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...

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;...

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

| accepted

Answered

creating multiple values of the same x,y,z

x=[ 2, 4, 2]; repmat(x,10,1)

creating multiple values of the same x,y,z

x=[ 2, 4, 2]; repmat(x,10,1)

7 months ago | 0

| accepted

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(...

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

| accepted

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)));

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

| accepted

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

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);

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 ...

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

Answered

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...

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...

"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 ...

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

| 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...

9 months ago | 0

| accepted

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...

¿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

Solved

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...

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

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

10 months ago | 0

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...

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

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...

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)...

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

| 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 ...

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(...

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