B Z@sldZdZdZeZdZdZdZdZddlm Z m Z m Z dd l m Zdd lmZmZd d Zd dZddZdS)zStack loss dataZrestructuredtextzThis is public domain. zw Brownlee, K. A. (1965), "Statistical Theory and Methodology in Science and Engineering", 2nd edition, New York:Wiley. z(Stack loss plant data of Brownlee (1965)zThe stack loss plant data of Brownlee (1965) contains 21 days of measurements from a plant's oxidation of ammonia to nitric acid. The nitric oxide pollutants are captured in an absorption tower.a:: Number of Observations - 21 Number of Variables - 4 Variable name definitions:: STACKLOSS - 10 times the percentage of ammonia going into the plant that escapes from the absoroption column AIRFLOW - Rate of operation of the plant WATERTEMP - Cooling water temperature in the absorption tower ACIDCONC - Acid concentration of circulating acid minus 50 times 10. ) recfromtxt column_stackarray)utils)dirnameabspathcCst}tj|dtdS)z Load the stack loss data and returns a Dataset class instance. Returns -------- Dataset instance: See DATASET_PROPOSAL.txt for more information. r) endog_idxdtype) _get_dataduZprocess_recarrayfloat)datarBlib/python3.7/site-packages/statsmodels/datasets/stackloss/data.pyload%s rcCst}tj|dtdS)z Load the stack loss data and returns a Dataset class instance. Returns -------- Dataset instance: See DATASET_PROPOSAL.txt for more information. r)rr )r r Zprocess_recarray_pandasr )r rrr load_pandas1s rc Cs:ttt}t|dd}t|ddtd}WdQRX|S)Nz/stackloss.csvrb,T)Z delimiternamesr )rr__file__openrr )filepathfr rrrr =s  r N)__doc__Z __docformat__Z COPYRIGHTZTITLEZSOURCEZ DESCRSHORTZ DESCRLONGZNOTEZnumpyrrrZstatsmodels.datasetsrr os.pathrrrrr rrrrs