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مدل ARIMA
«میانگین متحرک خودهمبسته یکپارچه» (Autoregressive Integrated Moving Average | ARIMA) ابزاری مهم در تحلیل «سری‌های زمانی» (Time Series) به منظور پیش‌بینی قیمت‌های آینده یک متغیر بر اساس مقدار کنونی آن به شمار می‌آید. هدف ARIMA شناسایی ماهیت روابط بین باقیمانده‌ها است که مدلی با درجه خاصی از قدرت پیش‌بینی را فراهم می‌کند.

در مثال این پست، یک مدل ARIMA بر اساس داده های شرکت گوگل از سال 2018 تا پایان 2020 اجرا شده است.

#سری_زمانی
#آریما
#پایتون_مالی
#time_series
#Arima

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مدل ARIMA
«میانگین متحرک خودهمبسته یکپارچه» (Autoregressive Integrated Moving Average | ARIMA) ابزاری مهم در تحلیل «سری‌های زمانی» (Time Series) به منظور پیش‌بینی قیمت‌های آینده یک متغیر بر اساس مقدار کنونی آن به شمار می‌آید. هدف ARIMA شناسایی ماهیت روابط بین باقیمانده‌ها است که مدلی با درجه خاصی از قدرت پیش‌بینی را فراهم می‌کند.

در مثال این پست، یک مدل ARIMA بر اساس داده های شرکت گوگل از سال 2018 تا پایان 2020 اجرا شده است.

#سری_زمانی
#آریما
#پایتون_مالی
#time_series
#Arima

@python4finance

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How Does Bitcoin Work?

Bitcoin is built on a distributed digital record called a blockchain. As the name implies, blockchain is a linked body of data, made up of units called blocks that contain information about each and every transaction, including date and time, total value, buyer and seller, and a unique identifying code for each exchange. Entries are strung together in chronological order, creating a digital chain of blocks. “Once a block is added to the blockchain, it becomes accessible to anyone who wishes to view it, acting as a public ledger of cryptocurrency transactions,” says Stacey Harris, consultant for Pelicoin, a network of cryptocurrency ATMs. Blockchain is decentralized, which means it’s not controlled by any one organization. “It’s like a Google Doc that anyone can work on,” says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. “Nobody owns it, but anyone who has a link can contribute to it. And as different people update it, your copy also gets updated.”

The lead from Wall Street offers little clarity as the major averages opened lower on Friday and then bounced back and forth across the unchanged line, finally finishing mixed and little changed.The Dow added 33.18 points or 0.10 percent to finish at 34,798.00, while the NASDAQ eased 4.54 points or 0.03 percent to close at 15,047.70 and the S&P 500 rose 6.50 points or 0.15 percent to end at 4,455.48. For the week, the Dow rose 0.6 percent, the NASDAQ added 0.1 percent and the S&P gained 0.5 percent.The lackluster performance on Wall Street came on uncertainty about the outlook for the markets following recent volatility.

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