# AI News, Automatic machine learning for data scientists

- On Thursday, August 2, 2018
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## Automatic machine learning for data scientists

Each call to JustML is charged based on the compute time required by the algorithm.

One credit corresponds to one second of compute time using a reference machine (2 cores at 2.5 GHz, 8 GB of RAM).

- On Thursday, August 2, 2018
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## Frequently Asked Questions

The selected machine learning pipeline is built and deployed on JustML computing infrastructure, so that it can be reused at any time to generate new predictions.

- On Thursday, August 2, 2018
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## Understand your bill for Microsoft Azure

To understand your Azure bill, compare your invoice with the detailed daily usage file and the cost management reports in the Azure portal.

To obtain a PDF of your invoice and a copy of your detailed daily usage file CSV download, see Get your Azure billing invoice and daily usage data.

For detailed terms and descriptions of your invoice and detailed daily usage file, see Understand terms on your Microsoft Azure invoice and Understand terms on your Microsoft Azure detailed usage.

For example, the billing cycle on the invoice is equivalent to the billing period shown in the detailed usage file.

To continue with the example from above, visit the Subscriptions page, select your subscription, and then choose Cost analysis.

External services (also known as Azure Marketplace orders) are provided by independent service vendors and are billed separately.

If you set up a credit card or a debit card as your payment method, the payment is charged automatically within 10 days after the billing period ends.

Each meter emits usage records which are then used by Azure in our cost metering system to calculate the bill.

For example, a single virtual machine created in Azure may have the following meters created to track its usage: Once the VM is created, each one of the meters above will begin emitting usage records.

Azure Marketplace charges are for resources that have been created by third party software vendors that are available for use via the Azure marketplace.

- On Thursday, August 2, 2018
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## An Introduction To Compound Interest

Compound interest occurs when the interest you earn on the principal amount of an investment (or loan) is added back to the principal –

Take a look at the following example: let’s say you put $100 in the bank, compounding annually at 10% with simple interest.

The difference now is that in the second year, the new principal would be $110 (the original $100 plus the $10 of interest earned in year one).

There are two key factors that can impact the amount of interest you receive on a compounding investment: the compounding frequency, and the number of periods the money is invested.

Compounding frequency refers to the number of times interest is calculated on a loan or an investment in a given year (or other unit of time).

Where: A

= The number of years the money is invested The Compound Interest Formula will return the future value of the investment, which is simply the sum of the principal and the compounded interest.

To solve only for compounded interest, use the formula below: Compounded interest = P (1 + r/n) (n*t) –

Example 1: Suppose you want to buy a boat in 5 years that costs $7,500, so you deposit $5,000 into a bank that is paying annual interest of 6.5%, compounded semi–annually.

Example 2: How much more interest will you have to pay on the following loan if the bank charges compounded interest as opposed to simple interest?

CI = P * (1 + r / n) (n*t) - P CI = $10,000 * (1 + .087 / 4) 4 * 3 - $10,000 CI = $2,946 Let’s compare this to simple interest: Simple Interest = P * (1 + r * t) –

Example 3: If you want to have $50,000 in 10 years, how much money do you have to invest today if your money is growing at 9%, compounding monthly?

= P * (1 + r / n) (n*t) $50,000 = P * (1 + .09 / 12) (12 * 10) $50,000 = P * (2.45) P

Example 4: If I invest $100 today in a bank, at a rate of 12% compounded annually, how long will it take for my money to double?

= P * (1 + r / n) (n*t) $200 (double $100) = $100 * (1 + .12 / 1) 1 * T $2 = 1.12T T

In order to determine the amount of time it will take to double your money, with a given compounding interest rate, simply divide the interest rate per period by the number 72.

For example, if you wanted to know how long it would take a $1,000 investment compounding at 8% annually to double, simply divide 72 / 8 = 9 years.

for extremely low interest rates, the number 69 is more appropriate, and for larger interest rates the number 75 is more applicable.

However, across the board, the number 72 will provide an extremely close approximation for quick calculations to help ballpark your answer on an exam.

1 Where n is the number of times per year your money is compounded, and r is the nominal rate (in decimal form).

Consider the following example: one bank offers you a 5% interest rate compounded weekly, while another bank offers you a 7% interest rate compounded semi-annually.

This is extremely useful because it will allow you to change the inputs (interest rates, compounding periods, number of years etc.) to recalculate an answer for different problems.

If you go and invest $100 today in a fund that offers 15% semi-annual compounding, by the time you return 50 years from now, that money will be worth $138,307.

- On Thursday, August 2, 2018
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## Request units in Azure Cosmos DB

This article uses generic terms like container to refer generically to a collection or graph and item to refer generically to a table, document, node, or entity.

When 1KB data with 100,000 records is used, the total storage is 100MB and not 100GB): If you replicate your database to more than one region, Azure Cosmos DB provides throughput isolation to ensure that request unit usage in one region doesn't affect request unit usage in another region.

For example, if you write data to one region and read data from another region, the request units that are used to perform the write operation in region A don't take away from the request units that are used for the read operation in region B.

A single request unit represents the processing capacity that's required to read (via self link or ID) a single 1-KB item that consists of 10 unique property values (excluding system properties).

For example, here's a table that shows how many request units to provision for items with three different sizes (1 KB, 4 KB, and 64 KB) and at two different performance levels (500 reads/second + 100 writes/second and 500 reads/second + 500 writes/second).

The calculator can help your estimate the request unit requirements for typical operations, including: The tool also includes support for estimating data storage needs based on the sample items that you provide.

One method for estimating the amount of reserved throughput required by your application is to record the request unit charge associated with running typical operations against a representative item that's used by your application.

For example, these are the steps you might take: Consider the following document, which is approximately 1 KB in size: The following table shows approximate request unit charges for typical operations on this item.

(The approximate request unit charge assumes that the account consistency level is set to Session and that all items are automatically indexed.) The following table shows approximate request unit charges for typical queries used in the application: With this information, you can estimate the request unit requirements for this application given the number of operations and queries that you expect per second: In this case, you expect an average throughput requirement of 1,275 RU/second.

If you have more than one client cumulatively operating above the request rate, the default retry behavior might be insufficient, and the client throws a DocumentClientException with status code 429 to the application.

- On Friday, January 18, 2019

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