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Neuropragmatist


Last seen: 2 dagen ago

University College London

110 total contributions since 2018

Trained in neuroscience and electrophysiology but self-taught in programming. My solutions may not be the fastest or most elegant but on average they work at an above chance level.

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Solved


Find the area of the four walls
If length, breadth and height of the walls are given, find the area of the four walls.

ongeveer een maand ago

Solved


Reverse a matrix
Its simple. You have to reverse a given matrix.

ongeveer een maand ago

Solved


Find the dimensions of a matrix
Just find the number of columns of the given matrix. Example x = [1 2 3 4 5 6] y = 2

ongeveer een maand ago

Solved


Sum of diagonal of a square matrix
If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

ongeveer een maand ago

Solved


find the surface area of a cube
given cube side length x, find the surface area of the cube, set it equal to y

ongeveer een maand ago

Solved


Rounding off numbers to n decimals
Inspired by a mistake in one of the problems I created, I created this problem where you have to round off a floating point numb...

ongeveer een maand ago

Solved


Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

ongeveer een maand ago

Solved


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.

ongeveer een maand 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,...

ongeveer een maand 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]

ongeveer een maand ago

Solved


Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

ongeveer een maand ago

Solved


Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

ongeveer een maand 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...

ongeveer een maand ago

Solved


Is my wife right?
Regardless of input, output the string 'yes'.

ongeveer een maand ago

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Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

ongeveer een maand ago

Solved


Add two numbers
Given a and b, return the sum a+b in c.

ongeveer een maand ago

Question


Shuffling matrix regions while maintaining their shape
Hi all, I want to segment a matrix into parts, then move those parts around while maintaining their shape as far as possible (b...

ongeveer een maand ago | 0 answers | 0

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answers

Question


Calculating mean integrated squared error (MISE)
Hi all, I have a bivariate probability distribution ( f1(x) ) and a histogram of real data that I want to compare to it ( f2(x)...

3 maanden ago | 1 answer | 0

1

answer

Question


Histograms - why does the smallest binsize always give the smallest mean integrated squared error?
Hi all, I have a bit of a specialised question involving histograms and mean integrated squared error (MISE). I want to find th...

4 maanden ago | 1 answer | 0

1

answer

Answered
How to do Chi square with contingency tables?
Crosstabs expects the raw data as vectors, if you only have counts you will need to expand your data into vectors, for instance ...

4 maanden ago | 1

| accepted

Answered
Undefined function or variable 'netcdf'
I think your line is supposed to be: f = netcdf.open('algiers_bay.grd','r'); Because netcdf on it's own doesn't do anything,...

4 maanden ago | 0

Answered
How to plot Data from a table filled with strings?
I think your problem is just that the cell array contains strings of different lengths, you can try converting them to numbers i...

4 maanden ago | 0

| accepted

Answered
Can anyone tell me how does this code works?
Hi, It is difficult to know exactly what the code is doing without the data files it is loading. However, at first glance I wo...

4 maanden ago | 0

| accepted

Answered
i have a data set containing urls of images.How can i download all the images from those urls using matlab?
You can read the data into Matlab using importdata: https://uk.mathworks.com/help/matlab/ref/importdata.html?s_tid=doc_ta Then...

ongeveer een jaar ago | 0

Answered
Please provide in depth details on PCA MATLAB function
How many features do you give the PCA when you give it the dataset? Just the XY values you plotted in the first graph? Or do you...

ongeveer een jaar ago | 0

| accepted

Answered
how do i live plot 3 different values?
Can you be more precise in what you want to achieve? For example, here is the Matlab help example given for animatedline: numpo...

ongeveer een jaar ago | 0

Answered
Maximum perpendicular distance from line to convex hull boundary
I had to do something similar to this some time ago, sorry I don't really remember the specifics but I used rayTriGPU: https://...

ongeveer een jaar ago | 0

| accepted

Answered
Model Based Reinforcement Learning
Your agent shouldn't be able to make 'invalid' actions at all. For undesired actions, as you say the correct reward function wit...

ongeveer een jaar ago | 0

Answered
How to Filter Datasheet
Why do you want to do this? Its certinaly poossible to write code to do what you want, I'm just wondering if maybe there is a m...

ongeveer een jaar ago | 0

Answered
compress a 3D volume into a 2D image
Could you project the data along each axis (using mean(data,dim) for instance) to get 3 two dimensional images and then do the t...

ongeveer een jaar ago | 1

| accepted

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