Should Behavior of sub2ind() be Different for Symbolic and Numeric Inputs?

maxrows = 1; r = 1; a = 1; c = 1; ii = false;
D = zeros(3,3,maxrows) % D is a double

D = 3×3

0 0 0 0 0 0 0 0 0

D(sub2ind([3,3,maxrows],a(ii),a(ii),r(ii))) = c(ii)

D = 3×3

0 0 0 0 0 0 0 0 0

D = zeros(3,3,maxrows,'sym')  % now D is a sym

D = 

D(sub2ind([3,3,maxrows],a(ii),a(ii),r(ii))) = c(ii)

D = 

Why does sub2ind() change the dimension of D in the latter case?

[Paul]

Fixed in 2022a

maxrows = 1; r = 1; a = 1; c = 1; ii = false;
D = zeros(3,3,maxrows) % D is a double

D = 3×3

0 0 0 0 0 0 0 0 0

D(sub2ind([3,3,maxrows],a(ii),a(ii),r(ii))) = c(ii)

D = 3×3

0 0 0 0 0 0 0 0 0

D = zeros(3,3,maxrows,'sym')  % now D is a sym

D = 

D(sub2ind([3,3,maxrows],a(ii),a(ii),r(ii))) = c(ii)

D = 

Answer 1

[Divija Aleti]

Hi Paul,

The development team is working on resolving this issue. A task has been created for our development team about the bug report.

Thank you for your understanding and you will definitely be notified once the this issue is resolved.

Regards,

Divija