How to integrate dataset over a certain domain ?
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Sumit Saha
el 22 de Abr. de 2021
Comentada: Star Strider
el 23 de Abr. de 2021
clear all
close all
clc
load data.txt
S_v = data(:,2);
T = data (:,1);
I_H = trapz(S_v); %Spectral_Intensity
Here it integrates over the whole domain. But how can I integrate within the specified range ?
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Star Strider
el 22 de Abr. de 2021
Perhaps:
load data.txt
S_v = data(:,2);
T = data (:,1);
Trange = (T >= 0.1) & (T <= 2.5);
I_H = trapz(T(Trange), S_v(Trange)); %Spectral_Intensity
will do what you want. (Not able to test it without ‘data.txt’.)
Do not use clear or clc. It is simply inefficient.
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Star Strider
el 23 de Abr. de 2021
As always, my pleasure!
With vectors or arrays, the trapz funciton is the only option. The other integration functions require function handle arguments, and integrate the functions themselves between specific limits.
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