Effacer les filtres
Effacer les filtres

how to extract specific numbers from string?

3 vues (au cours des 30 derniers jours)
Lilya
Lilya le 12 Mar 2020
Réponse apportée : Luna le 12 Mar 2020
Hi all- I have to access the file name (MERRA2_100.tavg1_2d_slv_Nx.19800101.nc4.nc4) to be able to read the data.
Accordingly, I've created the following code to do that. But the problem is the determination of the substring location (in bold) as it should be varied due to the multiple numbers of files I have. So what I need is to determine the location of the day and month in 19800101.
any help would be appreciated.
for i=1:length(all_files)
fname=all_files(i).name;
tmp = split(fname,'.');
mdate = tmp(3);
mdate = str2double(mdate);
year = round(mdate/10000);
month = round((mdate - (year*10000)));
mm = round(month/100);
dd = round(month - mm*100);
if (dd == iday) && (mm == imon);
filelist(j) = strcat(all_files(i).folder,'/' ,fname);
j = j + 1;
end
end

Réponse acceptée

Luna
Luna le 12 Mar 2020
Hello Lola,
You can convert to datetime object and use the properties like below:
mdate = '19800101';
tmp_date = datetime(mdate,'Format','uuuuMMdd');
Day = tmp_date.Day;
Month = tmp_date.Month;
Year = tmp_date.Year;
I recommend not to use year, month, day as variables they are already built-in functions in Matlab.

Plus de réponses (0)

Catégories

En savoir plus sur Data Type Conversion dans Help Center et File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by