# xiexiezaijian

A USTCer major in physics and do the research with the help of MATLAB.

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Solved

ASCII Birthday Cake

Given an age and a name, give draw an ASCII birthday cake. For example, given the name "CODY" and the age 5, return a string wit...

nästan 5 år ago

Solved

Pentagonal Numbers

Your function will receive a lower and upper bound. It should return all pentagonal numbers within that inclusive range in ascen...

nästan 5 år ago

Solved

Energy of a photon

Given the frequency F of a photon in giga hertz. Find energy E of this photon in giga electron volts. Assume h, Planck's ...

nästan 5 år ago

Solved

How to subtract?

* Imagine you need to subtract a few numbers using MATLAB. * You will not be using eval for this task. * Given two ASCII strin...

nästan 5 år ago

Solved

Quote Doubler

Given a string s1, find all occurrences of the single quote character and replace them with two occurrences of the single quote ...

ungefär 5 år ago

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Which doors are open?

There are n doors in an alley. Initially they are all shut. You have been tasked to go down the alley n times, and open/shut the...

ungefär 5 år ago

I have a column cell array "teste1" and I want to create "teste2": if "teste1" is not 0, I want a 'V'; if "teste1" is 0, I want to compare 2 other different string cells and the result would be from 1 to 5 (or 0, if no condition was satisfied)

I think the problem is in these lines: if teste2(:)~=0 teste2(:)='V'; but I get really confused about what you want...

nästan 6 år ago | 1

How to draw the collision of two ball with Matlab?

I think using these built-in functions will help: 1. handle01 = plot([X1,X2],[Y1,Y2],'.','MarkerSize',10);% draw two points t...

nästan 6 år ago | 2

| accepted

Please I need help in MATLAB!!

since no loops and no bin2dec, this work could be done using the definition of binary number and vecterization operation. Take b...

nästan 6 år ago | 1

How to do it?

I see, if no boundary, it will be easy with the help of built-in functions: 1. [x,y] = meshgrid(input arguments)% get the mes...

nästan 6 år ago | 1

Solved

Special matrix

Make a square matrix with this shape. For n=4 M = 1 1 0 0 1 0 1 0 0 1 0 ...

nästan 6 år ago

Solved

What is the distance from point P(x,y) to the line Ax + By + C = 0?

Given a point, P(x,y), find the distance from this point to a linear line. INPUTS: x, y, A, B, C OUTPUTS: d, the distance ...

nästan 6 år ago

Solved

What is Sum Of all elements of Matrix

Given the matrix x, return the sum of all elements of matrix. Example: Input x = [ 1 2 0 0 0 0 6 9 3 3 ] ...

nästan 6 år ago

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Simple date to serial no. conversion

Convert a date string to a serial date number. For example if you take x='19-May-2001' then the result is 730990 x...

nästan 6 år ago

Solved

Volume of a sphere given its surface area

You just measured its surface area, that is the input.

nästan 6 år ago

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subtract central cross

Given an n-by-n square matrix, where n is an odd number, return the matrix without the central row and the central column.

nästan 6 år ago

Solved

Create an index-powered vector

Given a input vector x, return y as index-powered vector as shown below. Example x = [2 3 6 9] then y should be [...

nästan 6 år ago

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Matrix of almost all zeros, except for main diagonal

Write a program to input an integer n and build a n-by-n matrix with the numbers 1,2,...,n on the main diagonal and zeros elsewh...

nästan 6 år ago

Solved

Is My Wife Wrong?

Answer the question. (see also <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right Problem 149: Is my ...

nästan 6 år ago

Solved

Square a Number

Given an input x, return y, which is equal to the square of x.

nästan 6 år ago

Solved

Multiples of a Number in a Given Range

Given an integer factor _f_ and a range defined by _xlow_ and _xhigh_ inclusive, return a vector of the multiples of _f_ that fa...

nästan 6 år ago

Solved

root?

* Given a function 'foo', and a position 'there', find the root near 'there'. * For example: If foo=@sin, and there=3.1, then r...

nästan 6 år ago

Solved

Getting the indices from a matrice

Getting the indices from a matrice. Inspired by Problem 645. Getting the indices from a vector by the great Doug Hull. Given a...

nästan 6 år ago

Solved

Vector of numbers divisible by 3

* Input(n) - any integer * Output(v) - vector with numbers divisible by 3(exept 0) starting from n to 0 Examples: * n=6...

nästan 6 år ago

Solved

Relative ratio of "1" in binary number

Input(n) is positive integer number Output(r) is (number of "1" in binary input) / (number of bits). Example: * n=0; r=...

nästan 6 år ago

Solved

Half-Swap

Given a vector with an even number of elements, rearrange it so that the elements in its first half are switched with those i...

nästan 6 år ago

Solved

Elapsed time is -0.005204 seconds.

Write a function that takes less than zero seconds to execute, as measured using tic and toc. For repeatability, the test case p...

nästan 6 år ago