Community Profile # jgg

2015 年からアクティブ

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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...

7年以上 前 | 0

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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...

7年以上 前 | 0

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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...

7年以上 前 | 0

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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...

7年以上 前 | 2 件の回答 | 0

### 2

Too 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...

7年以上 前 | 0

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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' ...

7年以上 前 | 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...

7年以上 前 | 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 ...

7年以上 前 | 0

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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...

7年以上 前 | 0

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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 ...

7年以上 前 | 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)(...

7年以上 前 | 0

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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(@...

7年以上 前 | 0

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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...

7年以上 前 | 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...

7年以上 前 | 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...

7年以上 前 | 0

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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;...

7年以上 前 | 1

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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...

7年以上 前 | 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...

8年弱 前 | 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...

8年弱 前 | 0

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...

8年弱 前 | 3 件の回答 | 0

### 3

I 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...

8年弱 前 | 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...

8年弱 前 | 0

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8年弱 前 | 1

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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. ...

8年弱 前 | 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...

8年弱 前 | 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...

8年弱 前 | 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...

8年弱 前 | 2

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Random multiply by negative one
Try this: A = [1,-1]; rand_nums = A(randi([1,2],22528,1000));

8年弱 前 | 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;...

8年弱 前 | 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...

8年弱 前 | 0