Help with table variables calculation

Hi,

I have a

table 'T'

with a column variable named 'rank', which includes categorical numbers: from 1 to 3.

I want to check if the 'rank' numbers are below or equal to 2. I do that with this:

i12 = (str2num(char(T.rank)) <= 2);

I need help with the following:

If i12 is True, then I want to reassign the rank to be '2'.

So, in the end, I have the variable 'rank' going from 2 to 3.

[Rik]

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Answer 1

[Clay Swackhamer]

% Define the table
T = table;
T.rank = [1,3,2,4,2,5,1,3,2,4]';
T.rank = categorical(T.rank);

% Create another column to store the 2s
T.updatedRank = 2*ones(height(T),1);
T.updatedRank = categorical(T.updatedRank);

% Find values <= 2
ix = str2num(char(T.rank)) <= 2; % True for rank 1 and 2

% Replace values
T.rank(ix) = T.updatedRank(ix)

% Get rid of updated rank column (optional)
% T.updatedRank = [];