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Programming in MATLAB applied to interdisciplinary engineering fields

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Answered
phase shift using xcorr
t = 1 :0.1: 20; phaseshift= pi/2; s1 = sin(2*t); s2 = sin(2*t+ phaseshift); figure(1); clf; plot (t...

7 hours ago | 0

Answered
I am trying to find the integral gain (ki) of the following transfer function.
syms ki ki = 10 % e.g numeric values , not symbolic sys = tf([30.672 175.694*ki],[1 38.672 175.694*ki]); S = stepinfo(sys); ...

8 hours ago | 0

Answered
Hold on with subplot in a loop
A={[40;50;60] [70;80;90] [20;30;50]}; B={[45;55;65] [75;85;95] [25;35;55]}; T=[1;2;3]; figure(1) % use this outside of l...

2 days ago | 0

Answered
Question about the inability to display 16k octave bands(1/3 oct band)?
if fs==22050 fc=1000*2.^((-6:1:2)); fctxt={'16','32','63','125','250','500','1k','2k','4k'}; else fc=1000*...

3 days ago | 1

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Answered
Error using FDE12
s = 1:4; % define s vector passed as argument to function line below e.g. values sdot = @(t,s)[A-(e*s(1)*s(2))-(a*s(1)*s(3))+...

4 days ago | 0

Answered
An error in my code
clear syms x % syms F= atan(x); t5= taylor(F,x,'order',5); t7= taylor(F,x,'order',7); fplot(x^3/3+x,[-pi pi],'b') hold o...

5 days ago | 2

Answered
I do some revisions to my equation but I still got no answer. It says that there is no enough input argument. Can someone please help me?
x0=[150;150;150;150;150;150;150]; % x = 1:7; % give input vector to fucntion sol=fsolve(@rle,x0) % call the function using fu...

6 days ago | 0

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Answered
Pcolor Plot returning error Color data input must be a matrix.
h = pcolor(X1, Y1, z); % use X1, Y1 instead of x1 , y1, z must be 21x26 matrix

7 days ago | 0

Answered
how to plot solution of ODE eqution with out using fplot ?
% this code is used to show how to use ode in matlab, via a simple problem % for serios RC circuit with DC supply clc;clear a...

9 days ago | 1

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Answered
How can I store the whole diagonal and not only the first element (For loop)
% Part 3.1: Diagonal %A rng('default') r2 = randi(100,3,3); % Creating a 3x3 matrix, with random values from 1 to 100 %B ...

9 days ago | 0

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Answered
Why is ySol(t) = Dsolve(ode,cond) wrong? What should it be instead?
y=eval(ySol(t))% Use ySol(t) to evaluate

9 days ago | 0

Answered
Having trouble writing a multiple gravitational physics simulation code, as every planet effects one another.
a(q,:)=(sum(F(q:(q+o-1),:)))./mass(q); %Calculate acceleration of each planet v(q,:)=v(q,:)+a(q,:)*ts; %calula...

9 days ago | 0

Answered
Trouble graphing this non-linear function
x = 1:100; y = ((factorial(x)).^(1./x))./x; % use element wise division fplot(y,[0 100]) % no space between function and par...

9 days ago | 0

Answered
I am trying to a series generated from complex function but it gives to me an error.
clear; clc; syms k Delta=0; chi=0; theta=0; alpha=5; phi=0; bn=exp(-0.5*alpha^2)*(alpha^k)/sqrt(gamma(k+1)); bn1=exp(-0...

16 days ago | 0

Answered
using for loops to calculate compound interest with yearly contributions
N=17804; P=1000; C=1000; r=(10/100); I = 1; while P<=N y(I)=(P*(1+r)); % use an index for desired amount, P=y(I)...

20 days ago | 0

Answered
Semilogx function giving a linear scale
S = [1e-2 1e-1 1 10 100 1000 1e4]; % Remdesivir concentration, in uM Km = 0.5; % Equilibrium constant, in uM Vmax = 0.82; % ma...

21 days ago | 0

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Answered
Need help with syntax and how to use sigma in matlab
clear close all Z1=500 Z2=50 Z3=500 u=1 tau1=(2*Z2)/(Z1+Z2) tau2=(2*Z1)/(Z1+Z2) tau3=(2*Z3)/(Z3+Z2) p1=(Z2-Z1)/(Z2+Z1...

22 days ago | 1

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Answered
Unable to perform assignment because the size of the left side is 1-by-2 and the size of the right side is 2-by-2. (Line 32)
pp=@(t,x)[.23*x(1)-.0133*x(1)*x(2); -.4*x(2)+.0004*x(1)*x(2)] [t,y]=rk4sys(pp,[0,65],[550,20],0.3) figure(1) plot(t,y(:,1),...

22 days ago | 1

Answered
How to skip a data set in the legend of a plot?
clear; clc; clf; close all; x1 = [0.015 0.020 0.050 0.100 0.200 0.300 0.400 0.500]; y1 = [5.518E-11 7.215E-11 1.832E-10 ...

22 days ago | 1

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Answered
how to put for loop value into a vector
k = 0.168:0.168:1.68 ; for x=1:length(k) if k(x)>=0.03 && k(x)<=0.06 h(x)=1.437*k(x)^(-0.279); elseif k(x)>=0.07 && k(x)<...

23 days ago | 0

Answered
fplot invalid parameter error
m=100; k1=1500; k2=2500; k3=700; wb=4.4; Y=0.05; w1=sqrt(k1/m); w2=sqrt(k2/m); w3=sqrt(k3/m); r1=wb/w1; r2=wb/w2; r...

23 days ago | 1

Answered
Error with the command Geoplot
lat=cell2mat(A.Latitud);% if Latitud is the header name of column. Please check this. There Was extra parenthesis in my pr...

23 days ago | 0

Answered
Multiplying f(x) with f(-x)
cof = [1 15 7 2] syms x F(x) F = (cof(1)*x.^3+cof(2)*x.^2+cof(3)*x+cof(4)) FF = subs(F,x,-x) Fx = F.*FF % resulting produc...

24 days ago | 0

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Answered
Discontinuous display in Simulink Scope
Select the plot type as Auto in scope block. This plots the graph as continuous signals instead of discrete ones which you have...

25 days ago | 0

Answered
Why is my if counter not working
s= 0 x = linspace(-1,1, 50) n = linspace(1,10,50) L = 2 total = 0 s= zeros(size(n)) for i = 1:length(n) s(i) = (8/(p...

25 days ago | 0

Answered
I need to plot a graph of P, Rdia and Vo, please help me how to get graph. (for every 10 increment of pressure, there is 1 ohm increment of Rdia , and display the output vo)
Rdia = 3673; % dia resistance value in ohm ; Rtemp = 3618; % Temperature resistance value in ohm; R1 = 3600; % fixed resistanc...

25 days ago | 1

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Answered
Export results from several excel files into one excel file
Partikel_RL(xy,:)=Elementanzahl_RL(xy,:); % second for loop is not needed end

27 days ago | 0

Answered
Legend wont display lines properly in figure window
lgd = legend('Bundle','30% Opening','50% Opening', ... '65% Opening','85% Opening','100% Opening'); Use without a { } ...

30 days ago | 0

Answered
gamma function error in calculation
syms x a Y=sym(zeros(1)); Y(1)=0; a=1/2 for i=1:4 if i==5 A=1; B = 0; Y(i+1)=simplify((gamm...

1 month ago | 0

Answered
Function works with one input but not the other
F(2,:) = Thrust ./ MFR ; F(1,:) = (y .* A_choke) ./ MFR; Check the size of output matrix

1 month ago | 0

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