Operators

polars_ta.ta.operators

通过import直接导入或更名的函数

from polars_ta.wq.arithmetic import add as ADD  # noqa
from polars_ta.wq.arithmetic import divide as DIV  # noqa
from polars_ta.wq.arithmetic import multiply as MUL  # noqa
from polars_ta.wq.arithmetic import subtract as SUB  # noqa
from polars_ta.wq.time_series import ts_max as MAX  # noqa
from polars_ta.wq.time_series import ts_min as MIN  # noqa
from polars_ta.wq.time_series import ts_sum as SUM  # noqa

Functions:

Name	Description
MAXINDEX	Notes
MININDEX	Examples

MAXINDEX(close: Expr, timeperiod: int = 30) -> Expr

Notes

Comparing to ts_arg_max this also marks the abs. position of the max value

与ts_arg_max的区别是，标记了每个区间最大值的绝对位置，可用来画图标记

Examples:

from polars_ta.ta import MAXINDEX as ta_MAXINDEX
from polars_ta.talib import MAXINDEX as talib_MAXINDEX
from polars_ta.wq import ts_arg_max

df = pl.DataFrame({
    'a': [6, 2, 8, 5, 9, 4],
}).with_columns(
    out1=ts_arg_max(pl.col('a'), 3),
    out2=ta_MAXINDEX(pl.col('a'), 3),
    out3=talib_MAXINDEX(pl.col('a'), 3),
)
shape: (6, 4)
┌─────┬──────┬──────┬──────┐
│ a   ┆ out1 ┆ out2 ┆ out3 │
│ --- ┆ ---  ┆ ---  ┆ ---  │
│ i64 ┆ u16  ┆ i64  ┆ i32  │
╞═════╪══════╪══════╪══════╡
│ 6   ┆ null ┆ null ┆ 0    │
│ 2   ┆ null ┆ null ┆ 0    │
│ 8   ┆ 0    ┆ 2    ┆ 2    │
│ 5   ┆ 1    ┆ 2    ┆ 2    │
│ 9   ┆ 0    ┆ 4    ┆ 4    │
│ 4   ┆ 1    ┆ 4    ┆ 4    │
└─────┴──────┴──────┴──────┘

MININDEX(close: Expr, timeperiod: int = 30) -> Expr

Examples:

from polars_ta.ta import MININDEX as ta_MININDEX
from polars_ta.talib import MININDEX as talib_MININDEX
from polars_ta.wq import ts_arg_min

df = pl.DataFrame({
    'a': [6, 2, 8, 5, 9, 4],

}).with_columns(
    out1=ts_arg_min(pl.col('a'), 3),
    out2=ta_MININDEX(pl.col('a'), 3),
    out3=talib_MININDEX(pl.col('a'), 3),
)
shape: (6, 4)
┌─────┬──────┬──────┬──────┐
│ a   ┆ out1 ┆ out2 ┆ out3 │
│ --- ┆ ---  ┆ ---  ┆ ---  │
│ i64 ┆ u16  ┆ i64  ┆ i32  │
╞═════╪══════╪══════╪══════╡
│ 6   ┆ null ┆ null ┆ 0    │
│ 2   ┆ null ┆ null ┆ 0    │
│ 8   ┆ 1    ┆ 1    ┆ 1    │
│ 5   ┆ 2    ┆ 1    ┆ 1    │
│ 9   ┆ 1    ┆ 3    ┆ 3    │
│ 4   ┆ 0    ┆ 5    ┆ 5    │
└─────┴──────┴──────┴──────┘