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How to create variables in the command prompt space using a function
First of all, comments in MATLAB are given by %, not //. Second, which function are you calling first, and from where, and wh...

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How to export data from a GUI to Matlab Workspace?
In the code of the GUI, when you want to export the variables do: save guioutput This will save all of the variables in ...

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Best way to determine if number is triangular number?
istri = @(x) floor(sqrt(8*x+1))==sqrt(8*x+1); x = 1:20; idx = istri(x) x(idx)

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access outputs of functions with multiple outputs
There *is* a way to do it, but I am reluctant to share it because I don't think it is worthwhile to program this way. I cannot ...

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reading a song in matlab
Make sure that the file is in the current directory first, then: [Y,FS] = wavread('myfile.wma');

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for loop to make a taylor series
If you write it as: e^x = x^0/0! + x^1/1! + x^2/2! + .... + x^n/n! then you can see the pattern easier. I don't want to...

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2D Array Manipulation / Script
You can also use <http://www.mathworks.com/matlabcentral/fileexchange/24536-expand expand>, which is written to be more general ...

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Duplicate the value of a cell for other cells in a matrix
Here is an example; adapt it as needed. A = magic(10); % The array. N = randperm(numel(A)); % Random linear indices....

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Symbolic solve giving wierd roots
docsearch('rootof') Look at the documentation of SOLVE, scroll down to rootof.

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How can I plot a symbolic function or determine a finite and real starting guess for fzero?
If you have a function of one variable, you can use my <http://www.mathworks.com/matlabcentral/fileexchange/6924-newtzero newtze...

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Loops and Complicated Matrix Multiplication
Often times it is easier to figure out such a problem by looking at a simpler version where we can actually keep track manually....

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stem and set function: A question
set(z,'linewidth',6,'color','r')

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Find Function in MATLAB to Compare two vectors
Given your example inputs and outputs: % The inputs A = [1, 2, 3, 4, 5].' B = [2, 4, 5, 6, 7;10, 11, 13, 14, 15].' ...

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Matlab - convert vector to discrete function
You can fit a polynomial to U, or a spline or any function. We must know what the expected relation is, or at least see the gra...

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Heuristic solver for lambert W function?
X = solve('x*(2^x)=b/ln(2)','x'); x_b3 = subs(X,'b',3) % x when b=3

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Help with 'solve' function in MATLAB for numerical solution!
d = solve('x=(2^x)*b+c'); n = subs(d,{'b','c'},{2,3}) % Put 2 for b, 3 for c If you are doing the substitutions in a lo...

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Plotting a vertical line using ezplot
This will put a vertical line in the middle of the axes. Adjust as needed. LIM = get(gca,{'xlim','ylim'}); L = line(mea...

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Hello everyone, I would like to write a function to find the prime number from 0 to n . I would apreciate your help!
p = @(n) primes(n);

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Can't define functions in Matlab
At the command prompt, type: edit Now paste your code into the window that opens up. Then save it. From the commamd prompt ...

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Avoid for loops with if inside
idx = bsxfun(@minus,A(1,:).',B(1,:))<5; C(idx) = C(idx) + 1; It would help if you specified the sizes of A, B and C. I ...

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question about matlab code and function......
You might want to read the Getting Started section of the documentation. Also, why would you want the function to only work on ...

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name several curves within a loop
You could put a text on each curve. But placing the text could be tricky with that many curves on one plot. x = 0:.01:1;...

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construct a function which randomly change one bit a column
A = round(rand(4,4)); % The initial matrix. % Given A, use this to change one random element per column. [m,n] = size(A...

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How do you combine multiple commands into a single code for one execution?
Follow these steps. 1) At the command line, type: edit 2) Paste your code into the blank document you opened in ste...

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How to run m-files automatically ?
D = dir('*.jpg'); for ii = 1:length(D) % Put your processing code here. Call image names as below... fprint...

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Generate permutations of numbers
You can use my <http://www.mathworks.com/matlabcentral/fileexchange/11462-npermutek npermutek>. npermutek([0 1],2) a...

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A question on input and output arguments in a function, interesting.
Even a one-line function is possible in MATLAB. This is a valid function... function num = myecho(num)

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Purpose of guidata(hObject,handles)
This stores the variable named 'handles' in the guidata of the object with handle HObject. I assume you saw this in the Ope...

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Creating a white background behind a subplot that is placed over another sublot
I would simply use a UIPANEL. Here is some code that will run, based on your code. Note the last three lines: h=figur...

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ho to plot multy-axis with Two Y-axis in left hand side?
You can just alter the PLOTYY function: figure x = 0:0.01:20; y1 = 200*exp(-0.05*x).*sin(x); y2 = 0.8*exp(-0.5*x...

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