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Peter O


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228 total contributions since 2011

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Answered
What is the difference between in64, int32, and int8. Are there anymore 'int' functions? (int means integer right?)
Difference between %d, %f, or any other %? These are formatting control codes. %d prints a number in decimal (base 10) format, ...

7 months ago | 0

| accepted

Answered
How to display a Y value
For interactive use of the graph, consider use of the datatips functionality. In R2018 and above, if you hover your cursor over ...

7 months ago | 0

| accepted

Answered
index exceeds matrix dimensions and the toolbox code error
I'd guess that n is larger than the size of P. In the first couple lines it seems that P only gets allocated if the swing angle ...

7 months ago | 0

Answered
How to apply modifiers to error messages
You've almost got it. The TeX formatting is correct. You need to include the interpreter and modality of the window in a struct ...

7 months ago | 1

| accepted

Answered
How to impulse response including unit step function
The Heaviside step function is defined Substitute a logical check on t for u(t). Should be extendable to a shifted step fu...

7 months ago | 0

Answered
How Do I Determine which Group Variables Correspond to the Results of SplitApply
Consider using the second argument output from findgroups? [G,ID] = findgroups(A) also returns the unique values for each group...

7 months ago | 0

| accepted

Answered
Incorporate Incremental Vector into an Equation
Use the elementwise operators (preceed divide/multiply with a dot). https://www.mathworks.com/help/matlab/matlab_prog/array-vs-...

7 months ago | 0

Answered
count of non zero elements of a row vector in a loop
Try the nnz function. It sounds like you're trying to count the number of nonzero elements in each row? Use arrayfun to apply t...

7 months ago | 1

| accepted

Answered
Using CLEAR ALL usually decreases code performance and is often unnecessary
It sounds like you're seeing this in the Editor's Linter coding tips? These are all "clear the slate" commands, Use clc to clea...

7 months ago | 0

Answered
Can I use boolean of a variable on a column of another variable
Hi, to confirm/rephrase, you're looking to extract 16 separate arrays, each one corresponding to the case where the response mat...

7 months ago | 0

Answered
How To Assign Operator/Variables with a value
I'm not familiar with LGP. Consider a cell array to hold the chromosome? C = {X, 2, @times, 4} Using the operator definition...

7 months ago | 0

Answered
Creating a vector from recursive elements of another vector
Welcome to MATLAB! Matlab will allocate the memory for you on the fly, so this is a one line operation, no need for a loop :) ...

7 months ago | 0

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Solved


Rosenbrock's Banana Function and its derivatives
Write a function to return the value of <http://en.wikipedia.org/wiki/Rosenbrock_function Rosenbrock's two-dimensional banana fu...

8 months ago

Solved


Permutation Via Multiplication
Given two numbers a and b, determine if the product ab is a permutation of the digits of a. For example, this is always true for...

8 months ago

Solved


Whole Number Un-Concatenator
Write a function that accepts an integer and an index digit and returns a vector containing two integers which are the leading a...

8 months ago

Solved


Whole Number Concatenator
Write a function that concatenates whole numbers. For example: numcat(111,222) should return 111222 numcat(1,2,3,4,5) s...

8 months ago

Solved


Find the maximum number of decimal places in a set of numbers
Given a vector or matrix of values, calculate the maximum number of decimal places within the input. Trailing zeros do not coun...

8 months ago

Solved


Make roundn function
Make roundn function using round. x=0.55555 y=function(x,1) y=1 y=function(x,2) y=0.6 y=function(x,3) ...

8 months ago

Solved


Rounding off numbers to n decimals
Inspired by a mistake in one of the problems I created, I created this problem where you have to round off a floating point numb...

8 months ago

Solved


Matlab Basics - Rounding III
Write a script to round a large number to the nearest 10,000 e.g. x = 12,358,466,243 --> y = 12,358,470,000

8 months ago

Solved


Matlab Basics - Rounding II
Write a script to round a variable x to 3 decimal places: e.g. x = 2.3456 --> y = 2.346

8 months ago

Solved


Check that number is whole number
Check that number is whole number Say x=15, then answer is 1. x=15.2 , then answer is 0. <http://en.wikipedia.org/wiki/Whole...

8 months ago

Solved


MATLAB Basic: rounding IV
Do rounding towards plus infinity. Example: -8.8, answer -8 +8.1 answer 9 +8.50 answer 9

8 months ago

Solved


MATLAB Basic: rounding III
Do rounding towards minus infinity. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 8

8 months ago

Solved


MATLAB Basic: rounding II
Do rounding nearest integer. Example: -8.8, answer -9 +8.1 answer 8 +8.50 answer 9

8 months ago

Solved


MATLAB Basic: rounding
Do rounding near to zero Example: -8.8, answer -8 +8.1 answer 8

8 months 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.

8 months ago

Solved


Magic is simple (for beginners)
Determine for a magic square of order n, the magic sum m. For example m=15 for a magic square of order 3.

8 months ago

Solved


Make a random, non-repeating vector.
This is a basic MATLAB operation. It is for instructional purposes. --- If you want to get a random permutation of integer...

8 months ago

Solved


Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

8 months ago

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