# lazymatlab

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Life is short. Matlab code is shorter.

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Solved

The Goldbach Conjecture, Part 2

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

4 months ago

Solved

Additive persistence

Inspired by Problem 2008 created by Ziko. In mathematics, the persistence of a number is the *number of times* one must apply...

4 months ago

Solved

Cell joiner

You are given a cell array of strings and a string delimiter. You need to produce one string which is composed of each string fr...

4 months ago

How to make a line in Mohrcircle

Because the center is fixed and the lines would pass the center (because it's Mohr's circle), all you need is either x value of ...

4 months ago | 2

Question

lookfor could not find polyfit using keyword 'polynomial' and 'fitting'.

I thought the function lookfor searches for the keyword given in the first line (referred as 'summary line' in the reference pag...

4 months ago | 1 answer | 2

### 1

answerHelp using fsolve (theta beta mach)

You do not need fsolve. Code below would be enough. num = M1^2 * (sin(beta))^2 - 1; den = M1^2 * (gamma + cos(2*beta)) ...

4 months ago | 0

Matlab memory optimization regarding output arguments

It depends. If the else block runs (y = x) in functieLocala, y shares x because it is just another name of same matrix. If leng...

4 months ago | 2

| accepted

스크립트의 함수 정의는 파일의 끝에 표시되어야 합니다. "preprocessMiniBatch" 함수 정의 뒤에 있는 모든 명령문을 첫 번째 로컬 함수 정의 앞으로 이동하십시오.

함수는 스크립트 중간에 정의될 수 없습니다. 코드 중 아래 부분을 스크립트 맨 뒤로 옮기고 실행해보세요. function X = preprocessMiniBatch(data) % Concatenate mini-ba...

4 months ago | 1

| accepted

출력 줄바꿈

fprintf를 쓰면 줄넘김 없이 출력할 수 있습니다. for i = 1:10 fprintf('%d ', i) end

7 months ago | 0

| accepted

Can you help me debug this code?

1. If you intended to make sensitivityAnalysis and monteCarloSimulation to be nested functions, the overall code should be also ...

8 months ago | 0

How to figure out "preview too large to be displayed" error while importing .mat file with import wizard

The preview pane on the Import Wizard window tries to show all the elements of selected matrix which may fail if it has too many...

8 months ago | 1

| accepted

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...

10 months ago

Defining Private and Public Fields within a Struct

As far as I know, matlab struct does not support access modifiers. Maybe you need to write a class which starts like this: cl...

10 months ago | 0

Why aren't my dashed lines working?

If 'Bell412' is the label of ConstantLine, you should write the line specifiers before the label. yline(1,'r--','Bell412')

10 months ago | 0

| accepted

애드온 툴박스 설치 시, 이 컴퓨터에서 실행 중인 MATLAB 세션이 있습니다. 라는 오류창

백그라운드에서 돌아가고 있는 매트랩 세션이 있지 않은지 확인해보세요. 작업관리자 - 세부정보에서 matlab.exe가 돌아가고 있다면, 강제종료 후에 설치해보세요.

10 months ago | 0

>> fun_f 입력 인수가 부족합니다. 오류 발생: fun_f (7번 라인) theta_d(1:n)=theta(n+1:2*n);

함수의 첫 줄은 함수의 입력과 출력을 선언하는 부분입니다. function theta_d=fun_f(t,theta) 위와 같이 작성된 함수는, 입력인자 2개(t, theta)를 받아서 함수 내부에서 theta_d를 계산한 뒤 ...

12 months ago | 0

fsolve 오류에 대한 질문

fsolve는 equation이 여러 개 있을 때 사용하며, equation이 하나일 때에는 fzero를 사용하는 것이 좋습니다. fzero는 지정한 초기값에서부터 방정식의 해를 찾아가는 방식인데, 주어진 F에 x=0을 대입하면 ...

12 months ago | 0

입력상수 부족문제 어떻게 해결해야하나요?

function이라는 키워드로 시작하는 함수의 첫 줄은 함수에 필요한 입력인자와 함수가 반환하는 출력인자를 정의합니다. 작성하신 코드의 첫 줄을 보면 function V = Poisson_FDM_Solver_2D(V, BC, ...

1 year ago | 1

| accepted

Question

I want to turn on/off dependency of two class properties based on the third property.

I made a class "rect" for rectangle, with independent properties width, height and fix_aspect_ratio. What I want to do is: If ...

1 year ago | 1 answer | 0

### 1

answerSolved

Return a list sorted by number of occurrences

Given a vector x, return a vector y of the unique values in x sorted by the number of occurrences in x. Ties are resolved by a ...

1 year ago

Solved

Counting Sequence

Given a vector x, find the "counting sequence" y. A counting sequence is formed by "counting" the entries in a given sequence...

1 year ago

Solved

Vector creation

Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

1 year ago

Solved

Doubling elements in a vector

Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] then B = [ 1 1 5 ...

1 year ago

Solved

Flip the vector from right to left

Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

1 year ago

Solved

Whether the input is vector?

Given the input x, return 1 if x is vector or else 0.

1 year ago

Solved

Get the length of a given vector

Given a vector x, the output y should equal the length of x.

1 year ago