# Gurudatha Pai

### University of Wyoming

http://uwstudents.uwyo.edu/gpai

Professional Interests: signal processing, system identification, power system stability studies

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**Content Feed**

Question

Why does Microsoft Outlook not like MATLAB's .MAT files?

Hello All, This is not a MATLAB question but I would really appreciate any comments. In my experience, outlook blocks .mat...

8 years ago | 3 answers | 3

### 3

answersHow to plot common zero crossings of 3 different signals (3 sinusoidal signals)?

This may sub-optimal but definitely a start. I would find the zero crossings of each as a vector of 1's and 0's and add them. Th...

8 years ago | 0

| accepted

Question

Matlab's Strange Behavior

>> fprintf('%4d, %1.6f, %1.6f\n',1, 1.1, 1.2) 1, 1.100000, 1.200000 >> disp(fprintf('%4d, %1.6f, %1.6f\n',1, 1.1, 1.2)...

8 years ago | 1 answer | 0

### 1

answerSolved

Target sorting

Sort the given list of numbers |a| according to how far away each element is from the target value |t|. The result should return...

9 years ago

Solved

How to find the position of an element in a vector without using the find function

Write a function posX=findPosition(x,y) where x is a vector and y is the number that you are searching for. Examples: fin...

9 years ago

Solved

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.

9 years ago

Solved

Find common elements in matrix rows

Given a matrix, find all elements that exist in every row. For example, given A = 1 2 3 5 9 2 5 9 3 2 5 9 ...

9 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...

9 years ago

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...

9 years ago

How to determine the order of ARMA and AR coefficient ?

Model order selection is often a tricky business. Inspecting the Hankel singular values is one many methods. There are many such...

9 years ago | 0

Question

Is there a faster way to implement a FIFO (queue) ?

Hi, I was wondering if somebody could comment on my use of array indexing. I have a recursive function which uses some initial c...

9 years ago | 0 answers | 0

### 0

answersQuestion

Help understanding an error

Hello all, I am in a simple situation with an error that doesn't tell you a whole lot. I have a plot that I want to save as a...

9 years ago | 2 answers | 0

### 2

answersSolved

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".

9 years ago

Solved

Remove the vowels

Remove all the vowels in the given phrase. Example: Input s1 = 'Jack and Jill went up the hill' Output s2 is 'Jck nd Jll wn...

9 years ago

Solved

Summing digits

Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

9 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...

9 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...

9 years ago

Solved

Return the 3n+1 sequence for n

A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

9 years ago

Solved

Find the numeric mean of the prime numbers in a matrix.

There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

9 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...

9 years ago

Solved

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. Example...

9 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...

9 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...

9 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...

9 years ago

Solved

Fibonacci sequence

Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

9 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...

9 years ago

Question

What are the rules for naming script files?

Hello, This is perhaps one of those "I-know-the-answer-still-I-ask" questions. Today, I had a strange error in one of my scri...

9 years ago | 2 answers | 1

### 2

answersWhat frustrates you about MATLAB?

I dont know if somebody has posted this already but I would like to mention that the auto-fill feature frustrates me a lot. I ca...

9 years ago | 0