text: var vows = require('vows');
  var assert = require('assert');
  var suite = vows.describe('jStat');
  
  require('../env.js');
  
  suite.addBatch({
    'linearalgebra': {
      'topic': function() {
        return jStat;
      },
      'subtracting a matrix works': function(jStat) {
        var A = jStat([[1, 2, 3]]);
        var B = [[4, 5, -6]];
        assert.deepEqual(A.subtract(B), jStat([[-3, -3, 9]]));
      },
      'subtracting a scalar works': function(jStat) {
        var A = jStat([[1, 2, 3]]);
        assert.deepEqual(A.subtract(100), jStat([[-99, -98, -97]]));
      }
    }
  });
  
  suite.export(module);
  