Multiple formulas in one function?

2018 3 31
1 个回答
回答已采纳
更新时间：2018 4 1
3 次查看（30 天）

0 个投票

Hi there!
I have attached 2 pics. There are 7 formulas, the second formula uses the output from the first formula, the third formula uses the output from the second one and so on.
My question is: could I put all these formula in just one function?
I’ve tried creating a function for each formula and after that to include all of them in one big function but it’s not working :(. I don’t know how to call the big function.
Maybe is there somebody and could give me hint for this.
Thank you!

请先登录，再回答此问题。

 采纳的回答

Image Analyst
Image Analyst 2018-3-31

0 个投票

Sure, just compute and return the numerical results
function [n,mu,M,lambda, etc] = Compute7Formulas(inputs)
n = ......whatever
M = ...... whatever....
lambda = whatever
% etc.

7 个评论
显示 5更早的评论 隐藏 5更早的评论

gblmtc
gblmtc 2018-3-31
Thank you!
I’ll give it a try! ;)
gblmtc
gblmtc 2018-3-31
I did the function as you said and I get this error.
Do you have any idea why?
Thank you!
function [tk,mk,ek,vk,uk,rk,ik,lamdak]= computeformulas(t,toe,mo,u,a,n,e,o,cuc,cus,crc,crs,io,i,cic,cis,oe,om,omo)
function [tk]= time(t,toe)
ti=t-toe;
if ti>302400
tk= ti-604800;
elseif tk<-302400
tk = ti+604800;
end
end
mk = mo +(sqrt(u)/sqrt(a^3)+n)*tk;
ek= mk/(1-e);
vk = atan(sqrt(1-e^2)*sin(ek))/cos(ek)-e;
uk = o + vk + cuc*cos(o+vk) + cus*sin(o+vk);
rk= a(1-e*cos(ek))+crc*cos(2)*(o+vk)+crs*sin(2)*(o+vk);
ik = io+i*tk+cic*cos(2)*(o+vk)+cis*sin(2)*(o+vk);
lamdak= omo + (om - oe)*tk - oe*toe;
end
This is the function I did! Is it ok that I put function in function?
Image Analyst
Image Analyst 2018-3-31
Nested functions are okay, but you should not name your function time since that is a built-in function. Also, you never seem to call the badly-named time inside computeformulas, and so the tk value will never be computed.
Next, what values did you pass in to computeformulas() for t, toe, mo, etc.? It doesn't look like you passed in anything.
gblmtc
gblmtc 2018-3-31
Again thanks for your help!
I’m pretty new working with the MATLAB and I’m all learning from the internet.
#1 I don’t understand what should I do with the function time ( as long as it’s a built-in one). Should I create it out and call it in the computeformulas function?
#2 regarding the values, what I did is the following: I first did the function and after that I manually introduced all the values ( t=3; toe=5;..) and after that , in editor I just pressed “ run” function. That’s not good, right?
Stephen23
Stephen23 2018-4-1
"I’m pretty new working with the MATLAB and I’m all learning from the internet."
There is a lot of outdated and really bad MATLAB advice on the internet. The best source for learning MATLAB is the MATLAB documentation:
https://www.mathworks.com/help/matlab/getting-started-with-matlab.html
https://www.mathworks.com/videos/getting-started-with-matlab-68985.html
Image Analyst
Image Analyst 2018-4-1
Make a separate m-file called test.m. In it, have these lines of code
t=3; % Define an input.
toe=5; % Define another input.
%etc. % Define even more inputs.
[n, mu, M, lambda, etc] = Compute7Formulas(t, toe, etc)
where you replace etc with all the other various variables you need. Then you can have the cursor in test.m (NOT in Compute7Formulas.m) and click the green run arrow or type F5.
gblmtc
gblmtc 2018-4-1
Thank you!
I will try that!

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Code Performance 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by