Order and plot two linked vectors

Hi, I have two vectors in which all the elements of the vector called "rho" in the Matlab code corresponds exactly at the elements in the other vector called "h". I want to order the vector "rho" from the smallest value to the greatest one, but when I do that, Matlab linked, for example the first element (the smallest) of the reorderd "rho" with the first element of "h", but in my work this is not correct. I write you the code:

if true
  % num = 250;
delta_omega = 1/num;
h = 0.1+0.006:0.006:1.6
for i=1:length(h)
RXi=RX1 - h(i)*RX2
fx = (sort(RXi)')';
n = length(RXi);
p = ((1:n)/n)';
F=2.59
x=3.59
c=3.59
k=0.5
K = (F*exp(-x)*exp(-k*(F + c - x - (exp(F) - exp(x))/F)) - k*exp(-k*(F + c - x - (exp(F) - exp(x))/F)) - k^2*exp(-k*(F + c - x))*(F*exp(-x) - 1) - F*exp(-k*(F + c - x))*exp(-x) + 2*F*k*exp(-k*(F + c - x))*exp(-x) + F*k^2*exp(-x)*exp(-k*(F + c - x - (exp(F) - exp(x))/F))*(exp(x)/F - 1)^2 + 2*F*k*exp(-x)*exp(-k*(F + c - x - (exp(F) - exp(x))/F))*(exp(x)/F - 1))/(k*exp(-k*(F + c - x))*(F*exp(-x) - 1) + F*exp(-x)*exp(-k*(F + c - x - (exp(F) - exp(x))/F)) - F*exp(-k*(F + c - x))*exp(-x) + F*k*exp(-x)*exp(-k*(F + c - x - (exp(F) - exp(x))/F))*(exp(x)/F - 1));
phi=(K*exp(-K*p))/(1-exp(-K));

if true
  % code
rho=phi.*(RXi.*p)
rho1= -phi.*(RXi.*p)

 VX=[rho, h']
VX1=[rho1,h']
plot(h', rho)
plot(h',rho1)
end

How can I order the vectors together in order to have the correct correspondence of values? I remeber you that I want to order "rho" from the smallest value to the greatest one.

Answer 1

[Star Strider]

I would use the sortrows function.

From the documentation:

• B = sortrows(A,column) sorts matrix A based on the columns specified in the vector, column. This input is used to perform multiple column sorts in succession.

Try this:

Vxs = sortrows(Vx, 1);

and see if that does what you want.

[Star Strider]

PIERLUIGI PEDERZOLI’s ‘Answer’ moved here:

Yes I have a the correct order into the matrix! Thank you..but now I have to plot that in a chart with on the x axis h, and in the y axis rho..

[Star Strider]

You simply have to ‘split’ the ‘Vx’ matrix column-wise:

figure(1)
plot(Vx(:,2), Vx(:,1))
grid

However, note that this is sorted by Vx(:,1), not Vx(:,2), so you need to be aware of that.

[PIERLUIGI PEDERZOLI]

Ok..thank you very much!

[Star Strider]

My pleasure!

If my Answer solved your problem, please Accept it.

Answer 2

[Ortinomax]

Another simple way is to use indice in the second output of the sort function.

[rho_sorted order]= sort(rho);
h_rho=h(order);

[rho1_sorted order]= sort(rho1);
  h_rho1=h(order);

Then you can plot vectors.