Doug’s MATLAB Video Tutorials

March 3rd, 2009

18:44 UTC | Posted in Format: Video, Level: Advanced, Topic: Practical example | Permalink |

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7 Responses to “Read data from the web with URLREAD”

1. Daniel Armyr replied on March 4th, 2009 at 09:46 UTC :
   

   You are a big nerd.

   But the video was nice. Few lines of code for a large wow-factor.

2. dhull replied on March 4th, 2009 at 15:23 UTC :
   

   Daniel,

   Thanks for the kind words about the video.

   Doug

   PS. I prefer the term Geek! :)

3. Tim Davis replied on March 7th, 2009 at 22:38 UTC :
   

   URLREAD is great. It’s been a great help. I have a MATLAB interface to the UF Sparse Matrix Collection called UFget, which downloads matrices from the collection into the MATLAB workspace. I used to have a Java component to it, but now I can do it all in M, with URLREAD, and my code is now much simpler (and more robust).

4. Jim replied on March 10th, 2009 at 05:49 UTC :
   

   Can you post the code in a text file?

5. dhull replied on March 11th, 2009 at 13:57 UTC :
   

   Jim,

   Sorry, I though I did post it. Here it is.

   clear
   clc

   block = urlread(’http://manyeyes.alphaworks.ibm.com/manyeyes/datasets/us-zipcodes-with-city-state-fips-lat/versions/1.txt’);

   %%
   readData = textscan(block, ‘%n %n %s %s %n %n %n %n’, ‘delimiter’, char(9));

   statenum = readData{1};
   zip = readData{2};
   abrev = readData{3};
   city = readData{4};
   lat = readData{5};
   lon = readData{6};
   pop = readData{7};
   percent = readData{8};

   clear readData

   %%

   load usapolygon

   %%
   vi = (pop > 53130.23903);

   plot(uslon, uslat, -lat(vi), lon(vi), ‘.’)

   %%
   city{vi}

   -Doug

6. Russell replied on May 14th, 2009 at 16:35 UTC :
   

   This will be really handy as soon as Wolfram|Alpha is up and running!

7. dhull replied on May 14th, 2009 at 19:31 UTC :
   

   @Russell,

   I am not sure what you mean, how would they work together?

   Doug

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<pre class="code">
a = magic(3);
sum(a)
</pre>

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