How to select a specified value into a matrix using readtable

hi everyone, i'm using readtable function to get data from excel in this way:

matrix = readtable('sala_prove.xls');

now i have to select a specified row, for example

row = matrix(4,:);

at this point i should to select again a specified value, for example the first one of the row that i have just selected:

row(1)

but it doesn't work. there's an error message "You can not subscript a table using only one subscript. Table subscripting requires both row and variable subscripts." what does it mean? how can i resolve to select the first (or anyother) value in the row?

Answer 1

[Walter Roberson]

row = matrix(4,:); selects a single row, but the result is still a table. You can use

row = matrix{4,:};

to extract the values.

[Daniele Morello]

oh thanks, it can be a solution. but if i need the entire row using

row = matrix(4,:)

and then explore this table (isn't now an array?), how can i extract the values?