How can I produce a Heat/Contour map of energy distribution within a vessel

Hi, I have these excel files that contain data obtained from an oscilloscope. This data is in the time domain I have converted it to the time domain using the following code:

    clc 
    close all 
    clear all
% Load data from excel
Ts=xlsread('D:\NPL\Cav400H\c1.csv','A3:A1002');
A=xlsread('D:\NPL\Cav400H\c1.csv','A3:B1002');
% Sampling frequency 
Fs = 1/(Ts(2)-Ts(1)); 
% L = length(Ts);
L = 10000;
FT = fft(A(:,2),L);
FT = FT(1:L/2)/L; 
% RMS Value
FAmp = abs(FT.*conj(FT)); 
% Frequency axis
FBase = ((0:(L/2)-1)/(L/2)) * (Fs/ 2); 
% BIE Limits 
Fmin = 1e6; % minimum integral limit
Fmax = 5e6; % maximum integra limit
Flim = 5e6; % plotting limit
% Temporary values 
[tmp FminTemp]=min(abs(FBase-Fmin));
[tmp FmaxTemp]=min(abs(FBase-Fmax));
[tmp FlimTemp]=min(abs(FBase-Flim));
% Calculate the RMS value of the siganl in dB
dBV = 10*log10(FAmp); 
% Plot the signal in frequency domain
figure;
plot(FBase(1:FlimTemp), dBV(1:FlimTemp));
grid on;
xlabel('Frequency, [Hz]');
ylabel('Amplitude, [dB]');

I am using a technique called the broadband energy technique to calculate the strength of the energy:

Df = FBase(2) - FBase(1); 
energy = sum(abs(FAmp(FminTemp:FmaxTemp))*Df);

How would I move on and create an 2D energy map like such:

The vessel dimensions are 410x160mm I have also attached one of the excel files (I have 27)

Thanks for the help in advance! Sorry if the question has been poorly laid out.

Answer 1

[Abraham Boayue]

% Start by making the following changes
Fs = 1/(max(Ts)-min(Ts));  % Your sampling frequency was infinite, change it to this line.

% You will need two sets of time axis to plot the 2D image shown, as an example,
% try these few lines in your code.

figure
h = dBV;
tt = 0:1/Fs:(length(dBV)-1)/Fs; 
tyc = 0:1/Fs:(length(dBV)-1)/Fs;
imagesc(tt, tyc, h)

[Abraham Boayue]

I hope these few lines will help you get the results that you are looking for. Good luck for now.

[Oliver Mashari]

Hi thanks for this. It helps but I'm still having problems. I would like to ask for more advice but I'm not even sure how I would start. But thanks again for your time!