Integration of a matrix

Hi does anyone know how I would perform this integration:

This is the code I have so far but I'm not sure how to properly perform this integral> I am reading data in from an excel file and would like to sum the integration results?

clc 
close all 
clear all
    % Load data from excel
    Ts=xlsread('E:\NPL\Cav400H\c1.csv','A3:A1002');
    A=xlsread('E:\NPL\Cav400H\c1.csv','A3:B1002');
    plot(A(:,1),A(:,2))
    % Sampling frequency 
    Fs = 1/(max(Ts)-min(Ts)); 
    L = 10000;
    FT = fft(A(:,2),L);
    FT = FT(1:L/2)/L; 
    % RMS Value (v(f)V*(f))
    FAmp = abs(FT.*conj(FT));
    % BIE Limits 
    Fmin = 1e6; % minimum integral limit
    Fmax = 5e6; % maximum integral limit