MATLAB: Generate 2D surface map using 3 parameters

generate 2d surface map using 3 parameters

Hi,

I want to plot 2D surface map using 3 vector parameters, e.g

x-axis is depth

y-axis is distance

and 3rd parameter is resistivity.

I have arrange the data into 3 columns x y resistivity.

Regards,

Perveiz

Best Answer

Read about pcolor, scatter

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MATLAB: Contour plot for given x,y,z


[num,txt,raw] = xlsread('Book1.xlsx') ; 
x = num(:,1) ; 
y = num(:,2) ; 
z = num(:,3) ; 
figure(1)
scatter(x,y,20,z,'filled') ; colorbar
%% Method 1 / Griddata
nx = 500 ; ny = 500 ;
[X,Y] = meshgrid(linspace(min(x),max(x),nx),linspace(min(y),max(y),ny)) ;
Z =griddata(x,y,z,X,Y) ;
figure(2)
contour(X,Y,Z) ;
figure(3)
pcolor(X,Y,Z)
shading interp 
%% Method 2 simple reshaping 
x = unique(x) ; nx = length(x) ;
y = unique(y) ; ny = length(y) ;
Z = reshape(z,ny,nx) ;
figure(4)
contour(x,y,Z)

MATLAB: Plot Sea Current in Time vs Depth

[num,txt,raw] = xlsread('current data') ;
depth = num(:,1) ; 
currents = num(:,2:end) ;
[nx,ny] = size(currents) ;
%%plot of currents vs depth 
figure
hold on
for i = 1:ny
    x = 1:12 ;
    y = currents(i,:) ;
    z = depth(i)*ones(size(x)) ;
    plot(x,y,'color',rand(1,3))
end

Best Answer

Related Solutions

MATLAB: Contour plot for given x,y,z

MATLAB: Plot Sea Current in Time vs Depth

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