# Andrew Davis

### McMaster University

Professional Interests: MR Imaging, Image Processing, Signal Processing, Medical Physics

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**Content Feed**

The position of x-label is reset to the original position when printing a 'boxplot' figure

I had this same problem -- very frustrating! Especially since <http://www.mathworks.com/support/solutions/en/data/1-BNAHS4/?prod...

9 years ago | 0

How to save an image with an overlay mask applied to it?

Alphamask is a display tool. Your 'OverlayMask' variable is a scalar because alphamask returns a handle to the graphic. If you...

10 years ago | 1

| accepted

Submitted

GETCLIM: Suggest appropriate values for colormap limits

Determines thresholds such that 2% of data values will be mapped to the extremes of the colormap

10 years ago | 1 download |

Submitted

STATMASK: Overlay image with coloured statistical mask

Overlay an image with a thresholded statistical mask. The mask values are not rescaled.

10 years ago | 1 download |

Submitted

WelchWin: Welch (parabolic) window function

The function returns a parabolic window of length n. This is useful for spectral estimation.

10 years ago | 1 download |

Submitted

ISEQUALFP: Check equality within floating point precision

Accepts two values, returns a logical indicating if they are equal within floating point precision

11 years ago | 1 download |

Submitted

FFTWN: Round up to efficient FFT integer

Accepts an integer n. Returns m>=n that is an optimum data length for fast FFT computation

11 years ago | 1 download |

Submitted

CHKZIP: check whether a file is a compressed archive

chkzip checks whether the file is a compressed archive and attempts to unpack it

11 years ago | 1 download |

Solved

Back and Forth Rows

Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

11 years ago

Solved

Sort a list of complex numbers based on far they are from the origin.

Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...

11 years ago

Solved

Is my wife right? Now with even more wrong husband

Again, as in "Is my wife right?" ( <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right> ), answer 'yes' r...

11 years 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 ...

11 years ago

Solved

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...

11 years ago

Solved

Determine if input is odd

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

11 years ago

Solved

Read a Soroban Abacus

*Description* The Soroban is the name of the modern Japanese abacus. Information on reading a Soroban can be found <http://we...

11 years ago

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...

11 years 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...

11 years ago

Solved

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 ...

11 years 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...

11 years 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...

11 years 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...

11 years 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...

11 years ago

Solved

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:...

11 years ago

Submitted

SEROUND: Round value and standard error

Input: value and associated standard error (or deviation) Output: string of rounded value +/- error

11 years ago | 1 download |

Submitted

FHROI: Interactive freehand ROI

Interactively specify 2D freehand ROI

11 years ago | 1 download |

Submitted

ALPHAMASK: semi-transparent image overlay

Overlay image with semi-transparent mask and return handle

11 years ago | 8 downloads |

Submitted

PWLINT: Piecewise Linear Integration

Return positive and negative areas, assuming a piecewise linear function

11 years ago | 1 download |