Vigenere cipher - be like Sherlock Holmes!
You're a young detective. Every detective needs a function to decrypt a vigenère cipher. It's a modification of a caesar cipher....
5年弱 前
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Change Vector Value
Change the element of the vector with respect to the element of the direction vector
If the element of the direction vecto...
5年弱 前
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Reshape a Vector
Write a function that accept three inputs. The first one is a row vector S. The
second and third arguments are m and n which de...
5年弱 前
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average for three points
how to calculate the average (for each three values of y)
y=[2 3 5 3 4 2 3 4 5 3 2 7 8 6 5 5 4 3 3 3 2 ]
you ...
Sum of elements of a vector (★★★)
Given any vector x = [x1, x2, x3, ... xn], compute the sum of its elements.
Thus, if x = [ 1 3 -2 5 ], then the sum of its el...
5年弱 前
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Matrix convolution
A certain convolution step involves an elementwise multipication between two 3x3 matrices and taking the resulting sum of the el...
5年弱 前
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Create logarithmically spaced values (★)
Given three numbers a,b,n with b>a, create a vector y with n logarithmic spaced values between 10^a and 10^b.
Thus, if a = -2, ...
Element-wise vector product (★)
Given two vectors x and y, compute their element-wise product z.
Thus, if x = [1 3 5] and y = [0.5 -1 2], then
z = [1*0.5...
5年弱 前
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*Prime number check 2 (in construction)
Another way to see if a number is prime is to count the number of factors. For example,
the number 4 has 2 factors, [ 2 4 ]...
Make a checkerboard matrix (★★★★★)
(copy of Prob. 4)
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1...
5年弱 前
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Vector raised to a power, element-wise (★)
Given a vector A and a number x, raise each element of the vector to the power of x. Thus, if A = [2 5 7 1] and x = 0.5, then
...
Stacking vectors into a matrix
Given a 4x1 vector a, and a 2x2 matrix b, create a matrix M in which the first 2 rows are each identical to a and the last two r...