# jgg

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**Content Feed**

How to convert a string to a variable useable in a script?

I think you're like 99% of the way there. Z11='haar_net_scg_in1_2obsrv'; yfit11 = eval(strcat(Z11,'(Ind_vald)'); Thi...

meer dan 6 jaar ago | 0

| accepted

How to optimize this program using a for loop?

As far as I can tell, you're just doing this: fm1 = ifft(fft(fx)/norm(fx).*y); figure(1) plot(abs(fm1)) fm2 = if...

meer dan 6 jaar ago | 0

| accepted

How to set linspace to infinity

No, this isn't possible because <http://www.mathworks.com/help/matlab/ref/linspace.html linspace> generates a uniformly spaced v...

bijna 7 jaar ago | 0

| accepted

Question

Creating a block matrix of matrices?

I have a problem where I'm trying to create a matrix of the form [A B 0 0; 0 A B 0; 0 0 A B; 0 0 0 A]; However, this is i...

bijna 7 jaar ago | 2 answers | 0

### 2

answersToo many input arguments error. Matrix variable as input to objective function. Using ga algorithm.

As you've written it, your objective function does not take in any inputs. It needs to take in the point to be evaluated and ret...

bijna 7 jaar ago | 0

| accepted

How do you store all return values from a while loop in a vector in matlab ?

You can just store it as a vector: vector_choice_breakfast = cell(1000,1); count = 1; while breakfast_choicerep == 'Y' ...

bijna 7 jaar ago | 0

problem with matlab when trying to use a condition

You've opened a scoped environment. In order to end the scope, you need to use |end|: if i == 1 % do stuff end If y...

bijna 7 jaar ago | 0

Why is My Code Running So Slowly?

Try using the profiler, as per isakson recommends. This will give you an idea of what is taking up your time. MATLAB will use ...

bijna 7 jaar ago | 0

| accepted

OLS regression for bootstrapped data

To answer your question based on my comment. The command |Y = A(:,i)| selects the |i|-th column from the |A| matrix, so this wi...

bijna 7 jaar ago | 0

| accepted

How do I compare between 10 groups on a Ttest2?

Let's suppose you have them labeled |v1|, |v2|, ..., |v10| and they're the same size |n|. (If they're not the same size, use a ...

bijna 7 jaar ago | 0

How to integrate SS y*exp(x) dxdy using matlab?

I think this should work; you want the |integral2| function. fun = @(x,y)(x.*exp(y)); ymin = @(x)(x/4); ymax = @(x)(...

bijna 7 jaar ago | 0

| accepted

How to output multiple results via function

Do you mean from the function |fun|? It's pretty easy: function [f,yl,otherstuff] =fun(y,lambda) [y,fval]=fmincon(@...

bijna 7 jaar ago | 0

| accepted

Define a text string and use in variable name throughout script

You can do this using the eval command, but you should AVOID it if possible. If there's any way to change the way those matrice...

bijna 7 jaar ago | 0

Using table in MATLAB 2012

Matlab 2012 doesn't support the |table| function; it was implemented in R2013b. If you want to use that function, you will ne...

bijna 7 jaar ago | 0

questions related with tic and toc ?

1) They're the sounds a mechanical clock makes. Tick, tock, tick, tock as the pendulum swings back and forth. 2) The value o...

bijna 7 jaar ago | 0

| accepted

Parpool time to launch excessive

I'm going to answer this question for myself, approximately. It seems the issue was not specific to the MATLAB2014b compiler;...

bijna 7 jaar ago | 1

| accepted

How do i improve this loop?

Your approach should work. Try this instead: Image3 = randn(10,10,3)+355; %example data mask = Image3(:,:,1) > 350 & Imag...

ongeveer 7 jaar ago | 0

function handle producing different output

Not sure what the deal is, but this works: A_vals = A(0.1:0.01:1); vals = 0.1:0.01:1; B_vals = B(0.1:0.01:1); plot(val...

ongeveer 7 jaar ago | 0

How to Solve a System of Equations with Multiple Variables

You can do this using numerical optimization by setting up an equation in which the objective function is the norm of the equati...

ongeveer 7 jaar ago | 0

Question

Parpool time to launch excessive

Hello everyone I'm working with a large server which is running a large computation. I've been trying to speed this up using...

ongeveer 7 jaar ago | 3 answers | 0

### 3

answersI need to make a set of 2000 random numbers between 0 and 1, with a mean of 0.5, with most of the numbers being either high or low (bimodal distrubution with peaks at 0 and 1)

m = randi([0,1],2000,1); r = abs(randn(2000,1)); r = r - min(r); r = r./max(r); num = m; num(m==0) = 0 + r(m==0); n...

ongeveer 7 jaar ago | 0

How GlobalSearch optimization method works?

Basically, GlobalSearch takes a problem you've defined, which consists of an objective function and a solver, then repeatedly ru...

ongeveer 7 jaar ago | 0

| accepted

Student or Education License, which?

It really depends on what you're trying to do. The Student license, if you have access to the license through your university, ...

ongeveer 7 jaar ago | 1

| accepted

What does command 'rng default;' do?

When Matlab generates random numbers, they're not truly random; they are based on a pseudo-random number generating algorithm. ...

ongeveer 7 jaar ago | 13

Undefined function or variable 'S', help!

You never define |S| in your function. You probably want something like this: function euler(func,S0,dt,t0,tf) % Time inte...

ongeveer 7 jaar ago | 0

How to remove some certain rows in Matlab?

Ah, I think I understand: the first column are IDs or something. This should work, using the |ismember| function with the |rows...

ongeveer 7 jaar ago | 0

How to (1) accept user input while (2) keeping track of the number of character keys being pressed?

I think you can do it by making a customized version of |GetEchoString|. I don't have the toolbox, but the code looks simple <h...

ongeveer 7 jaar ago | 2

| accepted

Random multiply by negative one

Try this: A = [1,-1]; rand_nums = A(randi([1,2],22528,1000));

ongeveer 7 jaar ago | 0

Fitting using fit - i can't fit function without one constant [SOLVED]

Try this: %xdata = ...; %load your data %ydata = ... Le = 0.00025; Rm = 2.649; Mm = 0.00002; Cm = 0.00016; Bl = 10.5;...

ongeveer 7 jaar ago | 0

how do i copy figure in linux

Try this: bar(1:10) %whatever your figure is print('BarPlot','-dpng') There are other options here: http://www.mat...

ongeveer 7 jaar ago | 0