Output from a function as an argument to another function

Question

Shengyue Shan 2018-11-1

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https://ww2.mathworks.cn/matlabcentral/answers/427435-output-from-a-function-as-an-argument-to-another-function

评论： Shengyue Shan 2018-11-2

Hello, I am trying to use the output from a function as the input to another function. As shown below, X0,Xb,Tf,X3,X4,X5 are all scalar that has been defined. u is the result pulled out from the solver. I wrote function ICN and function WF in independent .m files, and I need to solve for c.

function X1 = ICN(u,X0,Xb,Tf)
if u <= Tf
X1 = (X0-Xb)*(1-Tf/u);
else
X1 = 0;
end
function X2 = WF(u,X0,Xb,Tf)
if u <= Tf
X2 = Xb +(X0-Xb)*Tf/u;
else
X2 = X0
end
function c = SH(u,X1,X2,X3,X4,X5)
c1 = 1*u;
c2 = 2*u;
c3 = 3*u;
c4 = 4*u;
c5 = 5*u;
c = c1*X1 + c2*X2 + c3*X3 + c4*X4 + c5*X5;
end

I tried writing it as

c = @(~,state)SH(state.u,X1,X2,X3,X4,X5)

But it does not seem to be right. How to write this correctly? I'd appreciate any help! Thank you very much!

Best regards, Shengyue

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TADA 2018-11-1

are you trying to pass c as input to ICN and WF or the other way arround?

Shengyue Shan 2018-11-1

No, pass X1 and X2 as input to SH. I just figured it out. Thanks!

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Answer 1

dpb 2018-11-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/427435-output-from-a-function-as-an-argument-to-another-function#answer_344656

编辑：dpb 2018-11-1

在 MATLAB Online 中打开

In main script or calling function

...
u=...
X0=...
X3=...
X4=...
X5=...
Xb=...
Tf=...
X1=ICN(u,X0,Xb,Tf)
X2=WF(u,X0,Xb,Tf)
c=SH(u,X1,X2,X3,X4,X5)

NB: Function

function c = SH(u,X)
  c=cumprod((1:5)*u,X);
end

if you would not write independent variables for X1 thru X5 but use an array (it's the MATLAB way...)

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Shengyue Shan 2018-11-2

Hello dpb, Thank you very much for your answer! I have another way for the subscript, but thank you for the suggestions! I will try it for the future; ) Best regards, Shengyue Shan

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