KOBORI Takehiko

Active since 2012

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Programming Languages:
C
Spoken Languages:
Japanese

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Is My Wife Wrong?
Answer the question. (see also <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right Problem 149: Is my ...

mer än 9 år ago

Solved

Matlab Basics - Logical Tests I
Write a script to test whether a year number is for a leap year or not. eg. x = 1884 output = 1 eg. x = 3 output = 0

mer än 9 år ago

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Matlab Basics II - squares
Write a function that takes matrix A, and squares each element in the matrix example: A = [1 2 3] output = [1 4 9]

mer än 9 år ago

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calculate RMS voltage
given peak to peak voltage, calculate rms voltage

mer än 9 år ago

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Divide by 4
Given the variable x as your input, divide it by four and put the result in y.

mer än 9 år ago

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find the roots of a quadratic equation
for e.g x = [ 2 -1 -3] y = [1.5 -1]

mer än 9 år ago

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calculate linear convolution two vectors
for e.g in: a = [1 2 3] b = [4 5 6] out: y = [4 13 28 27 18]

mer än 9 år ago

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Are you in XY plane?
Take a point P as an input position Vector (x,y,z). If you are in XY plane, return 1 as an output otherwise return 0. Example...

mer än 9 år ago

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Max index of 3D array
Given a three dimensional array M(m,n,p) write a code that finds the three coordinates x,y,z of the Maximum value. Example ...

mer än 9 år ago

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Hard limit function
Classify x data as if x>=0 then y=1 if x<0 then y=0 Example x = [ -2 -1 0 1 2] y = [ 0 0 1 1 1]

mer än 9 år ago

Solved

Sum the 'edge' values of a matrix
Sum the 'edge' values of an input matrix (the values along the perimeter). Example [1 2 3 4 5 6 7 8 9] Output = ...

mer än 9 år ago

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Frobenius Norm
Write your own version of Frobenius Norm without using the 'norm' function.

mer än 9 år ago

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Determine the mean of matrix
Determine the mean of matrix without using mean function Hint: use simple algorithm

mer än 9 år ago

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Matlab Basics II - Minimum
Write a function that returns the minimum of each ROW of a matrix x example: x = [1 2 3; 4 5 6]; output [1;4];

mer än 9 år ago

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multiply by three
Given the variable x as your input, multiply it by 3 and put the result equal to y. Examples: Input x = 2 Output y is ...

mer än 9 år ago

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Symmetric matrix
You must create a n-by-n *symmetric* matrix such that A(row,col) = row/col for col >= row. Example if n =3 : output is : ...

mer än 9 år ago

Solved

Project Euler: Problem 4, Palindromic numbers
A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 ...

mer än 9 år ago

Solved

Cody Computer Part 4 : Are you a morning Cody player Addicted ?
This is a stupid Cody challenge. You just have to *click "Submit" between 7 and 9 AM.* ... Greenwich Mean Time (GMT). To see ...

mer än 9 år ago

Solved

Moving average (variable kernel length)
Find the moving average in a vector. The kernel length is a variable. For example x = 1:10 kernel_length = 2 would r...

mer än 9 år ago

Solved

Palindrome Check
Check whether the entire matrix is palindrome or not. Example matrix = [7 8 7] matrix_reverse = [7 8 7] So the mat...

mer än 9 år ago

Solved

Next Lower Power of B
Given a number _n_ and a base _B_ greater than 1, return the lowest integer power of _B_ that is less than or equal to _n_. E...

mer än 9 år ago

Solved

Text processing - Help Johnny write a letter home from camp
Johnny overuses the word 'great'. Write a script that will help him with this and future letters. If a sentence contains more ...

mer än 9 år ago

Solved

Upper triangular matrix
Create a function to retrieve the upper triangular matrix of a matrix (without using tril). The matrix will always be square. ...

mer än 9 år ago

Solved

Integer or Float?
Test an input to see whether it is an integer or a floating point number. If it is an integer return 1 for 'true'. Otherwise ret...

mer än 9 år ago

Solved

Signed Magnitude
For a given input vector, return the value that is furthest from zero. For example, if x = [1 2 -12] return -12.

mer än 9 år ago

Solved

String substitution, sub problem to cryptoMath
This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

mer än 9 år ago

Solved

Volume of a box
Given a box with a length a, width b, and height c. Solve the volume of the box.

mer än 9 år ago

Solved

Saving MATLAB session to a file
How to save MATLAB session to a file?

mer än 9 år ago

Solved

edge detection
write a function that gives the indexes of rising or falling edge x is a vector (assume it contains always at least one eleme...

mer än 9 år ago

Solved

Tiling a matrix
Given a matrix and a number of columns, replicate matrix in a single row

mer än 9 år ago