Some convertesr can't reuse

[elda27]

The implementation of some converters can't reuse.
The example shows the following.

input1 = np.array([
    'Tom',
    'Becky',
    'Tom',
    'Becky',
    'Ann',
])
converter = prepnet.OrdinalConverter()
result = converter.encode(input1)
print(result) # Display text should be "[0, 1, 0, 1, 2]"

input2 = np.array([
    'Tom',
    'Tom',
    'Ann',
])
result = converter.encode(inputs)
print(result) # Display text should be "[0, 0, 2]" but actual "[0, 0, 1]"

[elda27]

List of the subject classes.

• OrdinalConverter
• OnehotConverter
• Standardize

Other classes will be added when I realize it.

[elda27]

almost fixed