Equation- Divide by Vector

Question

Iason 2014-3-14

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https://ww2.mathworks.cn/matlabcentral/answers/121562-equation-divide-by-vector

回答： Benjamin Avants 2014-3-14

Hello, I`m a beginner and I would like to calculate the equation [Sd(t)=ag S 2.5 Tc/q T] for values of Tc<=T<=Td However, T is a vector and I don`t know how to divide an vector and make the results in a final vector form. This is my code:

clc;clear all; agd=0.24*9.81; S=1.15;

Tb=0.2; S=1.15; Tc=0.6; Td=2; q=2;

for T3=Tc:0.02:Td; M=agd*S*2.5*Tc/q; Sd3=M/T3 end

In this way I get the results, but not in a vector form.

Thanks in advance

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Answer 1

Benjamin Avants 2014-3-14

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在 MATLAB Online 中打开

Your code is a little hard to read... I would suggest not stringing commands together on the same line.

That being said...

You will want to use the .* and ./ operators. They will perform operations on each element of an array and return an array.

Example:

agd = 0.24*9.81;
S = 1.15;
Tb = 0.2;
Tc = 0.6;
Td = 2;
q = 2;
T3 = Tc:0.02:Td;
constant = (agd * S *2.5 * Tc / q);
Sd3 = constant ./ T3;

Solving for the constant first will reduce the number of computations MATLAB has to do to return your answer. Not so important here, but useful with large data sets.