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Lära Challenge: Matrix Row Means | Apply Family Functions in R
Control Flow in R

bookChallenge: Matrix Row Means

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You are given three different data objects: a matrix of student scores, a list of monthly sales for stores, and a vector of product prices.

  • Use the apply function to find the highest score for each student (each row in the matrix).
  • Use the lapply function to calculate the total sales for each store in the sales_list.
  • Use the sapply function to round each price in prices to the nearest integer, and store the result in a variable called rounded_prices.

Store your results in variables named:

  • student_highest_scores for the highest scores per student;
  • store_total_sales for the total sales per store;
  • rounded_prices for the rounded product prices.

Lösning

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 2
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bookChallenge: Matrix Row Means

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Uppgift

Swipe to start coding

You are given three different data objects: a matrix of student scores, a list of monthly sales for stores, and a vector of product prices.

  • Use the apply function to find the highest score for each student (each row in the matrix).
  • Use the lapply function to calculate the total sales for each store in the sales_list.
  • Use the sapply function to round each price in prices to the nearest integer, and store the result in a variable called rounded_prices.

Store your results in variables named:

  • student_highest_scores for the highest scores per student;
  • store_total_sales for the total sales per store;
  • rounded_prices for the rounded product prices.

Lösning

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Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 3. Kapitel 2
single

single

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