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Thomas


Stockholm University

Last seen: 8 jours il y a |  Actif depuis 2012

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Professional Interests: TEM, Image analysis, EELS, Spectral Imaging, Photography

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Question


Shuffle method on custom datastore written for a single binary file
I am writing a custom datastore and am seeking some assistance. My datasets consist of stacks of 2D images (frames) stored sequ...

environ 4 ans il y a | 1 réponse | 0

1

réponse

Question


Visualizing image deformation (object shrinkage)
I have two images of the same, complex object taken at two different times. The object has shrunk between images and I need to ...

plus de 4 ans il y a | 1 réponse | 0

1

réponse

Question


Smooth interpolation for warping an image using a deformation map
I have a series of 2D images that I need to register similar to the one below. The registration is neither geometric nor ri...

presque 6 ans il y a | 1 réponse | 0

0

réponse

A résolu


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...

presque 8 ans il y a

A résolu


Matrix indexing with two vectors of indices
Given a matrix M and two index vectors a and b, return a row vector x where x(i) = M(a(i),b(i)).

presque 8 ans il y a

A résolu


Getting logical indexes
This is a basic MATLAB operation. It is for instructional purposes. --- Logical indexing works like this. thresh = 4...

presque 8 ans il y a

A résolu


Sum all integers from 1 to 2^n
Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

presque 8 ans il y a

A résolu


Return elements unique to either input
Given two numeric inputs a and b, return a row vector that contains the numbers found in only a or only b, but not both. For ex...

presque 8 ans il y a

A résolu


Replicate elements in vectors
Replicate each element of a row vector (with NaN) a constant number of times. Examples : n=2, A=[1 2 3] -> [1 1 2 2 3 3] n=0...

presque 8 ans il y a

A résolu


Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

presque 8 ans il y a

A résolu


Find the largest value in the 3D matrix
Given a 3D matrix A, find the largest value. Example >> A = 1:9; >> A = reshape(A,[3 1 3]); >> islargest(A) a...

presque 8 ans il y a

A résolu


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,...

presque 8 ans il y a

A résolu


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...

presque 8 ans il y a

A résolu


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...

presque 8 ans il y a

A résolu


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...

presque 8 ans il y a

A résolu


Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...

presque 8 ans il y a

A résolu


Column Removal
Remove the nth column from input matrix A and return the resulting matrix in output B. So if A = [1 2 3; 4 5 6]; and ...

presque 8 ans il y a

A résolu


Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

presque 8 ans il y a

A résolu


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

presque 8 ans il y a

A résolu


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

presque 8 ans il y a

A résolu


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

presque 8 ans il y a

A résolu


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

presque 8 ans il y a

A résolu


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 ...

presque 8 ans il y a

A résolu


Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

presque 8 ans il y a

Réponse apportée
Use griddedinterpolant to interpolate over missing values
Both of the suggestions by Walter and Guillaume worked very well for me. If I choose to use the exact syntax I suggested above,...

presque 8 ans il y a | 1

Question


Use griddedinterpolant to interpolate over missing values
I would like to use griddedInterpolant to interpolate over datapoints that I need to discard from an N-dimensional matrix. Spec...

presque 8 ans il y a | 3 réponses | 0

3

réponses

A résolu


Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

environ 8 ans il y a

Réponse apportée
How can I insert the *contents* of a string variable directly into my code?
This solution worked very well for me, thanks! I had to make one minor modification. I should enclose the string in double quo...

environ 8 ans il y a | 0

Question


How can I insert the *contents* of a string variable directly into my code?
I am working with git version control and would like to use the following function to commit my changes: function gitCommit...

environ 8 ans il y a | 3 réponses | 0

3

réponses

Question


Improving the consistency of the NNMF function
I'm attempting to use non-negative matrix factorization on a matrix containing spectral information (A). Whenever I run the nnm...

environ 10 ans il y a | 1 réponse | 0

1

réponse

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