How to define variable that itself contains one or more variables ?

How can I find b(ijk) for different values of i,j,k by just entering values of i,j,k.

b(ijk) = d/dq(k) [m(ij)] q(1), q(2), q(3).......are variables

How can we define variable in a variable ( q(k) , m(ij) ) ?

[James Tursa]

Can you give more detail? What are the dimensions of d, dq, q, m? How do you want those combined to form b? Maybe give an example for one specific element of b.

[dpb]

Is a variable "in" a variable a cell array???

[Alish]

qk is a family of variables. Substituting different values of k we get different q ( example q1, q2, q3 etc )

[Alish]

Basically i want to define a family of equations bijk = d/dqk[mij]

where d/dqk is partial derivative wrt qk Now if i sustitute i=1 j =2 k=3 i get

b123=d/dq3[m12]

where q3 is a variable m12 is an element of a matrix

In the same way we can obtain b231, b212, b113 etc.

 So basically how can i define a family of variables qk which itself contains a variable k ?

[dpb]

See

doc function_handle % (@)

for perhaps a way to proceed.

Answer 1

[Jos (10584)]

You do not want to store things like Q1 = .. Q2 = .. .. Q98293 = .. in gazillion different, but related, variables

You want a single array Q, which can be an array of doubles, cells, structures.