Doubt in matlab coding

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Ancy S G 2022-3-17

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https://ww2.mathworks.cn/matlabcentral/answers/1674044-doubt-in-matlab-coding

评论： Mathieu NOE 2022-3-29

采纳的回答： Mathieu NOE

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I want to get the output of this concept:

that is, if Eg>Egm

then output is Ns =5,6,7

Otherwise if Eg<Egm

output as Nb=1,2,3

else Nsb=4

I want to get corresponding N values for each condition.How to get this?

a=3;b=8;
Eg=[50 100 150 175 200 250 300];
Egm=Mean(Eg);
P=[20 15 10 5 1 0.5 0.1]
for N=1:1:7
    if Eg>Egm
        % output as Ns
    elseif Eg<Egm
        % output as Nb
    else
        %output as Nsb
        end
end

Based on this values,I want to compute following

Xs=(P(n)/a)-1;But value of P(n) is taken ony the value corresponding to Ns,that is 1,0.5,0.1

Xb=(P(n)/b)-1;But value of P(n) is taken ony the value corresponding to Nb,that is 20,15,10

Xsb=Eg; For the value Nsb

How this concept can be coded?

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采纳的回答

Mathieu NOE 2022-3-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1674044-doubt-in-matlab-coding#answer_920304

在 MATLAB Online 中打开

hello

here you are my friend, without a for loop

a=3;b=8;
Eg=[50 100 150 175 200 250 300];
Egm=mean(Eg);
P=[20 15 10 5 1 0.5 0.1];
m = length(Eg);
Ns = find(Eg>Egm);
Nb = find(Eg<Egm);
Nsb = (1:m);
Nsb(Ns) = [];
Nsb(Nb) = [];
Xs=(P(Ns)/a)-1;
Xb=(P(Nb)/b)-1;
Xsb=Eg(Nsb);

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Ancy S G 2022-3-29

Thank you for your valuable effort.

Sir,it's the same code.

Here Xs,Xb,Xsb in the above code,I just put it as X for all.

I want to stop this iterative process until the error between previous iterative value and new value converges nearly to zero.That is the value of X in this code.

My doubt is how to make this code as a iterative computation and the know the values of X after each iteration.

Mathieu NOE 2022-3-29

在 MATLAB Online 中打开

hello again

I am not sure to understand how you want to have the X by iteration

the previous code (see below) is based on conditional statements (if, else,...) and I don't see how you can replace that logic with an iteration on X

maybe you can help me clarify this point

a=3;b=8;
Eg=[50 100 150 175 200 250 300];
Egm=mean(Eg);
P=[20 15 10 5 1 0.5 0.1];
Ns = [];
Nb = [];
Nsb = [];
        
for ci=1:length(Eg)
    if Eg(ci)>Egm
        % output as Ns
        Ns = [Ns ci];
    elseif Eg(ci)<Egm
        % output as Nb
        Nb = [Nb ci];
    else
        %output as Nsb
        Nsb = [Nsb ci];
   end
end
Xs=(P(Ns)/a)-1;
Xb=(P(Nb)/b)-1;
Xsb=Eg(Nsb);