How to create contour maps in MATLAB?

Hello

I have a question about a code

I would like to create contour maps in matlab with kriging method. I use meshgrid and griddata commands to create contour maps, but the above commands use triangulation method. I would like to use kriging method?

Is there a way to make it? Could you please help me?

Answer 1

[Sulaymon Eshkabilov]

Hi,

Here is a nice matlab code for kriging method based interpolation.

https://www.mathworks.com/matlabcentral/fileexchange/57133-kriging-x-y-z-range-sill

Good luck.

[Ivan Mich]

ok and how could I plot this map? which command should I use?

[Ivan Mich]

How to plot the contours that created from this command?

Could you please help me?

[Sulaymon Eshkabilov]

Note that kriging method is a different meshing method that differs from MATLAB's meshgrid and is applicable for landscape mapping.

Once you get x, y, z computed, then you just use contour().

[Ivan Mich]

My code is

clc
clear

filename1= 'data.csv'

[d1,tex]= xlsread(filename1);

VAL =d1(:,1);
lat=d1(:,2); 
lon=d1(:,3); 
[elevation,gridX,gridY] = kriging(lon,lat,VAL)

contour(([elevation,gridX,gridY]))

and command window shows me :

Error using horzcat

Dimensions of arrays being concatenated are not consistent.

Error in Untitled (line 35)

contour(([elevation,gridX,gridY]))

elevation is 200X200 double

gridX 1x 200 double

gridY 1x 200 double

Where am I wrong?

[Sulaymon Eshkabilov]

You've made a small err. You should use this command:

contour(gridX, gridY, elevation)