# Panos Kerezoudis

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**Feeds**

Question

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 ...

11 maanden ago | 1 answer | 1

### 1

answerQuestion

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...

meer dan een jaar ago | 1 answer | 0

### 1

answerQuestion

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 ...

meer dan een jaar ago | 1 answer | 0

### 1

answerQuestion

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...

meer dan een jaar ago | 2 answers | 0

### 2

answersQuestion

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...

meer dan een jaar ago | 1 answer | 0

### 1

answerQuestion

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...

meer dan een jaar ago | 1 answer | 0

### 1

answerQuestion

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:...

meer dan een jaar ago | 1 answer | 0

### 1

answerQuestion

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. ...

meer dan een jaar ago | 1 answer | 0

### 1

answerSolved

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]; ...

bijna 2 jaar ago

Solved

Roll the Dice!

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

bijna 2 jaar ago

Solved

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,...

bijna 2 jaar 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.

bijna 2 jaar 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]

bijna 2 jaar 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 ...

bijna 2 jaar 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...

bijna 2 jaar 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 ...

bijna 2 jaar 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...

bijna 2 jaar 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:...

bijna 2 jaar 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 ...

bijna 2 jaar 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...

bijna 2 jaar ago | 2 answers | 0

### 2

answersQuestion

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...

bijna 2 jaar ago | 1 answer | 0

### 1

answerSolved

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...

bijna 2 jaar 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...

bijna 2 jaar 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...

bijna 2 jaar 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)

bijna 2 jaar ago

Solved

Replace 0 indices in array with 1's

Take a incoming vector, and replace 0's with ones

bijna 2 jaar ago

Solved

Simple Vector Addition

Take two incoming vectors and output the sum of the two vectors

bijna 2 jaar 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...

bijna 2 jaar ago

Solved

Find the Best Hotels

Given three input variables: * |hotels| - a list of hotel names * |ratings| - their ratings in a city * |cutoff| - the rat...

bijna 2 jaar ago

Solved

Find MPG of Lightest Cars

The file |cars.mat| contains a table named |cars| with variables |Model|, |MPG|, |Horsepower|, |Weight|, and |Acceleration| for ...

bijna 2 jaar ago