Jered Wells

Duke Health

Last seen: 3 mois il y a | Actif depuis 2012

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Radiation physicist at Landauer Medical Physics specializing in medical image processing, radiation dosimetry, and medical image quality and metrology. Other specialties include noise/dose reduction, image segmentation, and algorithm development.

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lorentzfit(x,y,varargin)
LORENTZFIT fits a single- or multi-parameter Lorentzian function to data

plus de 4 ans il y a | 43 téléchargements |

A résolu

How to subtract?
* Imagine you need to subtract a few numbers using MATLAB. * You will not be using eval for this task. * Given two ASCII strin...

plus de 7 ans il y a

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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...

plus de 7 ans il y a

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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 ...

plus de 7 ans il y a

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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...

plus de 7 ans il y a

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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 ...

plus de 7 ans il y a

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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...

plus de 7 ans il y a

Question

How to use neural network to perform image segmentation?
I have a clinical need to perform lung segmentation on AP and PA chest radiographs. Using conventional segmentation techniques (...

plus de 7 ans il y a | 1 réponse | 0

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nortonbeer(W,varargin)
NORTONBEER produces a one-dimensional Norton-Beer apodization filter

plus de 7 ans il y a | 4 téléchargements |

Question

Why does MATLAB resample display data for *some* large images and not others? Can this be turned off?
When displaying large images (i.e. images with dimension greater than the screen resolution) using IMSHOW, IMAGESC, and similar ...

environ 8 ans il y a | 1 réponse | 0

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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...

plus de 8 ans il y a

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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.

plus de 8 ans il y a

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

plus de 8 ans il y a

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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 ...

plus de 8 ans il y a

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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...

plus de 8 ans il y a

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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:...

plus de 8 ans il y a

A soumis

Grayscale Canny Edge Detection
Performs Canny edge detection with grayscale magnitude and direction outputs

plus de 9 ans il y a | 1 téléchargement |

Question

Can I run a "clear java" command but still keep a variable in the workspace?
Hi: I am trying to run "clear java" after temporarily modifying some files in the dynamic Java path. This also clears all var...

presque 10 ans il y a | 2 réponses | 0

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Question

Use ImageJ to read DICOM header data
MATLAB's dicominfo function sometimes misreads DICOM header data. I'd like to automatically call ImageJ from the MATLAB command ...

environ 10 ans il y a | 1 réponse | 0

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dicomLUT
DICOMLUT applies an embedded lookup table to a DICOM image

presque 11 ans il y a | 1 téléchargement |

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Center of Mass
CENTEROFMASS finds the center of mass of the N-dimensional input array

presque 12 ans il y a | 3 téléchargements |

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Point cloud normal vector
NORMND computes the vector normal to points in an N-D point cloud

presque 12 ans il y a | 2 téléchargements |

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Simpson's 1/3 and 3/8 rules
SIMPSON: Simpson's rule for quadratic and cubic numerical integration

presque 13 ans il y a | 7 téléchargements |

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Stem and leaf plot
This is a simple utility for making stem and leaf plots output to the command window.

environ 13 ans il y a | 37 téléchargements |

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R-square: The coefficient of determination
RSQUARE is a simple routine for computing R-square (coefficient of determination).

environ 13 ans il y a | 5 téléchargements |

A soumis

OrthoView3D
MATLAB GUI for exploring 3D datasets through a sleek and simple interface (sample dataset included)

environ 13 ans il y a | 1 téléchargement |

Jered Wells

Duke Health

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