Programming in C
4th Edition
ISBN: 9780321776419
Author: Stephen G. Kochan
Publisher: Addison-Wesley
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Chapter 7, Problem 12E
A matrix M with i rows, j columns can be transposed into a matrix N having j rows and i columns by simply setting the value of Na,b equal to the value of Mb,a for all relevant values of a and b.
- a. Write a function t that takes as an argument a 4 × 5 matrix and a 5 × 4 matrix. Have the function transpose the 4 × 5 matrix and store the results in the 5 × 4 matrix. Also write a m routine to test the function.
- b. Using variable-length arrays, rewrite the t function developed in exercise 12a to take the number of rows and columns as arguments, and to transpose the matrix of the specified dimensions.
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C'ZT
Write a function that takes one input, a matrix X. Your function should modify X and return the modified version of X as an output. Assuming that X
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When m is equal to n, modified X should be the same as X.
When m is greater than n, the modified version of X should be m x m. New columns should be added to the right of the original columns of X, with
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R Programming - Rmarkdown:
1. Given two vectors x and y of equal length, in one line of code (in the function body), write a function find_max_logical() that will output a single logical vector that is TRUE at the indices where the maximum values in x and y are. For example, given the below vectors:
x <- c(Inf, 3, 2, 6, 99)
y <- c(12, 1, 0, 40, 5)
# You should return (without manually creating the vector with c()) c(TRUE, FALSE, FALSE, TRUE, FALSE)
# Noting that Inf and 40 are the max values of x and y respectively,
## at the 1st index of x and the 4th index of y.
Please test your functions on the following test inputs in your submission:
# test case 1: x = c(Inf, 3, 2, 6, 99), y = c(12, 1, 0, 40, 5)
# test case 2: x = 1:5, y = 1:5
# test case 3: x = c(1, 4, 9), y = c(1, 4, 2)
2. Write a program to take input a 4 X 4 matrix using a user defined function and
print the output as follows:
Input:
1
2
4
5
6.
7
1
3
4
5
6.
Output:
7
5
11
13
15
13
9
1
3
11
7
9
11
9.
The value of every jh column of any ith row of the 2d-array is added with
the value of next column of ith row.
If the jh column represents the last column of the 2-d array, add the jh
column's item with the value of first column (where j = 0) of the inputted
2-d array.
Chapter 7 Solutions
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