How to check the inputs of a user given vector

The following is the function I am trying to build. If a user doesnt give any information it work, however I am trying to have it so that when the user enters an arbitrary 1x4 vector of ones and zeros, the corresponding information is pulled. Not everything is shown in this code only the parts I think are pertinent to this question.

function fetchRINEX(days2get, startUTC, GNSSflag)

% Simple script to retrive GPS, GALILEO, BEIDOU, and GLONASS RINEX based navigation data files.

% GNSSflag = [GPSflag Galileoflag beidouflag glonassflag]

% flag = 1 Retrieve that data

if nargin==0

days2get = 1;

end

if nargin<2

startUTC = fix(clock);

end

if nargin<3

GNSSflag = [0 0 0 0];

GNSS = {'GPS','GALILEO','GLONASS','BEIDOU'};

[indx,tf] = listdlg('ListString',GNSS);

end

%%%%%%%%% This is where I need help to check which column in the vector is a 1 and which is a zero and then execute the following code with respect to the 1's %%%%%%%%%%%%%%%%%%%%%%%

for i=1:days2get

if sum(indx==1)>0 % If GPS is selected from the selection box, the following code will be executed.

% Build the directory string for GPS

dirStr = sprintf('/gnss/data/daily/2020/%03d/20n/', doy(i));

fileStr = sprintf('brdc%03d0.20n.Z', doy(i)); % Note this does not work for data set prior to 2000

cd(ftpobj, dirStr);

mget(ftpobj, fileStr, '.');

end

if sum(indx==2)>0 % If GALILEO is selected from the selection box, the following code will be executed.

% Build the directory string for GALILEO

dirStr = sprintf('/gnss/data/daily/2020/%03d/20l/', doy(i));

fileStr = sprintf('glps%03d0.20l.Z', doy(i)); % Note this does not work for data set prior to 2000

cd(ftpobj, dirStr);

mget(ftpobj, fileStr, '.');

end

if sum(indx==3)>0 % If GLONASS is selected from the selection box, the following code will be executed.

% Build the directory string for GLONASS

dirStr = sprintf('/gnss/data/daily/2020/%03d/20g/', doy(i));

fileStr = sprintf('brdc%03d0.20g.Z', doy(i)); % Note this does not work for data set prior to 2000

cd(ftpobj, dirStr);

mget(ftpobj, fileStr, '.');

end

Answer 1

[Sayyed Ahmad]

I hope I understand your problem. Try this

a=[0 0 1 1];
idx=find(a==1)

the answer would be:

idx =

3 4