making map in matlab

if true
  % code
end
I have longitude,latitude and rainfall like that
77.245  31.465  427.94
77.195  31.465  427.92
77.145  31.465  427.79
77.095  31.465  428.06
77.045  31.465  428.23
76.995  31.465  267.87
76.945  31.465  268.11
76.895  31.465  268.18
77.445  31.515  311.14
77.395  31.515  314.24
77.345  31.515  312.6
77.295  31.515  312.42
77.245  31.515  326.54
77.195  31.515  325.4
77.145  31.515  312.24
77.095  31.515  320.51
77.045  31.515  339.76
76.995  31.515  408.82
76.945  31.515  409.66
76.895  31.515  578.72
76.845  31.515  578.37
76.795  31.515  578.15
76.495  31.515  100.37
76.445  31.515  383.13
77.545  31.565  1035.7
77.495  31.565  93.819
77.445  31.565  305.56
77.395  31.565  308.28
77.345  31.565  312.08
77.295  31.565  312.76
77.245  31.565  311.08
77.195  31.565  310.44
77.145  31.565  312.58
77.095  31.565  322.01
77.045  31.565  343.49
76.995  31.565  409.37
76.945  31.565  410.05
76.895  31.565  579.17
76.845  31.565  578.51
76.795  31.565  578.49
76.595  31.565  579.08
76.545  31.565  148.36
76.495  31.565  100.34
76.445  31.565  100.36
76.395  31.565  383.23

There are 555 values.According to one latitude longitude are changing.The third column is rainfall.I have to create a map of rainfall from this in matlab. How it is possible.

[KSSV]

You said 555 values, is the data given above complete? If not attach it as a text file.

[Tanmoyee Bhattacharya]

Sir I attach a full length file of 555 values.

Answer 1

[Chad Greene]

It looks like your data already conform to an evenly-spaced grid, even though they're columnated. That's good, because it means using scatteredInterpolant is overkill. I'd use xyz2grid, which is easier to code, computationally more efficient, and does not make up any data. Let's call the matrix you posted A:

A = [77.245  31.465  427.94
     77.195  31.465  427.92
     77.145  31.465  427.79
       .          .      .
       .          .      .
       .          .      .
     76.395  31.565  383.23]; 

[lon,lat,rainfall] = xyz2grid(A(:,1),A(:,2),A(:,3)); 
pcolor(lon,lat,rainfall) 
shading flat 
borders('countries')

That last line is optional, it's just a way to plot national borders with a function found on File Exchange.

[Tanmoyee Bhattacharya]

Sir me using matlab 2015.It is telling Undefined function or variable 'xyz2grid'.

[Tanmoyee Bhattacharya]

Sir It's so helpful.Image is coming perfectly.

[Chad Greene]

Great, I'm glad it's working.

Answer 2

[Andrei Bobrov]

use scatteredInterpolant:

Let X - your data - array [555 x 3]

F = scatteredInterpolant(X(:,1),X(:,2),X(:,3));
a = min(X(:,1:2));
b = max(X(:,1:2));
[ii,jj] = ndgrid(linspace(a(1),b(1),1000), linspace(a(2),b(2),1000));

out = F(ii,jj);