838 total contributions since 2017

Knowledge means knowing where it is written...

Interested in:

- Optimization

- Mathematical Modelling

- Improvement of my programming skills

Answered

error variable y in fitness function

function y=fungsi3(x) y=2+exp(-(x(1).^2+x(2).^2)).*(sin(4*x(1))+cos(8*x(2))); end

error variable y in fitness function

function y=fungsi3(x) y=2+exp(-(x(1).^2+x(2).^2)).*(sin(4*x(1))+cos(8*x(2))); end

4 days ago | 0

Answered

How can I expand x axis to have normal plot?

A(:,1)=data{:,1}; A(:,2)=data{:,2}; A=sortrows(A,1); plot(A(:,1),A(:,2))

How can I expand x axis to have normal plot?

A(:,1)=data{:,1}; A(:,2)=data{:,2}; A=sortrows(A,1); plot(A(:,1),A(:,2))

6 days ago | 0

| accepted

Answered

Check to find if a row has an element occuring more than once

A = [0 0 1 1 0 0; 0 0 0 0 0 1; 1 1 0 0 0 1] res = (sum(A==1,2)>1) This works row-wise for more than 1 rows

Check to find if a row has an element occuring more than once

A = [0 0 1 1 0 0; 0 0 0 0 0 1; 1 1 0 0 0 1] res = (sum(A==1,2)>1) This works row-wise for more than 1 rows

8 days ago | 0

| accepted

Answered

how can I create a multiplication table and write it to spreadsheet in Matlab?

a = 1:5; t = a .* a' writematrix(t,'multiplication.xlsx')

how can I create a multiplication table and write it to spreadsheet in Matlab?

a = 1:5; t = a .* a' writematrix(t,'multiplication.xlsx')

8 days ago | 0

Answered

How do you give data as argument of fmincon?

<https://de.mathworks.com/help/optim/ug/passing-extra-parameters.html>

How do you give data as argument of fmincon?

<https://de.mathworks.com/help/optim/ug/passing-extra-parameters.html>

9 days ago | 1

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>

9 days 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

10 days 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

11 days 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...

12 days 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.

12 days 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...

14 days 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...

14 days 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.

14 days 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....

15 days 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...

15 days 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...

18 days 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')

18 days 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>

19 days 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....

19 days 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,...

20 days 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...

20 days 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 ...

21 days 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...

21 days ago | 0

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...

21 days 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...

22 days 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)

22 days 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>

25 days 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)))'

25 days 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

26 days ago | 0

| accepted