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Manny Kins


Last seen: 1 year 前 |  自 2018 起处于活动状态

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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...

2 years 前 | 1 个回答 | 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 ...

2 years 前 | 1 个回答 | 0

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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...

2 years 前 | 1 个回答 | 0

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提问


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...

2 years 前 | 1 个回答 | 0

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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...

2 years 前 | 1 个回答 | 0

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提问


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...

2 years 前 | 1 个回答 | 0

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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 ...

5 years 前 | 2 个回答 | 0

2

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提问


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...

5 years 前 | 1 个回答 | 0

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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...

5 years 前 | 1 个回答 | 0

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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 ...

5 years 前 | 1 个回答 | 0

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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...

5 years 前 | 3 个回答 | 0

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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...

5 years 前 | 2 个回答 | 0

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个回答

提问


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 ...

5 years 前 | 1 个回答 | 0

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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...

5 years 前 | 0 个回答 | 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 ...

5 years 前 | 2 个回答 | 0

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提问


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 ...

5 years 前 | 2 个回答 | 0

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已解决


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....

5 years 前

已解决


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...

5 years 前

已解决


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

5 years 前

已解决


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.

5 years 前

已解决


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

5 years 前

已解决


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 ...

5 years 前

已解决


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...

5 years 前

已解决


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...

5 years 前

已解决


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...

5 years 前

已解决


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...

5 years 前

已解决


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

5 years 前

已解决


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...

5 years 前

已解决


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

5 years 前

已解决


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...

6 years 前

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