Function reference
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          accu()
- forecast accuracy
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          crossjoin()
- table cross join
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          date_to_yyyymmdd()
- Convert date string to YYYY-MM-DD format
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          exampleDataR
- Sales data for two locations
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          fast.date()
- fast date conversion
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          faster_date()
- faster date conversion
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          gcQuiet()
- gc without printed message
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          lsos()
- list variables and size
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          maR()
- moving average of a column
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          readparquetR()
- reading parquet or delta files from local directory or aws s3 or azure blob
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          read_csv_azure()
- read csv files from azure blob
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          uniquen()
- count unique values in a table
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          week_start()
- find latest sunday
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          write_to_blob()
- write_to_blob
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          write_to_S3()
- save your files to Amazon S3 with "tryCatch" capability