279 total contributions since 2016

i just like matlab

Solved

Get the elements of diagonal and antidiagonal for any m-by-n matrix

In the problem <http://www.mathworks.com/matlabcentral/cody/problems/858-permute-diagonal-and-antidiagonal Problem 858. Permute ...

bijna 3 jaar ago

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intersection of matrices

Given two matrices filled with ones and zeros, determine if they share a common row, column entry. These matrices are of identi...

bijna 3 jaar ago

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"Low : High - Low : High - Turn around " -- Create a subindices vector

Let two vectors *lo* and *hi* be given. The job is to create a index vector like so idx = [lo(1):hi(1) lo(2):hi(2) ...]...

bijna 3 jaar ago

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Getting the indices from a matrice

Getting the indices from a matrice. Inspired by Problem 645. Getting the indices from a vector by the great Doug Hull. Given a...

bijna 3 jaar ago

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We love vectorized solutions. Problem 1 : remove the row average.

Given a 2-d matrix, remove the row average from each row. Your solution MUST be vectorized. The solution will be tested for ac...

bijna 3 jaar ago

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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: ...

bijna 3 jaar ago

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Remove the two elements next to NaN value

The aim is to *remove the two elements next to NaN values* inside a vector. For example: x = [6 10 5 8 9 NaN 23 9 7 3 21 ...

bijna 3 jaar ago

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Reindex a vector

You are given two vectors of equal length. Vector N has numeric values (no Inf or NaN) while vector IDX has integers. Place th...

bijna 3 jaar ago

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middleAsColumn: Return all but first and last element as a column vector

Given input A, return all but the first and last elements, arranged as a column vector. (I.e., all dimensions after the first s...

bijna 3 jaar ago

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First non-zero element in each column

For a given matrix, calculate the index of the first non-zero element in each column. Assuming a column with all elements zero ...

bijna 3 jaar ago

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Generate N equally spaced intervals between -L and L

Given N and L, return a list of numbers (in ascending order) that divides the interval [-L L] into N equal-length segments. F...

bijna 3 jaar ago

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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...

bijna 3 jaar ago

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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...

bijna 3 jaar ago

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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)).

bijna 3 jaar ago

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Getting logical indexes

This is a basic MATLAB operation. It is for instructional purposes. --- Logical indexing works like this. thresh = 4...

bijna 3 jaar ago

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03 - Matrix Variables 2

Make the following variable: <<http://samle.dk/STTBDP/Assignment1_3b.png>> A 9x9 matrix of zeros, but with the following v...

bijna 3 jaar ago

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Back to basics 4 - Search Path

Covering some basic topics I haven't seen elsewhere on Cody. Return a string that is the user's portion of the current search...

bijna 3 jaar ago

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Make a random, non-repeating vector.

This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...

bijna 3 jaar ago

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Maximum value in a matrix

Find the maximum value in the given matrix. For example, if A = [1 2 3; 4 7 8; 0 9 1]; then the answer is 9.

bijna 3 jaar ago

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Back to basics 3 - Temp Directory

Covering some basic topics I haven't seen elsewhere on Cody. Return a string that is the path to the system's current temp di...

bijna 3 jaar ago

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02 - Vector Variables 2

Make the following variable: <<http://samle.dk/STTBDP/Assignment1_2b.png>>

bijna 3 jaar ago

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03 - Matrix Variables 4

Make the following variable: <<http://samle.dk/STTBDP/Assignment1_3d.png>> A 3x4 NaN (Not a Number) matrix (Hint: use ...

bijna 3 jaar ago

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03 - Matrix Variables 3

Make the following variable: <<http://samle.dk/STTBDP/Assignment1_3c.png>> A 10x10 matrix where the numbers from 1 to 100 ...

bijna 3 jaar ago

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Replace Vector Elements

Replace all elements in a vector which are equal to or smaller than zero with 0.1. Example: A = [1 2 3 -1 0 2 -3 -80]; ...

bijna 3 jaar ago

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Count photos

Given n people, everyone must have pictures taken with everyone, each photo includes only two persons, please count the total nu...

bijna 3 jaar ago

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2 b | ~ 2 b

Given a string input, output true if there are 2 b's in it, false if otherwise Examples: 'Macbeth' -> false 'Publius Cor...

bijna 3 jaar ago

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Create a square matrix of multiples

Given an input, N, output a matrix N x N with each row containing multiples of the first element of each row. This also applies...

bijna 3 jaar ago

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01 - Scalar variables

Create the following variables: <<http://samle.dk/STTBDP/Assignment1_1.png>>

bijna 3 jaar ago