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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;

9 years ago

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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

9 years ago

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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...

9 years ago

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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 ...

9 years ago

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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...

9 years ago

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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...

9 years ago

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ESEMPIO
controllo uso funzioni

9 years ago

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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...

9 years ago | 0

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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...

9 years ago

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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....

9 years ago

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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)...

9 years ago | 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...

9 years ago

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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.

9 years ago

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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...

9 years ago

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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 ...

9 years ago

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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:...

9 years ago | 0

Problem

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...

9 years ago | 0 | 46 solvers

Answered
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,:);

9 years ago | 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 ...

9 years ago

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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.

9 years ago

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

9 years ago

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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)

9 years ago

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

9 years ago

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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...

9 years ago

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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 ...

9 years ago

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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...

9 years ago

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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...

9 years ago

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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 ...

9 years ago

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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...

9 years ago

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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.

9 years ago