How to extract the fourth place of decimal of a number which is basically a flag-status?

I have a multicolumn datafile where the last coloun presents numbers like 3.2341, 2.3450, 1.2320, 8.9871. The fourth place of decimal is always either 1 or 0. If it is 1, it represents a certain flag to be 'ON', otherwise, it is 'OFF'. How to extract this flag information from these numbers?

Answer 1

[Guillaume]

Read your datafile however you want (using textscan, or csvread, or dlmread, or readtable) into a matrix. For example,

m = cell2mat(textscan(fid, '%f %f %f %f')); %or whatever the format is

Multiply the last column of your matrix by 10000, round it just to be sure, and take the modulo with 2 and you get your flag:

m = [1 2 3 3.2341; 4 5 6 2.3450; 7 8 9 1.2320; 10 11 12 8.9871]; %for example
flag = mod(round(m(:, end) * 1e4), 2)

[TP Das]

I eventually solved this by converting the number to string.

[Guillaume]

That's fine if speed is not critical. Converting to string is going to be a lot slower than just multiplication and modulo.