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webread not working for JSON

조회 수: 7 (최근 30일)
Leah
Leah 2014년 12월 28일
댓글: Leah 2014년 12월 30일
I can read from url's and api's just fine as long as the return format is not JSON. Some examples from matlab help that don't work for me
>> api = 'http://climatedataapi.worldbank.org/climateweb/rest/v1/';
url = [api 'country/cru/tas/year/USA'];
S = webread(url)
S =
Empty matrix: 0-by-1
But this works just fine:
fullURL = ['http://www.mathworks.com/matlabcentral/fileexchange' ...
'?term=urlread'];
str = urlread(fullURL);
>> whos str
Name Size Bytes Class Attributes
str 1x82552 165104 char
Has anyone else had this issue? It use to work just fine for me a few months ago. I wonder if it is some internet setting issue.
  댓글 수: 2
Geoff Hayes
Geoff Hayes 2014년 12월 29일
Leah - looking at the example at webread, have you tried to include the options parameter? What happens when you try
options = weboptions('ContentType','text');
data = webread(url,options);
where url is what you have described in your question?
And, what happens if you navigate (in any web browser) to the URL http://climatedataapi.worldbank.org/climateweb/rest/v1/country/cru/tas/year/USA? Do you see the alternating year data from 1901 to 2011?
Leah
Leah 2014년 12월 30일
Thanks for your response Geoff. This magically started working and I haven't been able to reproduce the problem.

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