Panos Kerezoudis

Last seen: 6 dagar ago | Active since 2023

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Segment data into overlapping windows
Hi! I have a vector of time series data (1x300), that I would like to segment into 20 segments that are 100 ms in duration and ...

12 månader ago | 1 answer | 1

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Group values in a vector
Hi, I have a long column vector ('trialnr', attached), whose elements are integer numbers from 1 to 55 (they index events in t...

mer än ett år ago | 1 answer | 0

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answer

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Sort elements in cell array in descending order
Hi! I hava a cell containing three row vectors and I would like to sort each vector in descending order. Other than using a ...

mer än ett år ago | 1 answer | 0

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answer

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Signal auto-correlation in matlab (xcorr function)
Hi! I am working on an EEG-electrophysiology dataset ('csd'). It is structured as a 3D array (channels x time x trials). The d...

mer än ett år ago | 2 answers | 0

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Arrange column vetors into table
Hi! I used the findpeaks function in matlab to find local maxima ('peaks') in a vector and their indices ('locs'). I would li...

mer än ett år ago | 1 answer | 0

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Attach first column with names to matrix with coordinates
Hi! I have a matrix ('positions') with 3 columns (x,y,z coordinates) and 200 rows (intracranial electodes). I also have a cha...

mer än ett år ago | 1 answer | 0

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Plot legend labels using loop
I am plotting the power spectrum from 16 channels. PSD was calculated using the pwelch function and its output has 3 dimensions:...

mer än ett år ago | 1 answer | 0

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Bar plot of categorical data
Hi! I have a small column vector (46x1). Each row has a number (0-7), where each number encodes a specific electrode location. ...

mer än ett år ago | 1 answer | 0

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Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; ...

nästan 2 år ago

Solved

Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

nästan 2 år ago

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Check if number exists in vector
Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

nästan 2 år ago

Solved

Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

nästan 2 år ago

Solved

Reverse the vector
Reverse the vector elements. Example: Input x = [1,2,3,4,5,6,7,8,9] Output y = [9,8,7,6,5,4,3,2,1]

nästan 2 år ago

Solved

Flip the vector from right to left
Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

nästan 2 år ago

Solved

Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

nästan 2 år ago

Solved

Doubling elements in a vector
Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

nästan 2 år ago

Solved

Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

nästan 2 år ago

Solved

Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

nästan 2 år ago

Solved

Return a list sorted by number of occurrences
Given a vector x, return a vector y of the unique values in x sorted by the number of occurrences in x. Ties are resolved by a ...

nästan 2 år ago

Question

MATLAB Problem. How to design matrix from eigenvalues
This is a previously posted problem that I am working on but I can't find any solutions online. Here is the description: Write...

nästan 2 år ago | 2 answers | 0

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answers

Question

Make loop more efficient
Hi! I am new to Matlab and I am currently going through coding exerices to become more skilled at it. I would appreciate any h...

nästan 2 år ago | 1 answer | 0

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answer

Solved

Convert a numerical matrix into a cell array of strings
Given a numerical matrix, output a *cell array of string*. For example: if input = 1:3 output is {'1','2','3'} whic...

nästan 2 år ago

Solved

Create a vector whose elements depend on the previous element
The idea is to create a vector A whose elements depend on the previous element : *A(i+1) = 2*A(i)+1* *2 Inputs*: - A : The...

nästan 2 år ago

Solved

Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

nästan 2 år ago

Solved

Find the mean of two vectors
Take two vectors, and output the mean of them (bonus if you don't use the in-built mean function)

nästan 2 år ago

Solved

Replace 0 indices in array with 1's
Take a incoming vector, and replace 0's with ones

nästan 2 år ago

Solved

Simple Vector Addition
Take two incoming vectors and output the sum of the two vectors

nästan 2 år ago

Solved

Rescale Scores
Each column (except last) of matrix X contains students' scores in a course assignment or a test. The last column has a weighted...

nästan 2 år ago

Solved

nästan 2 år ago

Solved

nästan 2 år ago

Panos Kerezoudis

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