how to solve the Datenum failed error

I've been trying to run a matlab code which uses datenum ,

fid=fopen('./stationeventinfo_1.dat','r');
tab_evt=textscan(fid,'%f%f%f%f%f%f');
fclose(fid);
n_d=length(tab_evt{1});


for ie=1:n_d
data_yr(ie)=tab_evt(ie,1);
data_mo(ie)=tab_evt(ie,2);
data_dy(ie)=tab_evt(ie,3);
data_hr(ie)=tab_evt(ie,4);
data_min(ie)=tab_evt(ie,5);
data_sec(ie)=tab_evt(ie,6);

 data_time=datenum(data_yr(ie),data_mo(ie),data_dy(ie),...
        data_hr(ie),data_min(ie),data_sec(ie));
 
end

where file stationeventinfo_1.dat is given as (i have more input line like this in this file)

1998 09 28 14 07 44 

I keep getting this error which i cannot figure out how to resolve,

Error using datenum (line 190)
DATENUM failed.

Error in datecheck (line 24)
 data_time=datenum(data_yr(ie),data_mo(ie),data_dy(ie),...

Caused by:
    Error using datenummx
    
    The datenummx function only accepts double arrays.

Please help :)

Answer 1

[Walter Roberson]

textscan() returns a cell array with one entry per column. Using () indexing to a cell array will get you a cell array in return.

data_yr(ie)=tab_evt{1}(ie);

Note: you are overwriting all of data_time every iteration of your loop.

You do not need any loop there are at all.

data_time = datenum(cell2mat(tab_evt));

We do not recommend datenum these days; datetime objects are typically much more convenient.

[Rashni Anandawansha]

Thank you :)

[Peter Perkins]

Strongly recommend you heed Walter's advice about using datetime; I would also add that you should use readtable or readmatrix and not textscan.