Question

How do I clear the output from a list of .mlx files to reduce their size?

Live Editor files with their output figures etc. are much larger than those without. If I have a list of .mlx files, and want t...

4 months ago | 1 answer | 0

Answered

Creating a diagonal matrix with specific diagonal vectors

Assuming the output matrix is square and N by N, this is what I would do. Assume N=4, and I'd like to set the -1 diag to [1,2,3...

Creating a diagonal matrix with specific diagonal vectors

Assuming the output matrix is square and N by N, this is what I would do. Assume N=4, and I'd like to set the -1 diag to [1,2,3...

6 months ago | 0

Question

How do I convert a complex ss model to a real ss model

If I have a state space model something like A = [-0.005+sqrt(2)*1i 0 ; 0 -0.005-sqrt(2)*1i]; B = [ -1+1i -1-1i]; ...

6 months ago | 0 answers | 0

Answered

Is there a function for argmax?

function y = argmax(x) [~,y] = max(x); end

Is there a function for argmax?

function y = argmax(x) [~,y] = max(x); end

10 months ago | 0

Question

Centos 7 Install: Help not working right

I have just installed MATLAB 2019a over Centos for the first time. Help is not working as I expect. When I type help, I get hel...

1 year ago | 1 answer | 0

Question

arrayfun isreal fails - how to fix?

x = randn(8,1); z = fft(x); assert(isreal(z(1)),'First'); y = arrayfun(@isreal,z); assert(y(1),'Second'); In this snippet, ...

1 year ago | 2 answers | 2

Answered

how to constrain tfest to give minimum phase zeros

init_sys = idtf([NaN NaN NaN],[1 NaN NaN NaN]); init_sys.Structure.num.Minimum = 0; init_sys.Structure.den.Minimum = 0; ...

how to constrain tfest to give minimum phase zeros

init_sys = idtf([NaN NaN NaN],[1 NaN NaN NaN]); init_sys.Structure.num.Minimum = 0; init_sys.Structure.den.Minimum = 0; ...

4 years ago | 0

Question

how to constrain tfest to give minimum phase zeros

I am trying to apply the MATLAB ident toolbox function "tfest" to some data. It is returning a non-minimum phase zero, yet I get...

4 years ago | 1 answer | 0

Question

How to get good sys ids using n4sid

I have a test problem to try out the n4sid function in the System Identification Toolbox. I have simulated a simple SISO sec...

5 years ago | 0 answers | 0

Question

Use a network license if it is available

I have worked out how to combine my Individual Standalone Named User license with a Network Concurrent User license from a serve...

5 years ago | 0 answers | 0

Question

Combining standalone license with network license. Using offline.

I would like to use my standalone copy of MATLAB with some Toolboxes for which we have a network license. I installed MATLAB usi...

8 years ago | 1 answer | 0

Question

Fonts that work correctly

I have been playing around, in MATLAB 2012b, with setting the fonts in a Figure. I have done this both under OS X and Windows 7,...

8 years ago | 2 answers | 0

Solved

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...

8 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...

8 years ago

Solved

The Goldbach Conjecture

The <http://en.wikipedia.org/wiki/Goldbach's_conjecture Goldbach conjecture> asserts that every even integer greater than 2 can ...

8 years ago

Solved

Who Has the Most Change?

You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

8 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...

8 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 + ...

8 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...

8 years ago

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...

8 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...

8 years ago

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...

8 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...

8 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...

8 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...

8 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...

8 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...

8 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...

8 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...

8 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...

8 years ago