Answered

vector index of consecutive gap (NaN) lengths?

Thomas' answer is faster, but here is my go: A = [2 4 NaN 7 9 NaN NaN NaN 32 NaN NaN 8]; idx = isnan(A); [B n]= bwlab...

vector index of consecutive gap (NaN) lengths?

Thomas' answer is faster, but here is my go: A = [2 4 NaN 7 9 NaN NaN NaN 32 NaN NaN 8]; idx = isnan(A); [B n]= bwlab...

oltre 10 anni ago | 1

Solved

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...

oltre 10 anni ago

Question

Finding distance between endpoints of image segment: PixelList vs 'endpoints'

New Code: %% Calculate Tortuosity disp('Calculating tortuosity of large segments'); V = thin8-imdilate(cr...

oltre 10 anni ago | 2 answers | 1

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Most nonzero elements in row

Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

oltre 10 anni ago

Answered

Filling with color the space between to polynomial curves to represent error area.

Check out this FEX submission, it should do what you want: <http://www.mathworks.com/matlabcentral/fileexchange/13188-shade-...

Filling with color the space between to polynomial curves to represent error area.

Check out this FEX submission, it should do what you want: <http://www.mathworks.com/matlabcentral/fileexchange/13188-shade-...

oltre 10 anni ago | 0

Answered

Reshaping Blobs in a Binary

use region props area measurements and dilate the centroid points with a disk structuring element with the appropriate radius (a...

Reshaping Blobs in a Binary

use region props area measurements and dilate the centroid points with a disk structuring element with the appropriate radius (a...

oltre 10 anni ago | 0

Question

Help understanding the imbothat function.

I am using the function _imbothat_ as part of a larger image processing algorithm and it works great for what I need (I found th...

oltre 10 anni ago | 1 answer | 1

Answered

How to segment 2D breast images using fuzzy c-means algorithm

I am guessing you are using a DICOM file since this is a CT image? If so, use Image = dicomread(filename); (Help page ...

How to segment 2D breast images using fuzzy c-means algorithm

I am guessing you are using a DICOM file since this is a CT image? If so, use Image = dicomread(filename); (Help page ...

oltre 10 anni ago | 1

Solved

The Hitchhiker's Guide to MATLAB

Output logical "true" if the input is the answer to life, the universe and everything. Otherwise, output logical "false".

oltre 10 anni ago

Solved

Pizza!

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

oltre 10 anni ago

Solved

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...

oltre 10 anni ago

Answered

Small simple question about displaying multiple pictures or objects

% Generate random pictures PicNum = 5; PicSize = 100; J = zeros(PicSize,PicSize,PicNum); % Always good to preallocate...

Small simple question about displaying multiple pictures or objects

% Generate random pictures PicNum = 5; PicSize = 100; J = zeros(PicSize,PicSize,PicNum); % Always good to preallocate...

oltre 10 anni ago | 1

| accepted

Solved

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...

oltre 10 anni ago

Solved

Triangle Numbers

Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

oltre 10 anni ago

Answered

Generating reconstructed image from a sinogram without using 'iradon'

<http://www.wepapers.com/Papers/78923/Filtered_Backprojection_Algorithm_in_MATLAB.ppt> That may help you.

Generating reconstructed image from a sinogram without using 'iradon'

<http://www.wepapers.com/Papers/78923/Filtered_Backprojection_Algorithm_in_MATLAB.ppt> That may help you.

oltre 10 anni ago | 0

Answered

noise removel

I = 3 * sin(.3*[1:500]')*ones(1,500) + 3 * cos(.2*[1:500]')*ones(1,500) + 0.5*ones([500 500]); % Generate random sine wave im...

noise removel

I = 3 * sin(.3*[1:500]')*ones(1,500) + 3 * cos(.2*[1:500]')*ones(1,500) + 0.5*ones([500 500]); % Generate random sine wave im...

oltre 10 anni ago | 0

Answered

How to make a FOR loop to be efficient

Perhaps break this into two separate iterations where the first optimization happens more crudely using parameters spaced more g...

How to make a FOR loop to be efficient

Perhaps break this into two separate iterations where the first optimization happens more crudely using parameters spaced more g...

oltre 10 anni ago | 0

Solved

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...

oltre 10 anni ago

Solved

Weighted average

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

oltre 10 anni ago

Solved

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 ...

oltre 10 anni ago

Solved

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 ...

oltre 10 anni ago

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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...

oltre 10 anni ago

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Determine if input is odd

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

oltre 10 anni ago

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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 ...

oltre 10 anni ago

Solved

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...

oltre 10 anni ago

Answered

Background Subtraction

There are various methods to better segment your image and most are best dealt with on a case by case basis. Check out Image ...

Background Subtraction

There are various methods to better segment your image and most are best dealt with on a case by case basis. Check out Image ...

oltre 10 anni ago | 0