hello guys.this is my code.x2 and y2 are the experimental data while pt and y12 are the theoritical fittings.y2 has 10 values while y12 has 450 points.i need to take the 10 points from theoritical on the same pt as experimental

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waqas muhammad 2018-1-18

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https://ww2.mathworks.cn/matlabcentral/answers/377694-hello-guys-this-is-my-code-x2-and-y2-are-the-experimental-data-while-pt-and-y12-are-the-theoritical

回答： waqas muhammad 2018-1-18

采纳的回答： KSSV

Auximinuscode.m

code

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Answer 1

KSSV 2018-1-18

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https://ww2.mathworks.cn/matlabcentral/answers/377694-hello-guys-this-is-my-code-x2-and-y2-are-the-experimental-data-while-pt-and-y12-are-the-theoritical#answer_300627

在 MATLAB Online 中打开

Simple, you may use interpolation to get what you want.

%%Get 10 points from theoritical on the same pt as experimental
x2i = x2 ;
y2i = interp1(pt,y12,x2i) ;

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waqas muhammad 2018-1-18

[9}VXWQF1EADT[5`)}M9XBD.png

thanks sir...it works but there is another problem...if i plot experimental/theoritical,it also give me results but if i plot then plot is not correct...the plot should be like this but it is not...

KSSV 2018-1-18

Why it is not like that?

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Answer 2

waqas muhammad 2018-1-18

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https://ww2.mathworks.cn/matlabcentral/answers/377694-hello-guys-this-is-my-code-x2-and-y2-are-the-experimental-data-while-pt-and-y12-are-the-theoritical#answer_300634

QQ??20180118124451.jpg

x2i = x2 ; y2i = interp1(pt,y12,x2i) ; kafa=y2./y2i plot(x2,kafa) sir like this..right?i divide that experimental by theoritical points and then plot it with pt.... but it give me plot like this...