<p>Fix the issue mentioned in <a href="https://github.com/mlpack/mlpack/issues/658" class="issue-link js-issue-link" data-url="https://github.com/mlpack/mlpack/issues/658" data-id="157401712" data-error-text="Failed to load issue title" data-permission-text="Issue title is private">#658</a></p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>&nbsp;&nbsp;<a href='https://github.com/mlpack/mlpack/pull/660'>https://github.com/mlpack/mlpack/pull/660</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>1 : fixing issue #658, work with non-transpose data, do not work with</li>
  <li>remove useless codes</li>
  <li>use algorithm to replace for loop</li>
  <li>fix bug--isdigit will not treat 1.004e10 as digit</li>
  <li>support transpose mapping</li>
  <li>fix format--place const before variable</li>
  <li>fix bugs--may read invalid stream</li>
  <li>remove debug message</li>
  <li>reduce copy</li>
  <li>add new test cases</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/mlpack/mlpack/pull/660/files#diff-0">src/mlpack/core/data/load_impl.hpp</a>
    (173)
  </li>
  <li>
    <strong>M</strong>
    <a href="https://github.com/mlpack/mlpack/pull/660/files#diff-1">src/mlpack/tests/load_save_test.cpp</a>
    (272)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/mlpack/mlpack/pull/660.patch'>https://github.com/mlpack/mlpack/pull/660.patch</a></li>
  <li><a href='https://github.com/mlpack/mlpack/pull/660.diff'>https://github.com/mlpack/mlpack/pull/660.diff</a></li>
</ul>

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