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Manny Kins


Last seen: alrededor de 2 años hace |  Con actividad desde 2018

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Estadística

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Filling a region of a grayscale image with a colour corresponding to colorbar
Hi all, I have a task in which I want to draw around certain areas of an image and fill those areas with a semi-transparent colo...

casi 3 años hace | 1 respuesta | 0

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Mapping two sets of co-ordinates with two different colours onto blank white screen
Hi, I have a blank Screen with dimensions: Screen = 255*ones(1024,1280,3); Where 1024 and 1280 are the height and width and 3 ...

casi 3 años hace | 1 respuesta | 0

1

respuesta

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Finding intensity of region inside a circle from image
Hi all, I have this image below of a circular bead (also attached): I would like to calculate the average intensity of all p...

alrededor de 3 años hace | 1 respuesta | 0

1

respuesta

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Finding the full width half maximum (FWHM) of a rounded part of peak instead of sharp peaks
Hi, I have this plot where I want to find the FWHM around the main "bulge" of the plot (around the red line I have crudely dra...

alrededor de 3 años hace | 1 respuesta | 0

1

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Plotting colourful line over gray image whilst retaining colourbar information
Hi, I would like to plot a colourful trajectory on top of a grayscale image whilst retaining the colour information of the traje...

alrededor de 3 años hace | 1 respuesta | 0

1

respuesta

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Curve fitting with loglog data
I am having some issues fitting a curve using polyfit to log data. I think I am making a silly mistake during the fit plotting a...

más de 3 años hace | 1 respuesta | 0

1

respuesta

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Removing data from a structure that is less than a certain threshold
I am running a code to find the positions and trajectories of microparticles. I get a lot of noise as my particle concentration ...

más de 5 años hace | 2 respuestas | 0

2

respuestas

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Finding length of a struct, excluding NaN values
I have a struct with the following layout: T X Y [0,1] [0, 1] [0,5] [0] [2] [2] NaN NaN NaN NaN NaN NaN N...

más de 5 años hace | 1 respuesta | 0

1

respuesta

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Help optimising code that creates linked particle trajectories from single particle positions in each frame
The code below takes particle positions that I have found in each frame of a video and compares nearest neighbours to build part...

más de 5 años hace | 1 respuesta | 0

1

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What are the thought processes that go on when you are trying to solve a MATLAB problem?
I am (fairly) new to MATLAB, just started using it more heavily these past few months (before then I just used it to make basic ...

más de 5 años hace | 1 respuesta | 0

1

respuesta

Pregunta


Removing NaNs from a struct
I have a struct with the following layout: T X Y [0,1] [0, 1] [0,5] [0] [2] [2] NaN NaN NaN NaN NaN NaN N...

más de 5 años hace | 3 respuestas | 0

3

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Making a video showing trajectories of particles
I have some X, Y and T (time) co-ordinates for my particles (attached) and I want to plot and make a video of all of my particle...

más de 5 años hace | 2 respuestas | 0

2

respuestas

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Removing unique numbers whilst comparing two structures
I have two structs, one called AllPositions_CA with X and Y fields containing this type of layout: X ...

más de 5 años hace | 1 respuesta | 0

1

respuesta

Pregunta


Finding circles in clusters
I have this image of spherical particles with varying shades. I wanted to find a way to find the centers of all of them (es...

más de 5 años hace | 0 respuestas | 0

0

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Finding arrays above threshold value
I have a struct AT.AX AX has the following values: 1x370 double 1x1007 double 1x3957 double 1x6309 double 1x1648 double ...

más de 5 años hace | 2 respuestas | 0

2

respuestas

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How do I remove NaN values from a matrix and retain matrix shape?
Say for example I have the following array X = [1 3 4; 5 6 8; NaN NaN NaN] X = 1 3 4 5 6 8 ...

más de 5 años hace | 2 respuestas | 0

2

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Resuelto


Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

más de 5 años hace

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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

más de 5 años hace

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Return area of square
Side of square=input=a Area=output=b

más de 5 años hace

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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.

más de 5 años hace

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Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

más de 5 años hace

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Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

más de 5 años hace

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Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

casi 6 años hace

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Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

casi 6 años hace

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

casi 6 años hace

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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...

casi 6 años hace

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

casi 6 años hace

Resuelto


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...

alrededor de 6 años hace

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

alrededor de 6 años hace

Resuelto


Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

más de 6 años hace

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