How to plot hexagonal boundary graph

Hello, I am currently studying on plotting the graph. And I am trying to plot hexagonal graph shown in the attachment.

However when I extracted the results into txt file and put in the matlab, the results was shown like following attachment

file = readtable('wignertxt_111_5e20.xlsx');

x=table2array(file(:,1));

y=table2array(file(:,2));

z=table2array(file(:,3));

kA = reshape(x,379,7);

kB = reshape(y,379,7);

T = reshape(z,379,7);

%[X,Y,Z] = meshgrid(kA,kB,T);

%shading interp;

surf(kA, kB, T)

view(2)

the below Excel file is the txt file from the 1st picture attachment.

Can anyone please help me with this issues?

It would be a great help.

Thank you for reading.

Answer 1

[Kyoung Moon Lee]

In order to create a contour graph in matlab, we need to convert to nXn data instead of 1xn.

clc; clear; close all;

% option control
op.resolution = 1000;

% read data
data = readmatrix('wignertxt_111_5e20.xlsx');
x = data(:,1);
y = data(:,2);
z = data(:,3);

% make grid
x1 = linspace(min(x),max(x),op.resolution);
y1 = linspace(min(y),max(y),op.resolution);

% interpolation
[x2,y2] = meshgrid(x1,y1);
z2 = griddata(x,y,z,x2,y2);

% figure
contourf(x2,y2,z2,'LineStyle','none')
colorbar

[changmin lim]

Thank you very much!