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# Matthew

### North Carolina State University

191 total contributions since 2013

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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...

4 mois 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: ...

4 mois 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...

4 mois 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...

4 mois ago

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Piecewise linear interpolation
Given an Mx2 vector and a row of M-1 integers, output a two column vector that linearly interpolates Y times between each succes...

4 mois ago

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Find nth maximum
Find nth maximum in a vector of integer numbers. Return NaN if no such number exists. x = [2 6 4 9 -10 3 1 5 -10]; So ...

4 mois ago

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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...

4 mois ago

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Create an index-powered vector
Given a input vector x, return y as index-powered vector as shown below. Example x = [2 3 6 9] then y should be [...

4 mois ago

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Max index of 3D array
Given a three dimensional array M(m,n,p) write a code that finds the three coordinates x,y,z of the Maximum value. Example ...

4 mois ago

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Create an n-by-n null matrix and fill with ones certain positions
The positions will be indicated by a z-by-2 matrix. Each row in this z-by-2 matrix will have the row and column in which a 1 has...

4 mois ago

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Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

4 mois ago

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Breaking Out of the Matrix
Do you want to take the Red Pill, or the Blue Pill? If you take the Blue Pill, you will simply pass along to the next problem...

4 mois ago

Question

Scattered Interpolation: Defining my own triangulation?
I'm interpolating data the comes from polar coordiate systems or terrain-following coordiante system used in numerical weather m...

4 mois ago | 0 answers | 0

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Project Euler: Problem 1, Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

5 mois ago

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Interpolator
You have a two vectors, a and b. They are monotonic and the same length. Given a value, va, where va is between a(1) and a(end...

6 mois ago

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Balanced number
Given a positive integer find whether it is a balanced number. For a balanced number the sum of first half of digits is equal to...

6 mois ago

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Making change
Given an amount of currency, return a vector of this form: [100 50 20 10 5 2 1 0.5 0.25 0.1 0.05 0.01] Example: Input a = ...

6 mois ago

how can i show my hyperspectral data in a two dimensional projection of hyperspectral cube?
To control the orientation of the image, read the documentation for 3-D camera control: https://www.mathworks.com/help/matlab/v...

7 mois ago | 0

How to calculate mean value of a parameter within interval of other parameters
Assuming I've understood your description of your arrays correctly... i.e. that int_X and int_Y contain max and min values for t...

7 mois ago | 0

Question

Exportgraphics and TiledLayout: Figure Handle vs TiledLayout handle?
In the documentation for exportgraphics, when saving a multi-panel plot make with TiledLayout, the TiledLayout handle is passed ...

7 mois ago | 1 answer | 0

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Symmetry of vector
Determine whether the vector is symmetric or not (vector could be even or odd in length). For example: x = [1 2 3 3 2 1] ...

7 mois ago

How can I plot RHI from weather radar data ?
I suggest using PyART. But, for Matlab: If you have a cfradial type data file the data are stored in 2-D arrays (gates x rays ...

7 mois ago | 0

How to vary the pixel size in matlab imagesc() plot?
What I understand your issue to be is that you have non-uniform spacing of you data points along the x-axis of your data and you...

7 mois ago | 0

Solved

Is the Point in a Triangle?
Check whether a point or multiple points is/are in a triangle with three corners Points = [x, y]; Triangle = [x1, y1; x...

7 mois ago

Solved

Calculate the area of a triangle between three points
Calculate the area of a triangle between three points: P1(X1,Y1) P2(X2,Y2) P3(X3,Y3) these three points are the vert...

7 mois ago

Solved

Natural numbers in string form
Create a cell array of strings containing the first n natural numbers. _Slightly_ harder than it seems like it should be. Ex...

7 mois ago

how can i show my hyperspectral data in a two dimensional projection of hyperspectral cube?
If your data is something like (x,y,spectra), you could try: imagesc(your_data(:,:,1)); If your data is like (spectra, x, y) ...

7 mois ago | 0

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Create a cell array out of a struct
Create a cell array out of a (single) struct with the fieldname in the first column and the value in the second column: in: ...

7 mois ago

Question

exportgraphics: need error explained
I'm trying to export of multi-panel plot that contains 4 imagesc plots and two surf plots with the new exportgraphics command wi...

7 mois ago | 0 answers | 0