HOW TO USE RANDOM?

there are two formulas

K1 + K2 + K3 =1 (1)

K1 > K2 > K3 (2)

I need 100 random combinations of the K1, K2 and K3

how can I do in the MATLAB

[KSSV]

What is the range of K1,K2,K3? You must specify the limit and type of numbers.

[Kaiser]

quotient

for example, K1=0.549 K2=0.351 k3= 0.1

[KSSV]

So you want Ki's between 0 and 1 ? They have to satisfy both the conditions?

[Kaiser]

yes

0<Ki's<1

They must satisfy both the conditions!

[KSSV]

Modified my answer..

[Kaiser]

haha because that is true.

You are right!

Do you know how to do in Matlab?

[KSSV]

I have answered it. Check the answer.

[Kaiser]

Thank you very much!

[KSSV]

You have to accept the answer, if it is useful to you. That is thanking in mathworks.

Answer 1

[KSSV]

N = 100 ;
k = linspace(0,1,N) ;
[K1,K2,K3] = ndgrid(k,k,k) ;

thesum = K1+K2+K3 ;

idx = thesum==1 ;
K1 = K1(idx) ; K2 = K2(idx) ; K3 = K3(idx) ;
K = [K1 K2 K3] ;
idx = K1<K2 & K2<K3 ;
iwant = K(idx,:) ;

[Kaiser]

Can you tell me what is the meaning of the"idx"?

If I want to declare K1 = 0.5? Can I only change the "K1=K1(idx)" to "K1=0.5" ?

[KSSV]

idx gives the indices of the elements in the array/ matrices satisfying given condition.

[Kaiser]

Okay, I see~!

second~

If I want to declare K1 = 0.5? Can I only change the "K1=K1(idx)" to "K1=0.5" ?