# Akhtar Jan

### UET Peshawar KP Pakistan

PhD. Scholar in Mathematics

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**Content Feed**

Question

where is the fault the code is not running as it has two delays with four variables?

function sol = exam4 options = ddeset('Events',@exam4e); sol = dde23(@exam4f,[1, 10],[5; 0.1; 1],[0, 40],options); xe = sol.x...

1 month ago | 1 answer | 0

### 1

answerQuestion

How can I draw a bifurcation diagram for the given code?

clc close all k1 = 3; k_1 = 1; k2 = 2.5; k3 = 1; k_3 = 1; k4 = 2; k5 = 1; E1 = 1; E2 = 2; K1 = (k_1+k2)/k1; K2 = (k_...

1 month ago | 1 answer | 0

### 1

answerQuestion

How to plot the solution?

clc close all syms L e = exp(sym(1)); lags = 0; k1 = 3; k_1 = 1; k2 = 2.5; k3 = 1; k_3 = 1; k4 = 2; k5 = 1; E1 = 1; ...

2 months ago | 1 answer | 0

### 1

answerQuestion

where is the fault the code is not running?

clc close all lags = 0.6; k1 = 3; k_1 = 1; k2 = 2.5; k3 = 1; k_3 = 1; k4 = 2; k5 = 1; E1 = 1; E2 = 2; K1 = (k_1+k2)/...

2 months ago | 1 answer | 0

### 1

answerQuestion

How to find L from the given code?

clc close all lags = 0.6; k1 = 3; k_1 = 1; k2 = 2.5; k3 = 1; k_3 = 1; k4 = 2; k5 = 1; E1 = 1; ...

2 months ago | 2 answers | 0

### 2

answersQuestion

I want to draw a bifurcation diagram for system of four delay differential equations

clc lags = 0.6; sol = dde23(@ddex1de,lags,@ddex1hist,[0,8]); t = sol.x; y = sol.y; plot(t,y(1,:)); function dydt = ddex1de...

3 months ago | 0 answers | 0

### 0

answersQuestion

How can I run this code I don't know where is the fault?

clc close all clf k1 = 2; k_1 = 1; k2 = 1; k3 = 2; k_3 = 1; k4 = 1; St = 100; K1 = (k_1+k2)/(k1*St); K2 = (k_3+k4)/(k...

6 months ago | 1 answer | 0

### 1

answerQuestion

how can i run this code need help?

%its about Solving PDEs by Asymmetric MQ Collocation the above code is already given in the book which %i have %pasted below ...

7 months ago | 1 answer | 0

### 1

answerQuestion

I want to run this code?

shape = 2.5; N = 30; Np = N^2; [X,Y] = meshgrid(linespace(0,1,N),linespace(0,1,N)); x = reshape(X,N^2,1); y = reshape(Y,N^2...

7 months ago | 1 answer | 0

### 1

answerQuestion

How can I plot the the graph of Hill Equation for cooperativity Velocity vs. Substrate concentration in MATLAB

k1 = 3 k_1 = 1; k2 = 3; k3 = 0.6; k_3 = 1; k4 = 3; E0 = 2; K1 = (k_1+k2)/k1; K2 = (k_3+k4)/k3; (k2*K2+k4.*S(i))*E0.*S(i...

9 months ago | 1 answer | 0

### 1

answerQuestion

How can I add Direction arrows in this Phase Portrait I mean arrows in the Direction of velocity

clear clc clf close all k1 = 3; k_1 = 1; k2 = 3; k3 = 0.6; k_3 = 1; k4 = 3; f = @(t,a) [k_1*a(2)-k1*a(1)-k3*a(1)*a(...

9 months ago | 1 answer | 0

### 1

answerQuestion

How can I plot the graph of three non-linear coupled ODE's vs. time in xy-plane in MATLAB. I want to use x-axis for time while y axis for x(1),x(2),x(3) thanks

My ODE's are: k_1*x(2)-k1*x(1)-k3*x(1)*x(2)+k_3*x(3); k1*x(1)-(k_1+k2)*x(2)-k3*x(1)*x(2)+(k4+k_3)*x(3); k3*x(1)*x(2)-(k4+k_3)...

10 months ago | 1 answer | 0

### 1

answerQuestion

How can i draw the phase portrait in my code for 3 non-linear coupled ODEs in 3D plane

function SC1C2 clear clc clf close all %==== parameters ===== k1 = 1.5; k_1 = 0.5; k2 = 1; k3 = 2; k_3 = 1; k4 =...

10 months ago | 1 answer | 1