Question about extracting rows from a table based on string

Hello everyone

I wanted to store all winter ("Win") values of the rrr24 column in my data set in a new array

So I tried to do it like:

C_Winter = temp(strcmp((temp.seasons,'Win'),rrr24));

But this error appears,

 C_Winter = temp(strcmp((temp.seasons,'Win'),rrr24));
                                            ↑
Error: Invalid expression. When calling a function or indexing a variable,
use parentheses. Otherwise, check for mismatched delimiters.

I tried some other ways but all of them leads to error. Do you know what should I do?

Thank you.

[Stephen]

"Do you know what should I do?"

Match the parentheses:

temp(strcmp((temp.seasons,'Win'),rrr24))
%   0      12                  2      10

Why are you including the column rrr24 index inside of the strcmp function call?

I don't see anything like that shown in the strcmp documentation or the table indexing documentation:

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-table.html

[BN]

Thank you, I deleted extra columns and change it to:

t = strcmp(temp.season,'Win');

now it resulted a logical vector, i tried to use it as index:

temp (t)

But error:

Subscripting into a table using one subscript (as in t(i)) or three or more
subscripts (as in t(i,j,k)) is not supported. Always specify a row
subscript and a variable subscript, as in t(rows,vars).

Stop me.

Do you know how can I do? Thanks

[BN]

Thank you I just found it:

t = temp(strcmp(temp.season,'Win'),:);

[dpb]

The above is all columns, you said you wanted the one variable...alternatively, remove the string from the 'seasons' variable...

temp.seasons=categorical(temp.seasons);         % convert to categorical variable type
C_Winter=temp.rrr24(temp.seasons=='Win');       % pick winter seasons from rrr24 array

[BN]

Thank you