# Guoyi Xu

### MathWorks

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**Content Feed**

Solved

Sum the rows

Sum the rows of the given matrix. Example x = [ 1 2 3 4 ] y = [ 3 7 ]

11 månader ago

Solved

Find the missing numbers.

Total *N* numbers are in the series of natural numbers ( *1,2,3,...,N* ). The input is an array (unsorted) of those natural num...

11 månader ago

Solved

Make an identity matrix whose diagonal elements are 1:n

For a given input n, make an n by n identity matrix that contains the elements 1:n along its diagonal. For example, if input=5: ...

11 månader ago

Solved

Increment up an input vector

Increment up an input vector by adding the indices to the vector values. For example, if an input vector is [3, 2, 6, 1, 6], the...

11 månader ago

Solved

Calculating the total earnings of a factory

The row vector, prods contains the number of various products manufactured per hour. The second row vector, prices holds values ...

11 månader ago

Solved

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 ...

11 månader ago

Solved

what's my tax amount this year ?

given an annual salary x and a tax rate i calculate the amount that you have to pay.Example x = 70000; i=.10 y_correc...

11 månader ago

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short or buy ? take the opportunity

you had already calculated a theoretical stock value, now you checked in bloomberg the quoted price of that stock and you have t...

11 månader ago

Solved

Slope of the line passing through two points

Determine the slope of a line passing through the points a=[x1 y1] and b=[x2 y2].

11 månader ago

Solved

I told you not separate me, but you did :( - ACDC

Given input vector, output it's DC and AC value Example: input = 0 1 -1 0 ac = 0 1 -1 0 dc = 0

11 månader ago

Solved

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...

11 månader ago

Solved

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 ...

11 månader ago

Solved

Calculate cosine without cos(x)

Solve cos(x). The use of the function cos() and sin() is not allowed.

11 månader ago

Solved

currency converter

given a rate of exchange calculate the equivalent units of 100 USD

11 månader ago

Solved

Create a square matrix with given conditions

Create a square matrix, M, which should be populated as follows: M = [ n^2 n * (n-1) n * (n-2) ... n * 2 n * ...

11 månader ago

Solved

Delete x value in given vector y.

Delete x value in given vector y. Exapmle x=5; y=[ 1 2 5 6 74 5 2 5] result=[1 2 6 74 2]

11 månader ago

Solved

Set x value to each odd index of vector y.

Set x value to each odd index of vector y.

11 månader ago

Solved

Modulation index

The amplitude of the carrier signal is 2V and the amplitude of the modulating signal is 8V. Find its modulation index.

11 månader ago

Solved

Solve expression II

Solve given expression. alpha=0.1(-x-y-50)/(exp((-x-y-50)/10)-1) beta=5exp((-x+y-60)/20) result=alpha+beta;

11 månader ago

Solved

Solve expression I

Solve expression (1+sin(x))/cos(x)+cos(x)/(1+sin(x)) for given vector x.

11 månader ago

Solved

For a rectangle, if x is the length and 2x is width. Then find out x from the area of the rectangle?

For a rectangle, if x is the length and 2x is the width. Then find out x from the area of the rectangle? if the area is equal...

11 månader ago

Solved

Sum positive elements of matrix.

Calculate sum of positive elements of the matrix.

11 månader ago

Solved

Find sum of negative elements in row.

Find sum of negative elements in row. Example x=[1 -5 3 4 -6 6 7 8 9 10] result = -11

11 månader ago

Solved

Implement zero-based indexing for Matrices

Given an input vector and position (which is zero based) output the value Example: x = [1 2; 4 5] pos = [0 1] value = 5 ...

11 månader ago

Solved

Create tangent function out of sine function only

Please don't use cosine and tangent functions

11 månader ago