Method: Daru::DataFrame#set_row_at

Defined in:
lib/daru/dataframe.rb

#set_row_at(positions, vector) ⇒ Object

Set rows by positions

Examples:

df = Daru::DataFrame.new({
  a: [1, 2, 3],
  b: ['a', 'b', 'c']
})
df.set_row_at [0, 1], ['x', 'x']
df
#=> #<Daru::DataFrame(3x2)>
#       a   b
#   0   x   x
#   1   x   x
#   2   3   c

Parameters:

  • positions (Array<Integer>) —

    positions of rows to set

Raises:



329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
 
# File 'lib/daru/dataframe.rb', line 329

def set_row_at positions, vector
  validate_positions(*positions, nrows)
  vector =
    if vector.is_a? Daru::Vector
      vector.reindex @vectors
    else
      Daru::Vector.new vector
    end

  raise SizeError, 'Vector length should match row length' if
    vector.size != @vectors.size

  @data.each_with_index do |vec, pos|
    vec.set_at(positions, vector.at(pos))
  end
  @index = @data[0].index
  set_size
end