Hox to interplolate Griddata and set colormaps interval

Hello,

I'm trying to analyze hardness mesaurement where i get three vector x,y and h

and I want to plot a map from these data (file attached) and choosing the colormaps interval.

I'am trying with this code

%% Read data

M = readmatrix('E_2022_11Cr_ODS_03.csv');

%% Get data from csv file

x1 = M(:, 1);

y1 = M(:, 2);

d1 = M(:, 3);

%% plot hardness maps

%Create regular grid across data space

n=100;

[X,Y] = meshgrid(linspace(min(x1),max(x1), n), linspace(min(y1),max(y1)), n);

g1 = griddata (x1,y1,d1, X,Y, 'cubic');

c1 = contourf(X,Y,g1 )

But i have a bad interpltation compared to map given by the hardness machine (see figures below)

Could any one helop me with these please

map with matlab

thanks in advanced

Answer 1

[Morten Sparre Andersen]

Your map looks fine. You see more less the features as in the plot designed by the machine.

if you use functions: image or imagesc you would get images without contours resambling the map by the machine.

You change the color map with a function: colormap, and you can get a color bar with the function colorbar.

good luck

----

When you have some free time use "help graphics" in the command window to get a list of a lot of nice graphics functions. I'm sure you wil find wonderfull fnctionalities that you can't wait trying out.

[Mohamed]

thanks for answer, but i belive it's a problem on the interploation

I try to remove the ligne and change the colorbar but always not a goo interpolation