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# Neuropragmatist

### University College London

Last seen: 6 dagen ago Active 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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Question

How to provide cameraIntrinsics to triangulateMultiview
I am trying to triangulate matched points recorded by 5 different cameras using triangulateMultiview. The third input required ...

9 maanden ago | 1 answer | 0

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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.

meer dan een jaar ago

Solved

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

meer dan een jaar 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

meer dan een jaar 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

meer dan een jaar 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

meer dan een jaar 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...

meer dan een jaar 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....

meer dan een jaar 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.

meer dan een jaar 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,...

meer dan een 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]

meer dan een jaar 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...

meer dan een jaar 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...

meer dan een 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...

meer dan een jaar ago

Solved

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

meer dan een jaar ago

Solved

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

meer dan een jaar ago

Solved

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

meer dan een jaar 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...

meer dan een jaar ago | 0 answers | 0

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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)...

bijna 2 jaar ago | 1 answer | 0

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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...

bijna 2 jaar ago | 1 answer | 0

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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 ...

bijna 2 jaar ago | 1

| accepted

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,...

bijna 2 jaar ago | 0

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...

bijna 2 jaar ago | 0

| accepted

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...

bijna 2 jaar ago | 0

| accepted

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...

meer dan 2 jaar ago | 0

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...

bijna 3 jaar ago | 0

| accepted

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...

bijna 3 jaar ago | 0

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://...

bijna 3 jaar ago | 0

| accepted

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...

bijna 3 jaar ago | 0

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...

bijna 3 jaar ago | 0