MATLAB user since 1987. MathWorker since 1993. Amateur French horn player. MATLAB design and development, image processing algorithms.

Image processing blog: https://blogs.mathworks.com/steve/

Solved

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 ...

circa 6 ore ago

Solved

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 [...

circa 6 ore ago

Solved

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] ...

circa 6 ore ago

Answered

imshow doesn't display png image file

Your image is stored in the PNG file as unsigned 16-bit integers. When imshow displays a uint16 image, it uses the unsigned 16-b...

imshow doesn't display png image file

Your image is stored in the PNG file as unsigned 16-bit integers. When imshow displays a uint16 image, it uses the unsigned 16-b...

circa 6 ore ago | 1

| accepted

Solved

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...

1 giorno ago

Answered

How to plot particle trajectories and normalise to 0,0 origin?

Here is one way you could do it. Read in the whole Excel file as a table. Then, in a loop, extract the particle data for each tr...

How to plot particle trajectories and normalise to 0,0 origin?

Here is one way you could do it. Read in the whole Excel file as a table. Then, in a loop, extract the particle data for each tr...

6 giorni ago | 1

Answered

From for to While loop

Here is one way to convert a typical MATLAB for loop to a while loop: for i = 1:N ... end i = 1; while i <= N .....

From for to While loop

Here is one way to convert a typical MATLAB for loop to a while loop: for i = 1:N ... end i = 1; while i <= N .....

7 giorni ago | 0

Answered

Select data from CSV file based on character in position, then read that character and next 2 character, of different read that character and next 3

MATLAB has a number of functions that can automatically read and parse CSV files and return the results in a useful form. Try re...

Select data from CSV file based on character in position, then read that character and next 2 character, of different read that character and next 3

MATLAB has a number of functions that can automatically read and parse CSV files and return the results in a useful form. Try re...

8 giorni ago | 0

Solved

QWERTY coordinates

Given a lowercase letter or a digit as input, return the row where that letter appears on a <http://en.wikipedia.org/wiki/Keyboa...

8 giorni ago

Solved

The Tower of Hanoi

In the <http://en.wikipedia.org/wiki/Tower_of_Hanoi Tower of Hanoi problem> with 3 rods (1, 2 & 3), the goal is to move a tower ...

12 giorni ago

Solved

Can we make a triangle?

Given three positive number, check whether a triangle can be made with these sides length or not. remember that in a triangle su...

12 giorni ago

Solved

Find the sides of an isosceles triangle when given its area and height from its base to apex

Find the sides of an isosceles triangle when given its area and the height from its base to apex. For example, with A=12 and ...

12 giorni ago

Solved

Height of a right-angled triangle

Given numbers a, b and c, find the height of the right angled triangle with sides a and b and hypotenuse c, for the base c. If a...

12 giorni ago

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...

13 giorni ago

Solved

Find my daddy long leg (No 's')

Given the ratio of the two legs (longer / shorter), and the hypotenuse length, find the value of the bigger leg.

14 giorni ago

Solved

Is this triangle right-angled?

Given any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return f...

14 giorni ago

Solved

Similar Triangles - find the height of the tree

Given the height, h1, of a power pole, shorter than a tree, a given distance, x2 away, please find h2, height of the tree. Pleas...

15 giorni ago

Solved

Right Triangle Side Lengths (Inspired by Project Euler Problem 39)

If _p_ is the perimeter of a right angle triangle with integral length sides, { _a_, _b_, _c_ }, there are exactly three solutio...

15 giorni ago

Solved

Great Circle Distance

Find shortest between two points on a ball given their azimuthal and polar angles (in degrees) as well as the radius of the sphe...

15 giorni ago

Answered

Vectorize "for"-loop in multidimentional array

It is conceivable that the loop might be eliminated with some sub2ind calculations followed by linear indexing, but I would expe...

Vectorize "for"-loop in multidimentional array

It is conceivable that the loop might be eliminated with some sub2ind calculations followed by linear indexing, but I would expe...

15 giorni ago | 0

Solved

Clockwise or Counterclockwise

Given a list of 2-d points defining the vertices of a polygon, determine whether these points are sorted clockwise. The input...

15 giorni ago

Solved

What is the distance from point P(x,y) to the line Ax + By + C = 0?

Given a point, P(x,y), find the distance from this point to a linear line. INPUTS: x, y, A, B, C OUTPUTS: d, the distance ...

18 giorni ago

Solved

Covering area

As an extension of the problem <http://www.mathworks.com/matlabcentral/cody/problems/416-polygon-area>, find the area, bounded b...

18 giorni ago

Solved

Circumscribed circles

Given the lengths of the 3 sides of a triangle, output the radius of the circumscribed circle. Example: [3 4 5] -> 2.5

18 giorni ago

Solved

Smallest distance between a point and a rectangle

Given two points *x* and *y* placed at opposite corners of a rectangle, find the minimal euclidean distance between another poin...

18 giorni ago

Solved

Spherical radius given four points

Determine the radius of a sphere provided four non-coplanar points on the surface of the sphere. pts = [x1 y1 z1; x...

18 giorni ago

Solved

Volume of a Parallelepiped

Calculate the volume of a Parallelepiped given the vectors for three edges that meet at one vertex. A cube is a special case ...

18 giorni ago

Answered

Sort a table in ascending order

The answer would be relatively straightforward, as well as much more efficient, if you would orient your table the other way. Wi...

Sort a table in ascending order

The answer would be relatively straightforward, as well as much more efficient, if you would orient your table the other way. Wi...

19 giorni ago | 0

| accepted

Solved

Find third Side of a right triangle given hypotenuse and a side. No * - or other functions allowed

Find the remaining side of a triangle given the hypotenuse and a side. However, the normal functions and symbols are not allowe...

19 giorni ago

Answered

How to transform a RGB matrix to a weighted adjacency matrix?

Borys, I tackled your problem and wrote a blog post about it: "Transforming a color image to a weighted adjacency matrix"

How to transform a RGB matrix to a weighted adjacency matrix?

Borys, I tackled your problem and wrote a blog post about it: "Transforming a color image to a weighted adjacency matrix"

20 giorni ago | 1

| accepted