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Last seen: Today Active since 2017

Programming in MATLAB applied to interdisciplinary engineering fields

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Answered
Plot measured Filter data
T = readtable('Plot.xls') frequency = T{(22:109),1}; % change this to ffequency gain = T{(22:109),2}; phase = T{(22:109),...

environ 7 heures ago | 0

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Answered
matlab indexing issue with range -pi:pi
amin=0.2; theta = -pi:pi/2:pi; gamma=0:0.5:3; for T=1:length(theta) for G = 1:length(gamma) phi=amin-(-pi/2); ...

environ 15 heures ago | 0

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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...

4 jours 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); ...

4 jours 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...

5 jours 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*...

6 jours 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))+...

7 jours 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...

9 jours 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...

10 jours 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

10 jours 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...

12 jours 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 ...

12 jours 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

12 jours 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...

12 jours 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...

13 jours 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...

19 jours 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)...

24 jours 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...

25 jours 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...

25 jours 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),...

26 jours 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 ...

26 jours 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)<...

26 jours 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...

27 jours 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...

27 jours 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...

27 jours 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...

28 jours 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...

28 jours 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...

28 jours 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

environ un mois 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 { } ...

environ un mois ago | 0

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