How to skip years with no data when reading the data from a website

Question

Salma fathi 2022-10-30

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1839343-how-to-skip-years-with-no-data-when-reading-the-data-from-a-website

评论： Salma fathi 2022-10-31

采纳的回答： Chris

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I am trying to read some data from a website in the following manner:

we have multiple stations to read data from and for each station we need to read the data from 2007 to 2022, but some stations they do not have data for this whole period of time, so we need to make our code able to skip these years with no data. it might be staright forward to do but I dont seem to know how to implement it, Here is what I started doing

F = "https://lgdc.uml.edu/common/DIDBGetValues?ursiCode=%s&charName=foF2,foF1,foE,foEs,hmF2,hmF1,hmE" + ...
    "&DMUF=3000&fromDate=%04d%%2F01%%2F01+00%%3A00%%3A00&toDate=%04d%%2F12%%2F31+11%%3A59%%3A00";
stnName=["JI91J" "NV355" "MO155" "KS759" "MA560" "TZ362" "YA462" "GA762" "EI764" "CO764" "SH266" "ZH466" "SMJ67" "NO369" "TR169" "NDA81"];
strY=2007; %the starting year
EndY=2022 ; % the ending year 
numOfYears=(EndY-strY)+1; 
for qq=1:legth(stnName)   %this loop is to go through the stations 
for kk=1:numOfYears  %this loop is to go through the years 
    
jj=kk+strY-1;   
fid = sprintf(F, jj,jj);
data = webread(fid); 
if length(data)==303  %this when the website will have no data to show 
    %here I have the issue on if the website had no data for a certain year
    %then we go to the next year and check.
jj=jj+1;
fid = sprintf(F,stnName{qq}, jj,jj);
data = webread(fid); 
else    %This is the desired way of reading the data for us
C = textscan(data, '%{uuuu-MM-dd''T''HH:mm:ss.SSS''Z}D %s %s %*s %s %*s %s %*s %s %*s %s %*s %s %*s %s %*s', 'Whitespace',' ' , 'CommentStyle' , '#');
 T= table(C{:});
end 
end
end 
% many thanks in advance, 