949 total contributions since 2017

Knowledge means knowing where it is written...

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Getting started with machine learning

Matlab has an excellent documentation site including several examples for every Toolbox. Additionally there are a lot of webinar...

Getting started with machine learning

Matlab has an excellent documentation site including several examples for every Toolbox. Additionally there are a lot of webinar...

ungefär 5 timmar ago | 0

Answered

Use "solution converged to an infeasible point" as an input

Use the output exitflag to find out if there was no feasible point: [x,fval,exitflag,output] = fmincon(@(X) obj_function(X,P,Pd...

Use "solution converged to an infeasible point" as an input

Use the output exitflag to find out if there was no feasible point: [x,fval,exitflag,output] = fmincon(@(X) obj_function(X,P,Pd...

ungefär 5 timmar ago | 1

| accepted

Answered

bvp4c gives error "The derivative function ODEFUN should return a column vector of length 4."

Your equations for dcccdt(2) and dcccdt(3) return vectors of size 4001x1, due to the length of p. This is the problem - there ha...

bvp4c gives error "The derivative function ODEFUN should return a column vector of length 4."

Your equations for dcccdt(2) and dcccdt(3) return vectors of size 4001x1, due to the length of p. This is the problem - there ha...

ungefär 5 timmar ago | 0

Answered

Jacobian Matix vector of variables?

You have to distinguish between a symbolic variable syms x and a symbolic function syms y(t) This is why this works: syms r...

Jacobian Matix vector of variables?

You have to distinguish between a symbolic variable syms x and a symbolic function syms y(t) This is why this works: syms r...

ungefär 11 timmar ago | 0

Answered

Equation with one unknown

With Symbolic Toolbox: syms t positive g=9.807; %m/s2 d= 1.225; %kg/m3 A=1.9; m=84; Cd=1.14; fun = 2*m/(A*Cd*d)* l...

Equation with one unknown

With Symbolic Toolbox: syms t positive g=9.807; %m/s2 d= 1.225; %kg/m3 A=1.9; m=84; Cd=1.14; fun = 2*m/(A*Cd*d)* l...

ungefär 12 timmar ago | 0

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Answered

How can i graph the function from 0 to a certain interval?

doc xlim doc ylim

How can i graph the function from 0 to a certain interval?

doc xlim doc ylim

ungefär 19 timmar ago | 0

Answered

ODE non homogeneous ploting graph

y = @(x) -5.*exp(2.*x) + 3.*exp(x) + 3.*cos(x) + sin(x); fplot(y,[-20 1],'b-',"LineWidth",2)

ODE non homogeneous ploting graph

y = @(x) -5.*exp(2.*x) + 3.*exp(x) + 3.*cos(x) + sin(x); fplot(y,[-20 1],'b-',"LineWidth",2)

en dag ago | 0

Answered

ODE45 - Modeling GHR Microspic Car following Model

This code runs, but still has a problem: load mytrafficdata5; basic_ghr(Distance_n,Time_t,Velocity_n) function basic_ghr(Di...

ODE45 - Modeling GHR Microspic Car following Model

This code runs, but still has a problem: load mytrafficdata5; basic_ghr(Distance_n,Time_t,Velocity_n) function basic_ghr(Di...

3 dagar ago | 0

Answered

Accessing the Confusion Matrix Data

doc confusionmat confusionmat gives you a matrix, containing all the informations needed - it can be used also as the Normalize...

Accessing the Confusion Matrix Data

doc confusionmat confusionmat gives you a matrix, containing all the informations needed - it can be used also as the Normalize...

3 dagar ago | 0

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Answered

Continuous and repetitive gaussian random function in matlab

If i understood you correctly, you want to get the same random values every time you run your code. This is reached by the rng f...

Continuous and repetitive gaussian random function in matlab

If i understood you correctly, you want to get the same random values every time you run your code. This is reached by the rng f...

4 dagar ago | 0

Answered

random (normal, gaussian series data

If you have Statistics and Machine Learning Toolbox: https://de.mathworks.com/help/stats/makedist.html?s_tid=doc_ta#btstdan-2 ...

random (normal, gaussian series data

If you have Statistics and Machine Learning Toolbox: https://de.mathworks.com/help/stats/makedist.html?s_tid=doc_ta#btstdan-2 ...

4 dagar ago | 0

Answered

Help with file format conversion please!

% Setup the Import Options and import the data opts = delimitedTextImportOptions("NumVariables", 2); % Specify range and del...

Help with file format conversion please!

% Setup the Import Options and import the data opts = delimitedTextImportOptions("NumVariables", 2); % Specify range and del...

4 dagar ago | 0

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Answered

how do I substitute all negative values in a vector with a random number between 0 and 2

y(y<0) = 2*rand(1,numel(y(y<0)))

how do I substitute all negative values in a vector with a random number between 0 and 2

y(y<0) = 2*rand(1,numel(y(y<0)))

4 dagar ago | 0

Answered

Setting an equation equal to another variable (rearranging) in 2012b

syms s t eq = s == 3*5^(1/2)*t sol_t = solve(eq,t) Beginning from 2017a you can use *isolate*.

Setting an equation equal to another variable (rearranging) in 2012b

syms s t eq = s == 3*5^(1/2)*t sol_t = solve(eq,t) Beginning from 2017a you can use *isolate*.

