ITM448_WEEK4

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California State University, Long Beach *

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4278

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Computer Science

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Jan 9, 2024

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CHRISTOPHER CONSUL 09/15/2022 ITM 448 18:00-21:00 ITM448 Homework – Week 4 Edit your submission in this word document, attaching the screenshots of the codes used for each question. Include narrative descriptions, outputs screenshot, or short answers when requested. Task 1 Please generate a vector of the following values: 12,32,33,44 and assign this vector to a variable x. Then output the first element and the last element from this vector
Task 2 Following the previous question, please square each number of the vector, and name the new vector “y”.
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Task 3 Given the following character vector x = c( "hayward" , "fremont" , "union city" , "san jose" , "castro valley" ), generate another vector named “y” showing the number of characters in each string in x. Your result look like the following:
Task 4 Suppose we have two lists: lst1 = list( c ( 1 , 2 , 3 ), "dog" ), and lst2 = lst( TRUE , NULL , c ( 'good' , 'bad' )) Please concatenate the two lists together and name the new list lst3. Then please describe what is the difference between the following two expressions: (1) lst3[1]; and (2) lst3[[1]]. The difference between the two expressions is that lst3 are the displays the concatenated elements within the single brackets of [] or double brackets [[]]. The single bracket returned a lists of two [[1]] [[1]] because it needs to return the sequential of both [[1]] to get [1] 1 2 3 in order to display the exact name, type, and value of [[1]] . However, with lst3[[1]], it displays only [[1]] [1] 1 2 3 because it returns the exact list since it is the exact name, type, and value .
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