2024-1-24
评论： Walter Roberson 2024-1-29
Ran in:
Hello, forgive me for this probably dumb question. I am super new to matlab and at the moment I am just trying to use Matlab for tedious calculations. Can you guys help figure out why this error shows up when I am just doing simple calculations? Thank you very much.
My code:
v1 = (4*5*10^-4)/(pi*(0.01)^2);
v2 = (4*5*10^-4)/(pi*(0.02)^2);
g = 9.81;
hb = 2;
deltaH = 1/g(0.5*v1^2-g*hb-0.5*v2^2) - 2.01;
Array indices must be positive integers or logical values.

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回答（1 个）

Umang Pandey
Umang Pandey 2024-1-24
编辑：Umang Pandey 2024-1-24
Hi William,
The error is because while you are trying to divide the "deltaH" expression by "g", it is instead getting treated as an array instead.
You can reformulate it in the following manner -
v1 = (4*5*10^-4)/(pi*(0.01)^2);
v2 = (4*5*10^-4)/(pi*(0.02)^2);
g = 9.81;
hb = 2;
deltaH = (0.5*v1^2 - g*hb - 0.5*v2^2)/g - 2.01;
Hope this helps!
Best,
Umang
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