Want to run the code for n values of X0, tried using for loop but didn,t get desired output.how to run for n values of X0?

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vaishali 2014-6-11

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https://ww2.mathworks.cn/matlabcentral/answers/133767-want-to-run-the-code-for-n-values-of-x0-tried-using-for-loop-but-didn-t-get-desired-output-how-to

评论： Geoff Hayes 2014-6-11

if true
 X = [ 0, 15 30 45 ];
 Y = [50, 8.5, 2, 0.5];
 X0 = 0; 
 n = 100; 
 f = 0.1; 
x = linspace(min(X),max(X),n); 
y = interp1(X,Y,x,'spline'); 
xt = X0+(0.1*(max(X)-min(X))*[-1 0 1]);
m = diff(y)./diff(x);
m = [m, m(end)]; 
k = min([find(x >= X0,1,'first'), length(x)]);

yt = y(k) + m(k)*(0.1*(max(X)-min(X))*[-1 0 1]);

plot(X,Y,'ro', x,y,'-b',xt,yt,'--g');

 % code
  end

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Geoff Hayes 2014-6-11

What do you want the n values for X0 to be? The first is zero, the second one is… What should this sequence be?

vaishali 2014-6-11

编辑：vaishali 2014-6-11

X0=0:10

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采纳的回答

Geoff Hayes 2014-6-11

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https://ww2.mathworks.cn/matlabcentral/answers/133767-want-to-run-the-code-for-n-values-of-x0-tried-using-for-loop-but-didn-t-get-desired-output-how-to#answer_140480

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If X0 varies from 0 to 10 (and we assume a step size of 1), then a for loop could be introduced as follows

 X0data = 0:1:10;
 for i=1:length(X0data)
     X0 = X0data(i);
     X = [ 0, 15 30 45 ];
     Y = [50, 8.5, 2, 0.5];
     % etc.
     plot(X,Y,'ro', x,y,'-b',xt,yt,'--g');
     hold on;  % to allow multiple plots on same figure
 end