Answered

ode45 with two 2nd order differential equation

<https://de.mathworks.com/help/symbolic/odetovectorfield.html>

ode45 with two 2nd order differential equation

<https://de.mathworks.com/help/symbolic/odetovectorfield.html>

2 months ago | 1

Answered

Solve a system of odes where equations are derived from a separate code (not directly given) using syms function

Hi, have a read here: <https://de.mathworks.com/help/symbolic/odetovectorfield.html> Best regards Stephan

Solve a system of odes where equations are derived from a separate code (not directly given) using syms function

Hi, have a read here: <https://de.mathworks.com/help/symbolic/odetovectorfield.html> Best regards Stephan

2 months ago | 0

| accepted

Answered

Cannot use fzero function

i recommend to use fminunc: x=fminunc(@funct,pi/2); function y = funct(x) y=7.*sin(2.*pi.*x).^2 end

Cannot use fzero function

i recommend to use fminunc: x=fminunc(@funct,pi/2); function y = funct(x) y=7.*sin(2.*pi.*x).^2 end

2 months ago | 1

Answered

Solving system of 3 nonlinear Equations

syms EPS0 E1 A1 E2 A2 RO e_y1 e_y2 e_z1 e_z2 I_y1z1 I_y2z2 M I_z1 I_z2 alfa fun1 = EPS0*(E1*A1 + E2*A2) - (1/RO)*(E1*A1*e_y1...

Solving system of 3 nonlinear Equations

syms EPS0 E1 A1 E2 A2 RO e_y1 e_y2 e_z1 e_z2 I_y1z1 I_y2z2 M I_z1 I_z2 alfa fun1 = EPS0*(E1*A1 + E2*A2) - (1/RO)*(E1*A1*e_y1...

2 months ago | 0

| accepted

Answered

Creating transfer function (using tf) with unknowns in it

You might want to work with tuneable models / tuneable parameters.

Creating transfer function (using tf) with unknowns in it

You might want to work with tuneable models / tuneable parameters.

2 months ago | 0

Answered

Find the intersection point between 2 curves

create a function handle depending from wave length, that subtracts both from each other. this is the objective function for usi...

Find the intersection point between 2 curves

create a function handle depending from wave length, that subtracts both from each other. this is the objective function for usi...

2 months ago | 1

Answered

fmincon with function file

change your function, that it accepts x and p as input. use: x = x(1); y = x(2); for passing p to the function read her...

fmincon with function file

change your function, that it accepts x and p as input. use: x = x(1); y = x(2); for passing p to the function read her...

2 months ago | 0

Answered

why my deeplearning toolbox can not work

you have to install the pretrained Networks seperatly. Use the Add on Manager.

why my deeplearning toolbox can not work

you have to install the pretrained Networks seperatly. Use the Add on Manager.

2 months ago | 0

| accepted

Answered

Sine function produces unexpected results

Hi, note: >> t = 0:0.1:1 t = Columns 1 through 8 0 0.1000 0.2000 0.3000 0.4000 0.5000 0....

Sine function produces unexpected results

Hi, note: >> t = 0:0.1:1 t = Columns 1 through 8 0 0.1000 0.2000 0.3000 0.4000 0.5000 0....

2 months ago | 1

| accepted

Answered

how to get float answer and not a Fraction ?

Hi, symbolic calculatuions are always precise. If you want a float point answer, you have to tell it to matlab: % one way: so...

how to get float answer and not a Fraction ?

Hi, symbolic calculatuions are always precise. If you want a float point answer, you have to tell it to matlab: % one way: so...

2 months ago | 0

Answered

Define functional bounds in FMINCON optimization

Define them as nonlinear constraint function: <https://de.mathworks.com/help/optim/ug/fmincon.html?s_tid=doc_ta#busog7r-nonlc...

Define functional bounds in FMINCON optimization

Define them as nonlinear constraint function: <https://de.mathworks.com/help/optim/ug/fmincon.html?s_tid=doc_ta#busog7r-nonlc...

2 months ago | 0

| accepted

Answered

How could normalize a matrix between 0 and 1.

result = normalize(x,2,'range')

How could normalize a matrix between 0 and 1.

result = normalize(x,2,'range')

2 months ago | 1

Answered

Simulation model of Kanban Production System with SimEvents

Did you see this example: <https://de.mathworks.com/help/simevents/examples/modeling-a-kanban-production-system.html>

Simulation model of Kanban Production System with SimEvents

Did you see this example: <https://de.mathworks.com/help/simevents/examples/modeling-a-kanban-production-system.html>

2 months ago | 2

Answered

How to loop the fsolve for various sets of parameters

Hi, store the parameters in an array and call fsolve in a loop. In every run of the loop you solve for one set of parameters....

How to loop the fsolve for various sets of parameters

Hi, store the parameters in an array and call fsolve in a loop. In every run of the loop you solve for one set of parameters....

2 months ago | 0

| accepted

Answered

How to draw Fig. 4

Hi, maybe this is useful: https://de.mathworks.com/help/matlab/math/solve-bvp-with-two-solutions.html As shown in the link,...

How to draw Fig. 4

Hi, maybe this is useful: https://de.mathworks.com/help/matlab/math/solve-bvp-with-two-solutions.html As shown in the link,...