5 dagar ago | 1

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Answered

Hello. Is SimPowerSystem available in Matlab 2019a?

The toolbox was changed and the functions are now available in Simscape Electrical.

Hello. Is SimPowerSystem available in Matlab 2019a?

The toolbox was changed and the functions are now available in Simscape Electrical.

10 dagar ago | 0

Answered

Hi! How I can download matlab R2010a?

<https://www.mathworks.com/downloads/web_downloads/select_release?mode=gwylf>

Hi! How I can download matlab R2010a?

<https://www.mathworks.com/downloads/web_downloads/select_release?mode=gwylf>

11 dagar ago | 0

Answered

Saving a graph with edges and nodes

You can not save a workspace object in a *.m-file*. Use a *.mat-file* instead to save your graph. You can load this in other scr...

Saving a graph with edges and nodes

You can not save a workspace object in a *.m-file*. Use a *.mat-file* instead to save your graph. You can load this in other scr...

14 dagar ago | 0

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Answered

Where can I study more about scripts in Mat Lab.

you might want to look here: <https://de.mathworks.com/learn/tutorials/matlab-onramp.html?s_cid=learn_ONRAMP_BAN>

Where can I study more about scripts in Mat Lab.

you might want to look here: <https://de.mathworks.com/learn/tutorials/matlab-onramp.html?s_cid=learn_ONRAMP_BAN>

18 dagar ago | 0

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Answered

Fit y=m*x into a non lineardata

This forces b to be equal to zero - the value you are interested in is m(1): % Your data x = 0:10; y = [1.5 3 5 7 8 9 13 16 2...

Fit y=m*x into a non lineardata

This forces b to be equal to zero - the value you are interested in is m(1): % Your data x = 0:10; y = [1.5 3 5 7 8 9 13 16 2...

30 dagar ago | 1

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Answered

automate the transfer of text files iteraton wise

name = "file_1.txt"; filelist = string(zeros(730,1)); diffusion = cell(730,1); for k = 1:730 number = string(k); f...

automate the transfer of text files iteraton wise

name = "file_1.txt"; filelist = string(zeros(730,1)); diffusion = cell(730,1); for k = 1:730 number = string(k); f...

30 dagar ago | 1

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Answered

filter string in the string

str = 'this matlab is a good software, it is a version 9.4 which is equal to 2018a' str = char(str); idx = find((uint8(str)>=...

filter string in the string

str = 'this matlab is a good software, it is a version 9.4 which is equal to 2018a' str = char(str); idx = find((uint8(str)>=...

ungefär en månad ago | 1

| accepted

Answered

Reading Data from txt file with a unique FormatSpec

One way: A = reshape(double(replace(string(readcell('Test.txt')),["[[", "[", "]", "]]"],["", "", "", ""])),[],12) This uses th...

Reading Data from txt file with a unique FormatSpec

One way: A = reshape(double(replace(string(readcell('Test.txt')),["[[", "[", "]", "]]"],["", "", "", ""])),[],12) This uses th...

ungefär en månad ago | 0

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Answered

Solving a ODE in matlab

ode = @(t,y) y.^2-y.*0.1*cos(2.*t)-0.2*cos(2.*t); t=[0 8]; y0 = -1; [t,y] = ode45(ode,t,y0); plot(t,y)

Solving a ODE in matlab

ode = @(t,y) y.^2-y.*0.1*cos(2.*t)-0.2*cos(2.*t); t=[0 8]; y0 = -1; [t,y] = ode45(ode,t,y0); plot(t,y)

ungefär en månad ago | 2

| accepted

Answered

n x 1 array, add row-wise

https://de.mathworks.com/help/matlab/ref/cumsum.html A = [1 3 4 5 3 8 3]' B = cumsum(A)

n x 1 array, add row-wise

https://de.mathworks.com/help/matlab/ref/cumsum.html A = [1 3 4 5 3 8 3]' B = cumsum(A)

ungefär en månad ago | 0

| accepted

Answered

help to convert text file symbol into array

Assuming you import this as a string, you could use: a = "4c07b] IF hit state: 5 (S) valid:" b = char(a) c = b(:) which give...

help to convert text file symbol into array

Assuming you import this as a string, you could use: a = "4c07b] IF hit state: 5 (S) valid:" b = char(a) c = b(:) which give...

ungefär en månad ago | 0

| accepted

Answered

Run a code for several values

Sounds like you might be interested in vectorization.

Run a code for several values

Sounds like you might be interested in vectorization.

ungefär en månad ago | 0

Answered

write a function that takes any equation as an input

You might to want to achieve this: % Inputs xvals = 0:0.01:10; fun = @(x) x.^5 + sin(x); % call function res = splinecalc...

write a function that takes any equation as an input

You might to want to achieve this: % Inputs xvals = 0:0.01:10; fun = @(x) x.^5 + sin(x); % call function res = splinecalc...

ungefär en månad ago | 1

Answered

How to extract specific images from a library of images?

You can construct a string array of the desired file names like follows: exceldata = [0,3,8,12,16,224]; filenames = string(100...

How to extract specific images from a library of images?

You can construct a string array of the desired file names like follows: exceldata = [0,3,8,12,16,224]; filenames = string(100...

ungefär en månad ago | 0

| accepted