MATLAB: Creating Line graphs and Surface Plot

graphlinesurfacex axis

Hi Everyone

I will be very grateful if anyone can help me create a line graph and also a surface plot using the attached tables. I will like the x-axis to be Abilities and y-axis to be total score and then make the graphs grouping by (Naive C or Naive D).

Best Answer

[num,txt,raw] = xlsread('Graph Data.csv') ;
x = num(:,1) ;
y = num(:,2) ;
figure
plot(x,y,'.r')
xi = unique(x) ; 
X = reshape(x,length(x)/length(xi),[]) ;
Y = reshape(y,length(x)/length(xi),[]) ;
figure
surf(X,Y,Y)

Related Solutions

MATLAB: How to create contour

"the data belongs to only three different randomly selected rows of the color cross section"

That was the missing bit of information. The values that you have been calling "Y" are really the result of measurements along lines, with the measurements not equally spaced, and one of the coordinates of the line given only implicitly, constants for any given "X" "Y" pair.

In the below code, I make the constant information into the x values, and assume the first pair is at x = 1, the second at x = 2, the third at x = 3. I then created scattered interpolants and sample them along a grid and contour the result.

num = csvread('contour.csv', 2);
N = ones(size(num,1),1);
D = [N, num(:,1), num(:,2); 2*N, num(:,4), num(:,5); 3*N, num(:,7), num(:,8)];
F = TriScatteredInterp(D(:,1),D(:,2),D(:,3));
[X,Y] = ndgrid(linspace(0,5,20),linspace(min(D(:,2)),max(D(:,2)),20));
Z = F(X,Y);
contour(X,Y,Z);

MATLAB: How to create cross-section from 3d dimensional surface

You define your required x values and the respective y values, use interpolation (interp2).

Read about interp2 .

Best Answer

Related Solutions

MATLAB: How to create contour

MATLAB: How to create cross-section from 3d dimensional surface

Related Question