How to plot with 'm' rows and 3 columns?

Hi Everyone,

Just a simple question; The data is look like below and I want to plot x(for only x>0.2) as a function of Y and time. Could you please help me?

 x     y     time
  0     15     1
  0.2   20     3
  0.3   25     4
  0.1   33     5
  0.6   90     6

Thanks,

Ara

Answer 1

[Wayne King]

You only have two values here above 0.2 so it's not going to be an interesting plot, but let the matrix be A

   A = [0     15     1
    0.2   20     3
    0.3   25     4
    0.1   33     5
    0.6   90     6 ];
  idx = find(A(:,1)>0.2);
  plot3(A(idx,3),A(idx,2),A(idx,1))

or

   scatter3(A(idx,3),A(idx,2),A(idx,1))

Or you can simply set the x-values below to 0.2 to NaN for plotting

A(A(:,1) <=0.2) = NaN;
scatter3(A(:,3),A(:,1),A(:,3))

[Ara]

Thanks for your help. Yes, this one is a sample of my data so it may not interesting to plot these columns as you said. Actually, I am dealing with excel data with 32 columns and 5337 rows. According to my data, when I plot as a 3D are not as clear as 2D. So I am wondering if I can find another way to plot it. And How can I read row corresponding to the row? Another question; 3, 2 and 1 represent as columns? plot3(A(idx,3),A(idx,2),A(idx,1))