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Basic commands - Least common multiple
Make a function which will return least common multiple of "a" and "b" Example: a=8; b=6; y=24;

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Change string to number
Change given string to number. (hint: there is already function) Changing from ['1234'] to [1234] is one of example

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Resort number using given index!
Resort matrix [a] using given index [b]. For example, if a=[2 5 3 5]; b=[4 1 2 3]; , the result is [5 2 5 3]. (hint: y...

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Sort matrix a according to ascending order of B!
To be specific, A=[9 3 1 3] B=[1 3 2 4] are provided, ascending sorting of B is [B(1) B(3) B(2) B(4)]. Thus ...

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Extract a part of matrix!
There is matrix A A=[1 2 3; 4 5 6; 7 8 9] Extract a part of matrix A from (2,2) to (3,3). Result should...

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Calculate solution of given polynomial
For example, y=function([3 -2 -4]) In here, input vector indicate 3*x^2-2*x-4, y is solution of former equation. y=[1.5...

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ESEMPIO
controllo uso funzioni

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Respondida
Fitting experimental data to find a function
You can try polyfit function or other curve fit function, i.e. nlinfit or lsqcurvefit,to find proper equation. you also use cft...

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i forgot to use capital I
When referring to yourself you should write "I" (capital) and not "i". So correct the input string x, but be aware that other u...

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Bubble sort
Write your own bubble sort function ( <https://en.wikipedia.org/wiki/Bubble_sort>) to sort all elements in x in ascending order....

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Loop backwards and select subset of rows that meet criteria
if you want to use loop, it is showed below: tindex = find(A(:,1)==t); for j = tindex:-1:2 if(A(j,1)-A(j-1,1)==1)...

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extract part elements of matrix into one new matrix
Given a matrix, includes different elements(plus, minus and zero), extract the nonzero elements and form a new matrix. for examp...

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Find hen's weight.
If hen weights x kilos on two legs, how much does it weights on one leg? Output the result.

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Avengers Assemble!
Given matrix with so many zeroes, trim those zeroes and output a matrix joining all nnz elements Example: input = [0 0 0 0 0...

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Finding two missing number in 1 to n array
You are given an array of numbers from 1 to n with two missing numbers. Return the two missing numbers. Input: x=[5 2 0 1 ...

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Replace rows with NaN only if there are more than two continous zero values in the same column
First, you can find the column with continous zeros(more than two), then find the index for replacement with nan. for example:...

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Problema

extract part elements of matrix into one new matrix
Given a matrix, includes different elements(plus, minus and zero), extract the nonzero elements and form a new matrix. for examp...

casi 10 años hace | 0 | 48 solvers

Respondida
Loop backwards and select subset of rows that meet criteria
you can solve it without loop, e.g B = find(diff(A(1:find(A(:,1)==t),1))~=1); result = A(B(end)+1:find(A(:,1)==t)-1,:);

casi 10 años hace | 0

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Remove all the columns contains only zero
Remove the column from the matrix which has only zeros . Refer the Example below a= 1 0 3 0 23 0 56 0 1 ...

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Calculate the hypotenuse of a right triangle without using ^ and sqrt ()
Find out the hypotenuse of right triangle. Say a = 4, b = 3 then c = 5 Please don't use ^ and sqrt() function.

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Solve cosine without cos(x)
Solve cos(x). The use of the function cos() and sin() is not allowed.

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Solve sin(x) without sin(x)
Calculate y = sin(x) x = 0 -> y= 0 without the use of sin(x) or cos(x)

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Create vector as shown in test cases
Create vector as shown in test cases

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Delete useless part of data
When someone deals with big data. if the person delete useless part, calculation will be more faster than before deleting. De...

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Modified run-length companion vector
Given a vector x, return a vector that indicates the run length of any value in x. Each element in output vector shows how many ...

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Find index of a string in a cell array
Write a function that finds the index at which the cell array of strings C contains the exact string S. So if C = {'twe...

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Clipper Function
Create a function that emulates a clipper circuit Given sin wave, t and the constant value for clipping, and the direction to re...

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Make equation that can express relationship!
Observed data [y] that vary with [x]. Unfortunately, [y] including small amount of errors. x=[1 2 3 4 5 6] y=[2.16 4.97 ...

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Removing vibration!
There are [y] that vary with [x] but y including small useless vibration. x=1:10 y=[1.71 2.03 3.28 4.05 5.10 6.82 7.69 8.3...

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Make 3d matrix from other matrix
A=[1 1;2 2]; B=[2 2;3 3]; C=[0 0;1 3]; Using given three matrix, make 3 dimensional matrix [D] by stacking.

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