Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>To get the file ID, use regular expressions, e.g.:</p> <pre><code>filename = 'Processed_0123456_1'; file_id_str = regexprep(filename, 'Processed_(\d+)_\d+', '$1'); file_num_str = regexprep(filename, 'Processed_\d+_(\d+)', '$1') </code></pre> <p>To read in the file contents, assuming that it's all comma-separated values without a header, use textscan, e.g.,</p> <pre><code>fid = fopen(filename) C = textscan(fid, '%f,%f,%f') % Use as many %f specifiers as you have entries per line in the file </code></pre> <p>textscan also works on strings. So, for example, if your file contents was:</p> <pre><code>filestr = sprintf('1, 2, 3\n1, 3, 3') </code></pre> <p>Then running textscan on <code>filestr</code> works like this:</p> <pre><code>C = textscan(filestr, '%f,%f,%f') C = [2x1 int32] [2x1 int32] [2x1 int32] </code></pre> <p>You can convert that to a matrix using cell2mat:</p> <pre><code>cell2mat(C) ans = 1 2 3 1 3 3 </code></pre> <p>You could then repeat this procedure for all files with the same ID and concatenate them into a single matrix, e.g.,</p> <pre><code>C_full = []; for (all files with the same ID) C = do_all_the_above_stuff; C_full = [C_full; C]; end </code></pre> <p>Then you can look for what you want in <code>C_full</code>.</p> <p><strong>Update based on updated OP Dec 12, 2013</strong></p> <p>Here's code to read the values from a single file. Wrap this all in the the loop that I mentioned above to loop over all your files and read them all into a single matrix.</p> <pre><code>fid = fopen('/path/to/file'); % Skip over 12 header lines for kk = 1:12 fgetl(fid); end % Read in values to a matrix C = textscan(fid, '%f,%f,%f'); C = cell2mat(C); </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POBest way to compare data from file to data in array in Matlab
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDaniel Golden
    1. USDaniel Golden
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POBest way to compare data from file to data in array in Matlab
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COI neglected to put this in the OP but the text file does have delimiters, how would I account for that? And does using C = .... multiple times update the value of C each time I re-assign it?
      singulars
      1. PO
      1. USImmortalxR
    2. COYou put the delimiters explicitly in the textscan format specifier line. In the line I gave you, `textscan(fid, '%f,%f,%f')`, it assumes that a comma is the delimiter. I believe that whitespace is ignored. And yes, every time you do `C = ...`, the old value of `C` is lost. That's why I concatenated onto a new matrix, `C_full`, in each iteration.
      singulars
      1. PO
      1. USDaniel Golden
    3. COI'm sorry I feel like an idiot I meant header lines for the input file, I understand the comma delimiters.
      singulars
      1. PO
      1. USImmortalxR
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload