Answered
Euler method returning error
maybe you need copy the function eulsys.m in your system. In this link you have a copy: http://macs.citadel.edu/chenm/344.dir/0...

7 months ago | 0

Answered
how do i plot only certain part of cepstrum
KSSV ks suggests that you work with the index, here I show you an example of what KSSV mentions, x=linspace(0,10,100); y=x.^2;...

7 months ago | 0

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Answered
creating multiple values of the same x,y,z
x=[ 2, 4, 2]; repmat(x,10,1)

7 months ago | 0

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Answered
no data plots on graph (plot (x,y))
David is correct. Why don't you try something like that in your code... d(1) = 32000; H = 8000; Re = 6370000; %c2 = 0.5*exp(...

7 months ago | 0

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Answered
Invalid syntax error with a simple code
tray this x = [-2 -1.5 -1 -0.5 0 0.5 1 1.5 2]; y = (x+x.*(sqrt(x+3))).*(1+2*(x.^(2)));

8 months ago | 0

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Answered
How can I obtain slope of a trend line calculated for a time serie
Maybe this is useful for you https://www.mathworks.com/help/matlab/ref/detrend.html

8 months ago | 0

Solved


Find the repeating elements and repetitions of a row vector.
So let's say that x is a vector, for example, x = [4, 4, 5, 5, 5, 6, 7, 7,8, 8, 8, 8] Now we want to get the following two ve...

8 months ago

Answered
Why does my plot not appear?
Vmax = 354*10^(-6); Km = 1.5*10^(-3); S = .0000005:.0000005:.000030; v = Vmax*S./(Km + S); plot(S,v);

8 months ago | 0

Answered
Multiple Iterations over a system of linear equations
I think the problem is where the plot function, maybe you need to put another command to plot in each iteration, something like ...

8 months ago | 0

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for loop and if-statement
This may help you Time=[0.5 1.51 2.6 3.65 4.71 6.8 7.9 9.1 10.3 11.1 12.3 15 16.2 17.3 18.5 19.6]; dife=diff(Time); heelstrik...

8 months ago | 0

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Solved


Vertical matrix sort
Given a matrix x with n rows and m columns, return a matrix y with 2n rows and m columns, such that every column in x is sorted ...

9 months ago

Solved


Diagonal Pattern
For a positive integer |n|, return an |nXn| matrix |mat| such that the value of each element in row |i| and column |j| is given ...

9 months ago

Answered
"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...

9 months ago | 1

Answered
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 ...

9 months ago | 1

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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...

9 months 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...

9 months 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...

10 months 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...

10 months ago

Answered
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...

10 months ago | 0

Solved


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...

10 months ago

Solved


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

10 months ago

Answered
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...

10 months ago | 0

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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...

10 months 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)...

10 months ago | 1

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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 ...

10 months 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 |...

10 months ago

Solved


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 ...

10 months ago

Answered
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(...

10 months ago | 0

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