MATLAB: SurfC with 4 vectors

surfsurfcvectorvectors

Hello, Quick question : is it possible to make surfc works with vectors ? I have 4 vectors (x,y,z & c for the color) of the same length (1 point per quadruple xyzc ) but I don't understand how to turn them into matrix as surfc asks me. The xyz points are uniformly spaced. Any idea ?

Best Answer

Use reshape function, or interpolate the data:

http://www.mathworks.com/help/techdoc/ref/triscatteredinterp.html

Related Solutions

MATLAB: I have 3 columns of numerical data and I want to plot a surface. How to do this? I am willing to send the file and code. If I could get a coded response, I would be elated! Thanks.

clc; clear all ;
[num,txt,raw] = xlsread('ScaleData.xlsx');
x = num(:,1) ; 
y = num(:,2) ;
z = num(:,3) ;
X = reshape(x,[],3) ;
Y = reshape(y,[],3) ;
Z = reshape(z,[],3) ;
surf(X,Y,Z) ; 
shading interp ;

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)

Best Answer

Related Solutions

MATLAB: I have 3 columns of numerical data and I want to plot a surface. How to do this? I am willing to send the file and code. If I could get a coded response, I would be elated! Thanks.

MATLAB: Contour plot for given x,y,z

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