How to do a reccurent substitution in a symbolic matrix in matlab withor the ''FOR'' loop?

Question

How to do a reccurent substitution in a symbolic matrix in matlab withor the ''FOR'' loop?

TEIF-RO (Mechanical)

(OP)

17 Jun 21 09:46

Hi
I have this symbolic 2x2 matrix in Matlab. z is A Symbolic variable
k(z)= [ z+1, z^2; exp(z), z^3].
I need a value of k(z) for z=1:N

How to do this without a loop '' FOR''

Thanks

GregLocock (Automotive) · Answer 1 · 2021-06-17 12:20:43

Obviously a homework question. you need to learn about the . modifier for arithmetical operations.
k =

2.0000 3.0000 4.0000 5.0000 6.0000 1.0000 4.0000 9.0000 16.0000 25.0000
2.7183 7.3891 20.0855 54.5982 148.4132 1.0000 8.0000 27.0000 64.0000 125.0000

for N=5. it's a 2 liner, no loops.

Cheers

Greg Locock

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TEIF-RO (Mechanical) · Answer 2 · 2021-06-17 18:08:50

@Greg Locock
Honestly I did not get what you said
could you please give me the Matlab code you used to get your answer?
My problem here is not the answer but how to get k for each value of Z without the loop.
Kindly send me the code
Thanks
TEIF

newbie_user (Mechanical) · Answer 3 · 2021-06-24 11:55:04

Avoid using only "FOR" or any other loops at all? You can organize, for example, through "WHILE" ...

clc
clear
z=0
while z<10
z=z+1
k = [ z+1, z^2; exp(z), z^3]
kk(z,1)={k};
end

GregLocock (Automotive) · Answer 4 · 2021-06-24 12:22:15

Think of all the bytes you are killing
z=1:10;
k=[z+1,z.^2;exp(z),z.^3]

Cheers

Greg Locock

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How to do a reccurent substitution in a symbolic matrix in matlab withor the ''FOR'' loop?