code: def pos1pca(arr, axis=0, **kwargs):
      """Return basis vectors and projections with first row positive"""
      res = pca(arr, axis, **kwargs)
      return res2pos1(res)
  
imports: import numpy
  import pytest
  from nipy.io.api import load_image
  from nipy.testing import assert_almost_equal, assert_array_almost_equal, funcfile
  from ..pca import pca
label_desc: Use image node_id 4 for calling a global function with example usage: pos1pca(arr, axis) and returns: res2pos1