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Will Dampier


Drexel University

57 total contributions since 2007

Professional Interests: bioinformatics

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Question


Creating backwards compatible p-code for teaching purposes
I am teaching some matlab classes and we have some version-ing issues ... some students use versions as old as 2008b and some of...

3 years ago | 1 Answers | 1

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answer

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Nearest Numbers
Given a row vector of numbers, find the indices of the two nearest numbers. Examples: [index1 index2] = nearestNumbers([2 5 3...

3 years ago

Solved


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...

3 years ago

Solved


Duplicate each element of a vector.
for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Ex...

3 years ago

Solved


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...

3 years ago

Solved


Matrix which contains the values of an other matrix A at the given locations.
If you have two matrices, which together give xc and yc coordinates into another matrix, eg : xc = [1 1 1; 2 2 1]; ...

3 years ago

Solved


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,...

3 years ago

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Getting the indices from a vector
This is a basic MATLAB operation. It is for instructional purposes. --- You may already know how to <http://www.mathworks....

3 years ago

Solved


Return the first and last character of a string
Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

3 years ago

Solved


Remove all the consonants
Remove all the consonants in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill'; Output s2 is 'a ...

3 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...

3 years ago

Solved


Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

3 years ago

Solved


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...

3 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...

3 years ago

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

3 years ago

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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 ...

3 years 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 ...

3 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 ...

3 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:...

3 years ago

Solved


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...

5 years ago

Solved


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

5 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...

5 years ago

Question


Lower bound on p-value returned by corr
I'm using corr to calculate the p-value for the correlation between two datasets. It keeps returning a p-value of Zero. Do...

5 years ago | 1 Answers | 0

1

answer

Question


Creating a backwards compatable p-code file
I am teaching some matlab classes and we have some version-ing issues ... some students use versions as old as 2008b and some of...

5 years ago | 0 Answers | 0

0

answers

Question


Combining specific regions of multiple images in a stripe pattern.
[EDIT: 20110526 15:43 CDT - reformat - WDR] I'm trying to combine images into a "stripe" pattern. Below are two example images....

5 years ago | 0 Answers | 0

0

answers

Answered
Using MATLAB with Chessboard arrangements problem
Now, 15 hours after the deadline I've finally gotten all submissions I'll post my solution based on Andrew's solution. Its much ...

5 years ago | 0

Answered
How to import numerous excel files into MATLAB?
You won't be able to load them all at once but you could easily use a for-loop to process them one at a time. Something like thi...

5 years ago | 1

| accepted

Question


Is there a way to skip "pause" statements
I'm grading hundreds of student assignments using a semi-automated method. However, a large portion of the students have includ...

6 years ago | 1 Answers | 0

1

answer

Responded


Re: Spring 2010 MATLAB Contest, April 28 - May 5
I've downloaded the example files and it seems like the testsuite_sample.mat file is corrupt and won't unzip properly. Is anyon...

6 years ago | 34948 views

Submitted


SeqLogoFig
This is a wrapper around the bioinformatics SeqLogo function that creates a REAL matlab figure.

6 years ago | 1 downloads |

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