Why will categorical not convert this cell string?

What is the difference between these two lines?

The first line works correctly. The second line is giving an error.

Caused by:

Error using cell

Conversion to cell from categorical is not possible.

It seems to be working in here.

piedmont_1025.BurnCondition(:,1) = categorical({'Wild'});
piedmont_1025.FuelType(:,1) = categorical({'Piedmont'});

[Poison Idea fan]

Restarting matlab got rid of the issue though I am not sure what caused it.

Answer 1

[Sean de Wolski]

The left-hand side was a cell. So it successfully converted the right-hand side to categorical but then could not stick the categorical in as a cell on the left hand side.

c = cell(2,1)

c = 2×1 cell array
    {0×0 double}
    {0×0 double}

c(1,1) = categorical({'hello'})

Unable to perform assignment because value of type 'categorical' is not convertible to 'cell'.

Caused by:
Error using cell
Conversion to cell from categorical is not possible.

[Poison Idea fan]

I see. Thanks for clarifying.