How to do a baseline correction

Question

Faezeh Manesh 2019-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/482091-how-to-do-a-baseline-correction

评论： Hassan Nawazish 2020-6-29

Hello everyone,

I have an experimental data as shown in the figure, I need to do a baseline correction, in a way that the black line that I drew in the picture becomes horizental. Can any of you help me to do it in MATLAB?

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David Hill 2019-9-25

Looks like you know how exactly how the baseline needs to be adjusted. Just subtract the linear adjustment from your power array.

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Answer 1

Rik 2019-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/482091-how-to-do-a-baseline-correction#answer_393491

在 MATLAB Online 中打开

You mean like a simple subtraction?

t=linspace(0,10,100);
bias=@(t) t/9;
P_fun=@(t) 0.1*(t-3).^2+sin(t/2)-0.85 +bias(t);
P=P_fun(t);
%subtract bias
P_new=P-bias(t);
plot(t,P,'b',t,bias(t),'k',t,P_new,'r')