Matlab：绘制存储为一列的x，y，z值

Question

How should I accomplish this plotting task task in Matlab?

Thank you.

EDIT: What I am asking is how to plot in Matlab when the data are in one column as described in the link given above.

Regards,

ikel

Answer 1

You could reshape and transpose the matrix and extract the columns:

vec = [1 2 3 4 5 6 7 8 9 10 11 12]';
reshaped_mat = reshape(vec,3,[])';

reshaped_mat will end up looking like this:

 1     2     3
 4     5     6
 7     8     9
10    11    12

And you can extract the columns as follows:

x = reshaped_mat(:,1);
y = reshaped_mat(:,2);
z = reshaped_mat(:,3);

Answer 2

You can try something like this >

For example : A=[1 2 3; 4 5 6;7 8 9]

A' would be

     1     4     7
     2     5     8
     3     6     9

First take the transpose,

B = A'

And convert it into a single column,

B(:) would give

ans =

     1
     2
     3
     4
     5
     6
     7
     8
     9

Hope it helps

Answer 3

yet another option for the lazy user: given a vector v

 v = [1 2 3 4 5 6 7 8 9 10 11 12];

since we know the elements go like [x1,y1,z1,x2,y2,z2,...] , plotting x,y,z will probably require plot3 , so this is how it can be done directly:

 plot3(v(1:3:end),v(2:3:end),v(3:3:end)) 

where the entries are equivalent to

 x=v(1:3:end);
 y=v(2:3:end);
 z=v(3:3:end);