题目
题目

COMM_V 205 101 102 103 2025W1 Breakout Group (BG) 9

多重下拉选择题

A little bit of an overview for the implicit coercion in Arithmetic Operations with Vectors: If the vector's data type does not fit in the arithmetic operation, R will coerce its data type similar to atomic values in the context of arithmetic operations. The order  logical --> integer --> double. Assume again that today's temperatures for the cities are given. However, suppose weather forecasts just changed. You were told that tomorrow's temperature in Canadian cities will be 2 degrees Celsius cooler than today. However, temperature in American cities will be 1 degree Celsius warmer than today. Note that we are only provided with either American or Canadian cities. What would be the tomorrow's temperature in Celsius in these cities? Complete the code below: today_temp_C - 2*(country [ Select ] = == != ! = "Canadian") + 1*(country [ Select ] = == != ! = "Canadian") You can only use logical comparison operators or arithmetic operators in each blank above. Assume that the formula above is correctly completed. Answer the following two questions regarding the data type of the segment of the the completed formula? What is the data type of the outcome of the expression in the second parenthesis when the blank there is correctly filled; That is (country XXX "Canadian") ? [ Select ] logical integer double character What is the data type of the outcome of the expression in the second term of the entire line of code when the blank there is correctly filled; That is 2*(country XXX "Canadian") ? [ Select ] logical integer double character Last two blanks are intended to show you how implicit coercion has taken place.

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思路分析
We need to examine the provided multiple-dropdowns question and reason through each part step by step, even though the answer options for the dropdowns are not listed here. First, restating the core setup: the code involves comparing country to the string "Canadian" in order to determine a change in temperature. The first blank expects a relational operator (one of ==, !=, etc.) that is used between country [Select] and "Canadian". According to the given answer, the chosen operator for the first blank is == and the second blank uses !=. These choices affect how the rest of the expression evaluates. Option analysis for the first blank (the operator between country [Select] and "Canadian"): - If the correct operator is ==, the expression (country == "Canadian") yields a logical value. It compares each element of country t......Login to view full explanation

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