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"Z must be a matrix, not a scalar or vector." PLEASE HELP!

x1 = 1:.1:4; x2 = 1:.1:4; [X,Y] = meshgrid(x1,x2); Z= ps2func(X,Y); mesh(X,Y,Z) grid on hold on function [f]=ps2func(x...

"Z must be a matrix, not a scalar or vector." PLEASE HELP!

x1 = 1:.1:4; x2 = 1:.1:4; [X,Y] = meshgrid(x1,x2); Z= ps2func(X,Y); mesh(X,Y,Z) grid on hold on function [f]=ps2func(x...

environ 5 heures ago | 0

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Converting Euler's method calculation into matlab

tray this: % Initial conditions and setup Q=400; A=1200; alph=160; h = 0.5; % step size t = 0:0.5:10; % the range of t ...

Converting Euler's method calculation into matlab

tray this: % Initial conditions and setup Q=400; A=1200; alph=160; h = 0.5; % step size t = 0:0.5:10; % the range of t ...

2 jours ago | 1

| accepted

Answered

Lotka-Volterra Predatir Prey Model Code

using this: function [dPdt] = lotkavolterra(t,P) alpha = 1.5; % you have error here: you using alpa beta = 1; gamma = 3; de...

Lotka-Volterra Predatir Prey Model Code

using this: function [dPdt] = lotkavolterra(t,P) alpha = 1.5; % you have error here: you using alpa beta = 1; gamma = 3; de...

2 jours ago | 0

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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...

16 jours ago

Answered

¿Por qué mi código no corre?

Hola, Creo que tu condicion incial debe ser de solo dos elementos y no de tres. Intenta este programa principal, el cual llamará...

¿Por qué mi código no corre?

Hola, Creo que tu condicion incial debe ser de solo dos elementos y no de tres. Intenta este programa principal, el cual llamará...

23 jours ago | 0

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Triangle of numbers

Create a matrix with the integers from 1 to |n| arranged in a triangular shape. Every row |i| of the matrix contains |i| inte...

24 jours ago

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How do I plot a function that has been split into multiple time intervals

I don't know if I understand your problem, but I think it is related to the way to program the following code: t=-1:0.1:6; y...

How do I plot a function that has been split into multiple time intervals

I don't know if I understand your problem, but I think it is related to the way to program the following code: t=-1:0.1:6; y...

24 jours ago | 0

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Back to basics 2 - Function Path

Covering some basic topics I haven't seen elsewhere on Cody. Given a string that is the name of a MATLAB function, return a s...

25 jours ago

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Prime factor digits

Consider the following number system. Calculate the prime factorization for each number n, then represent the prime factors in a...

26 jours ago

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How do I display squares of all even integers from zero to some positive integer input by the the user.And the program must continuously request a number from the user untill a valid a positive integer is entered

M=input('enter integer:'); for c=0:M if mod(c,2)==0 c^2 end end

How do I display squares of all even integers from zero to some positive integer input by the the user.And the program must continuously request a number from the user untill a valid a positive integer is entered

M=input('enter integer:'); for c=0:M if mod(c,2)==0 c^2 end end

28 jours ago | 0

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hi I am trying to calculate the 4th root of the function f(x)=3x4+7x3−4x2−10x+15 using newtons method and a for - loop

clear clc close all % function f = @(x) 3*x.^4 + 7*x.^3 - 4*x.^2 - 10*x + 1/5; % derivative df = @(x) 12*x.^3 + 21*x.^2...

hi I am trying to calculate the 4th root of the function f(x)=3x4+7x3−4x2−10x+15 using newtons method and a for - loop

clear clc close all % function f = @(x) 3*x.^4 + 7*x.^3 - 4*x.^2 - 10*x + 1/5; % derivative df = @(x) 12*x.^3 + 21*x.^2...

28 jours ago | 0

Answered

Making combinations using random number generators

N=input('give me number of random elements:'); a=input('lower limit of the numbers to generate:'); b=input('upper limit of the...

