otp.Operation.float.str

str(length=10, precision=6)

Converts float to str.

Converts number to string with given length and precision. The specified length should be greater than or equal to the part of the number before the decimal point plus the number’s sign (if any).

If length is specified as an int, the method will return strings with length characters, if length is specified as a column, the method will return string default (64 characters) length.

Parameters

• length (Operation or int) – Length of the string.

• precision (Operation or int) – Number of symbols after dot.

Returns

result – String representation of float value.

Return type

Operation

Examples

>>> data = otp.Ticks(X=[1, 2.17, 10.31861, 3.141593, otp.nan, otp.inf, -otp.inf])
>>> data["Y"] = data["X"].float.str(15, 3)
>>> otp.run(data)
                     Time          X       Y
0 2003-12-01 00:00:00.000   1.000000   1.000
1 2003-12-01 00:00:00.001   2.170000   2.170
2 2003-12-01 00:00:00.002  10.318610  10.319
3 2003-12-01 00:00:00.003   3.141593   3.142
4 2003-12-01 00:00:00.004        NaN     nan
5 2003-12-01 00:00:00.005        inf     inf
6 2003-12-01 00:00:00.006       -inf    -inf

Parameters length and precision can also be taken from the columns:

>>> data = otp.Ticks(X=[1, 2.17, 10.31841, 3.141593],
...                  LENGTH=[2, 3, 4, 5],
...                  PRECISION=[5, 5, 3, 3])
>>> data["Y"] = data["X"].float.str(data["LENGTH"], data["PRECISION"])
>>> otp.run(data)
                     Time          X  LENGTH  PRECISION      Y
0 2003-12-01 00:00:00.000   1.000000       2          5      1
1 2003-12-01 00:00:00.001   2.170000       3          5    2.2
2 2003-12-01 00:00:00.002  10.318410       4          3   10.3
3 2003-12-01 00:00:00.003   3.141593       5          3  3.142