MATLAB: Filter table by character string entry

Question

Hello,

I have table T which contains string entries in the second column (named 'column_name').

Two questions:

1. How can I filter the table (or create a new table), so that only those rows are included whose 2nd column entry equals the filter parameter (e.g. 'FieldSlew1')?
2. How can I filter the table (or create a new table), so that only those rows are included whose 2nd column entry contain the filter parameter (e.g. 'FieldSlew')?

For information regarding formats:

When querying, I get the following results

>> T(1, 2)

ans =

table

column_name

____________

'FieldSlew1'

I have tried using "for" loops, but this takes forever.

Thank you for advice,

Dan

Answer 1

Hi Dan,

try this method out.

%create random table
t1 = [1,2,3,4]';
t2 = {'Hei','boo','Hei','boo'}';
tbl = table();
tbl.t1 = t1;
tbl.t2 = t2;
% Convert to categorical, as i presume this is reoccuring values
tbl.t2 = categorical(tbl.t2)
% index rows with the correct variables in column
idx = tbl.t2 == 'boo';
% create table based on index
newtbl = tbl(idx,:);