Making combinations using random number generators

N=input('give me number of random elements:'); a=input('lower limit of the numbers to generate:'); b=input('upper limit of the...

29 jours ago | 0

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Answered

How to create a noisy signal for wavelet transform practice?

maybe this code will help you N=1000; x=linspace(0,2*pi,N); y=sin(x); y2=randn(1,N); y3=y+y2*.1; subplot(2,1,1);plot(x,y)...

How to create a noisy signal for wavelet transform practice?

maybe this code will help you N=1000; x=linspace(0,2*pi,N); y=sin(x); y2=randn(1,N); y3=y+y2*.1; subplot(2,1,1);plot(x,y)...

environ un mois ago | 1

| accepted

Solved

Given a matrix A return a vector of the product of the elements in each column using a loop without using prod.

--------------------- for m: 3 1 3 3 10 1 9 1 9 4 1 4 5 6 5 ...

environ un mois ago

Solved

Product of Each Column

Given a matrix |mat| with |n| columns, return a row vector |v| of length |n|, where every element in |v| is the product of the |...

environ un mois ago

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Replace Nonzero Numbers with 1

Given the matrix x, return the matrix y with non zero elements replaced with 1. Example: Input x = [ 1 2 0 0 0 ...

environ un mois ago

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Euler's Method

for n = [10, 20, 40, 80, 160] a = 0; b = .5; c = .25; x = linspace(a,b,n);%[a:n+1:b]; f = x.^3; dx = x(...

Euler's Method

for n = [10, 20, 40, 80, 160] a = 0; b = .5; c = .25; x = linspace(a,b,n);%[a:n+1:b]; f = x.^3; dx = x(...

environ un mois ago | 0

Answered

plotting for cosine wave

I change some lines.... N=45; theta=0:360; % range of values of theta Na1=2*N*cosd(theta); % cosd for cos when you use de...

plotting for cosine wave

I change some lines.... N=45; theta=0:360; % range of values of theta Na1=2*N*cosd(theta); % cosd for cos when you use de...

environ 2 mois ago | 0

Answered

Solving a simple integral with input equation from user

syms x str = input('Enter an equation in x: ','s') ; f = function_handle.empty; f = eval(['@(x)', str]); %x = f(); xmin= ...

Solving a simple integral with input equation from user

syms x str = input('Enter an equation in x: ','s') ; f = function_handle.empty; f = eval(['@(x)', str]); %x = f(); xmin= ...

environ 2 mois ago | 1

| accepted

Solved

Area of a pentagon

Given the side of a regular pentagon and its apothem return the area of pentagon. Remember the area of pentagon is calculate ...

environ 2 mois ago

Solved

Find the area of the square

There are *n²* circles inscribed in the square ABCD. The perimeter of each circle is *aπ* <<http://imgfz.com/i/3wzCeAT.png>> ...

2 mois ago

Solved

Times 5

Try out this test problem first. Given the variable x as your input, multiply it by five and put the result in y. Examples...

2 mois ago

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Times 10

Try out this test problem first. Given the variable x as your input, multiply it by ten and put the result in y. Examples:...

2 mois ago

Solved

Doubling elements in a vector (★★)

(copy of prob. 1024) Given the vector A, return B in which all numbers in A are doubling. So for: A = [ 1 5 8 ] t...

2 mois ago

Solved

Mo money, mo math #2! (★★★)

(adapted from Prob 9 Cody team) You have a matrix for which each row is a person and the columns represent the number of quar...

2 mois ago

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Sum of terms in a series 1 (★★★)

Given x and n, compute the following sum: |x|+|x|^(1/2)+|x|^(1/3)+|x|^(1/4)+|x|^(1/5) ... + |x|^(1/n) where ||x|| indica...

2 mois ago

Solved

Sum 1 to 100 even number

Write a Matlab program to add all the even numbers from 0 to 100 |

2 mois ago