Antoine
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Fill a zeros matrix
The aim is to fill an array of all zeros given a numerical value and the index of row and columns for this value. 3 Inputs: ...
etwa 6 Jahre vor
Gelöst
Vectorize the digits of an Integer
Create a vector of length N for an integer of N digits. x=123045; x_vec=[1 2 3 0 4 5]; I happened upon a trick to do ...
fast 10 Jahre vor
Gelöst
sum of non-primes
The sum of the non-primes below 10 is 1+4+6+8+9+10=38 Find the sum of all the non-primes below the input, N.
fast 10 Jahre vor
Gelöst
Is it a number?
Determine if input is numeric. If it is,output is 1; if it is not, output is 0.
fast 10 Jahre vor
Gelöst
Find a subset that divides the vector into equal halves
Given a vector x, return the indices to elements that will sum to exactly half of the sum of all elements. Example: Inpu...
fast 10 Jahre vor
Gelöst
Back to basics 20 - singleton dimensions
Covering some basic topics I haven't seen elsewhere on Cody. Remove the singleton dimensions from the input variable (e.g. if...
fast 10 Jahre vor
Gelöst
Make a run-length companion vector
Given a vector x, return a vector r that indicates the run length of any value in x. Each element in r shows how many times the ...
fast 10 Jahre vor
Gelöst
How many trades represent all the profit?
Given a list of results from trades made: [1 3 -4 2 -1 2 3] We can add them up to see this series of trades made a profit ...
fast 10 Jahre vor
Gelöst
vectorization in N
For a given integer n (n>1), compute the sum f (i) (1 <= i <= n) where f (i) = 1 if n is odd and 2 otherwise.
fast 10 Jahre vor
Gelöst
Generate a NaN...on purpose
The goal is to create a function that will return a single "NaN" without using the nan function. I am interested to see how many...
fast 10 Jahre vor
Gelöst
Specific Element Count
Given a vector _v_ and a element _e_, return the number of occurrences of _e_ in _v_. Note: NaNs are equal and there may be n...
fast 10 Jahre vor
Gelöst
Determine the number of odd integers in a vector
Determine the number of unique odd integers in a vector. Examples: Input x = [2 5 8 3 7 1]; Output y = 4; Inp...
fast 10 Jahre vor
Gelöst
Number of toolboxes?
Return a number equal to the number of toolboxes available to the Cody solvers.
fast 10 Jahre vor
Gelöst
Return unique values without sorting
If the input vector A is [42 1 1], the output value B must be the unique values [42 1] The *values of B are in the s...
fast 10 Jahre vor
Gelöst
Who invented zero?
We know the importance zero in computer science, mathematics... but who invented zero? Clue: He was the first in the line ...
fast 10 Jahre vor
Gelöst
No Twins?
Write a function that accepts as input a vector and returns the same vector, but retaining only the first occurrence of an eleme...
fast 10 Jahre vor
Gelöst
Remainder
Make 'y' equal to the remainder of 27 divided by 5. When x=27 and t=5
fast 10 Jahre vor
Gelöst
Is the input divisible by 3?
Return true if the input is divisible by 3 and false if not.
fast 10 Jahre vor
Gelöst
Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).
fast 10 Jahre vor
Gelöst
Count up then down
Create a function that produces counting up from 0 up to n then down to 0 n=2 --> 0 1 2 1 0 n=3 --> ...
fast 10 Jahre vor
Gelöst
Insert zeros into vector
Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...
fast 10 Jahre vor
Gelöst
Number of digits in an integer
Specifies how many digits in a given integer. Example: in=100 ==> out=3
fast 10 Jahre vor
Gelöst
Which quadrant?
Given a complex number, output quadrant 'I' 'II' 'III' or 'IV' | II | I | ...
fast 10 Jahre vor
Gelöst
Logical operators: Flipping bits
The xor operator will toggle the bit if the bit is xored with 1. Ex: 1 XOR 0 = 1, 1 XOR 1 = 0. The xor operator will retain th...
fast 10 Jahre vor
Gelöst
Back to basics 17 - white space
Covering some basic topics I haven't seen elsewhere on Cody. Remove the trailing white spaces from the input variable
fast 10 Jahre vor
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Replace multiples of 5 with NaN
It is required to replace all values in a vector that are multiples of 5 with NaN. Example: input: x = [1 2 5 12 10 7] ...
fast 10 Jahre vor
Gelöst
Back to basics 26 - Keywords
Covering some basic topics I haven't seen elsewhere on Cody. Return a cell array of strings of all MATLAB keywords.
fast 10 Jahre vor
Gelöst
Logical operators and arrays: 3-input and truth table
Given 3 inputs (inputA, inputB, inputC), assign threeInputAnd with the truth table outcomes for a 3 variable logical-and operati...
fast 10 Jahre vor
