How to get the row numbers from a chart.

We have a chart to work on, which has over 20000 rows. We want to get the row numbers for the rows which have values over 200.

we used

for i = 1:numel (num(;,3))

if num(i;3) >= 200

end

end

what code should we add in the blank row.

Thank you.

[Pavan Guntha]

Can you elaborate on what is chart being referred to in the question ?

Answer 1

[SSM]

If I understand your question correctly, then you don't need to write a loop to get the row numbers.

Instead, use find() function.

Example:

%%% Sample data
A = 400*rand(1,100)'; % This creates a column with 100 values randomly distributed between 0 to 400.
%%% Need to find row numbers of data greater than 200
rows = find(A > 200); % Returns the row numbers of values greater than 200.
%%% If you want the values greater than 200 in another variable
B = A(rows); % Returns all the values of A gretaer than 200 as a new variable B