The dimensions of the matrix are inconsistent when using the PDEToolbox

I'm using the PDEToolbox to deal with bioheat transfer problem, where the expression for Q is

Where r/ z / t are variables.

But when I enter the expression, the system prompts that the dimensions of the matrix are inconsistent.

Please tell me，how can I solve this problem？

Answer 1

[Prabhan Purwar]

Hi,

The following error states that there is a dimension mismatch problem while performing the arithmetics. Please make sure that the matrices are of correct dimensions.

Kindly have a look at following links for more insights:

• https://www.mathworks.com/help/pde/pde-problem-setup.html?s_tid=CRUX_lftnav
• https://www.mathworks.com/help/matlab/math/partial-differential-equations.html#:~:text=The%20MATLAB%C2%AE%20PDE%20solver,change%20with%20respect%20to%20time.

Thanks