2 months ago | 0

| accepted

Answered

for loop collecting output

Hi, it is not recommended to use i - since i is reserved for complex numbers. Perhaps use k or n or ii instead. I decided to us...

for loop collecting output

Hi, it is not recommended to use i - since i is reserved for complex numbers. Perhaps use k or n or ii instead. I decided to us...

2 months ago | 0

Answered

bitorreduce is undefined.

bitorreduce is a part of Fixed Point Designer - if you have a valid license for it, install Fixed Point Designer. Otherwise you ...

bitorreduce is undefined.

bitorreduce is a part of Fixed Point Designer - if you have a valid license for it, install Fixed Point Designer. Otherwise you ...

2 months ago | 0

| accepted

Answered

Help on solving equation?

Hi, try: A1=1.825*10^6; Zi=67; M=123; B=50.29; a=5; Z=134; AO0=2.6; P0=54.6; C=12; Ka=2.45; V=10^((-A1*(Zi^2)*sqrt(M...

Help on solving equation?

Hi, try: A1=1.825*10^6; Zi=67; M=123; B=50.29; a=5; Z=134; AO0=2.6; P0=54.6; C=12; Ka=2.45; V=10^((-A1*(Zi^2)*sqrt(M...

2 months ago | 0

| accepted

Answered

how to minimize set of values with genetic algorithm

Hi, you do not call ga here. Also your function would overwrite every input of x by the fixed values for x1...x5 inside your fu...

how to minimize set of values with genetic algorithm

Hi, you do not call ga here. Also your function would overwrite every input of x by the fixed values for x1...x5 inside your fu...

2 months ago | 1

| accepted

Answered

why doesnt matlab calculate this divisions

Hi, x,y are symbolic variables. Matlab shows them this way, due to accurracy. Insert a type cast to make them numbers: x...

why doesnt matlab calculate this divisions

Hi, x,y are symbolic variables. Matlab shows them this way, due to accurracy. Insert a type cast to make them numbers: x...

2 months ago | 0

Answered

i need to delete a zero from a single row 10 column vector

A = [0 1 2 3 0 5] A = A(A~=0)

i need to delete a zero from a single row 10 column vector

A = [0 1 2 3 0 5] A = A(A~=0)

2 months ago | 0

| accepted

Answered

how to convert Frames into video?

<https://de.mathworks.com/help/matlab/import_export/export-to-video.html>

how to convert Frames into video?

<https://de.mathworks.com/help/matlab/import_export/export-to-video.html>

2 months ago | 0

Answered

ODE45: ODE Error using odearguments must return a column vector

dtmdt = (1/C_rad*((Qinj_td)- (C*(Tm-Tair).^n)))'

ODE45: ODE Error using odearguments must return a column vector

dtmdt = (1/C_rad*((Qinj_td)- (C*(Tm-Tair).^n)))'

2 months ago | 0

Answered

ERROR: odearguments (line 90), ode45 (line 113)

add: yprime = zeros(4,1); before assigning values to yprime

ERROR: odearguments (line 90), ode45 (line 113)

add: yprime = zeros(4,1); before assigning values to yprime

2 months ago | 0

| accepted

Answered

how to select column from Table and create variable

Time = Trans{:,1:4}; Los = Trans{:,5};

how to select column from Table and create variable

Time = Trans{:,1:4}; Los = Trans{:,5};

2 months ago | 0

| accepted

Answered

solve single non linear

syms P B= 500*10^6; l = 1.55 *10^-6; R = 75; T = 300; eta = 0.9; Id = 5*10^-9; h = 6.625*10^-34; c=3*10^8; q= 1.6*10^...

solve single non linear

syms P B= 500*10^6; l = 1.55 *10^-6; R = 75; T = 300; eta = 0.9; Id = 5*10^-9; h = 6.625*10^-34; c=3*10^8; q= 1.6*10^...

2 months ago | 0

| accepted

Answered

how can i see the linear variation in the graph?

H = [ 1:2:11]; L = 0.0065; %K/m T0= 288.15; % till 11 km T = T0 - L.*H; %K plot(T,H,'-o')

how can i see the linear variation in the graph?

H = [ 1:2:11]; L = 0.0065; %K/m T0= 288.15; % till 11 km T = T0 - L.*H; %K plot(T,H,'-o')

2 months ago | 0

Answered

Applying Boundary Condition to ODE45

Hi, you can reverse tspan. If you for example use: tspan = [20 0] then the integration will be backwards and your con...

Applying Boundary Condition to ODE45

Hi, you can reverse tspan. If you for example use: tspan = [20 0] then the integration will be backwards and your con...

2 months ago | 0

| accepted

Answered

a and b constant

% Only needed if x,y are not column vectors x = reshape(x,[],1); y = reshape(y,[],1); % solve for a, b x = [x, ones(nume...

a and b constant

% Only needed if x,y are not column vectors x = reshape(x,[],1); y = reshape(y,[],1); % solve for a, b x = [x, ones(nume...

2 months ago | 1

Answered

Help me understand the Classifier App

Hi, see example 1 from this webinar: <https://de.mathworks.com/videos/machine-learning-with-matlab-100694.html> Also no...

Help me understand the Classifier App

Hi, see example 1 from this webinar: <https://de.mathworks.com/videos/machine-learning-with-matlab-100694.html> Also no...

2 months ago | 0

| accepted