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how can I create a matrix from calculated answers
M = zeros(n); for k = 1:n % calculate y M(k,k) = y; end Or, preferably, if you can calculate all the y values in ...

約15年前 | 0

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Help regarding "format long"
Welcome to the joy of round-off error. 0.0002 is not exactly representable in binary, hence adding these floating point numbers...

約15年前 | 1

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How can I group data and plot them with unique markers for each group?
Given your description of the data and what you're trying to do with it, I'd say you really need Statistics Toolbox. Then use d...

約15年前 | 0

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How would I solve y'' = sinh(y) using finite differences?
Great, if it doesn't have to be a specific FD formulation, you can use <http://www.mathworks.com/help/matlab/ref/bvp4c.html |bvp...

約15年前 | 1

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Drawing and animation in Matlab
Doh. Too late. Still, how's this: paths = [3,3,2,1,1;1,2,1,3,2;3,3,3,2,3]; [m,n] = size(paths); th = linspace(0,...

約15年前 | 0

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find row of point in plot
Here's an interactive approach: % Make some data data = rand(10,3); otherdata = randi(5,10,3) % Plot plot3(data...

約15年前 | 0

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Matlab max array size
Technically, 25920-by-1296 is 256.3Mb, but let's not quibble over a few meg :) If you're on a Windows machine, type |memory| ...

約15年前 | 0

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Log scale graphic with negative value
Oookay, I think I have it. If you're going to do this a lot, you may want to make yourself your own function. So, see if this ...

約15年前 | 0

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Problem save
If you want ascii, why not just write out using |fprintf|? fid = fopen('a.txt','wt'); fprintf(fid,'%hd\n',a); fclose(...

約15年前 | 0

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Handling excel file
Why not import everything, then strip out any blank rows? [~,~,x] = xlsread('foo.xls'); x(all(cellfun(@isempty,x),2),:) ...

約15年前 | 0

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Estimate an expression for a Probability Density Function
By the "cumulant" function, do you mean the cumulative probability density? Because, in that case, the PDF is just the derivati...

約15年前 | 0

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fprintf in a for loop printing repetitive answers in command window
Your code is hard to read b/c of the formatting, but it seems to me that you're trying to do something very similar to <http://w...

約15年前 | 0

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How to convert my gui program to an exe file?
# Make sure you have MATLAB Compiler and a supported C compiler # Run the command |mbuild -setup| to select your C compiler # ...

約15年前 | 5

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How do I generate a given Matrix in one command?
A = full(gallery('tridiag',ones(1,4),ones(1,5),ones(1,4))) But my current favorite: A = 1-reshape(mod(floor((1:25)/3),...

約15年前 | 3

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GUI Output
As Matt Fig says, it would help to know what you're doing to get a vertical stack. Are you using |char| of a cell array of stri...

約15年前 | 0

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Multiple use of polyfit - could I get it faster?
In the manner of Jan's answer, just stripping down to a brute-force least-squares fit can give a lot of speed-up. I'm assuming ...

約15年前 | 2

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Basic Function Error (Plot Related
The operator you're looking for is |.^| (ie |x.^2|) And similarly |.*| and |./|

約15年前 | 0

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please help me in loading data to matlab
Would you be surprised if I suggested that what you really need is Statistics Toolbox? But, the brute-force way in MATLAB cou...

約15年前 | 1

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Debug this: for loop
Quick diagnostic: display the value of |P| (after it's returned by |bwlabel|)

約15年前 | 1

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please help me in loading data to matlab
BTW, best practice is to accept the answer that solved your initial question, then start a new question for the follow-up. That...

約15年前 | 1

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How do I create a varying number of outputs from a function file?
Sounds like you're looking for |varargout|. It's a cell array, with each cell holding one of the outputs. To see how many outp...

約15年前 | 0

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Log scale graphic with negative value
Richard pretty much beat me to it. Here's a slightly more automated way to get the tick marks. However, unfortunately there's ...

約15年前 | 2

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Log scale graphic with negative value
Dumb question, but is there any reason you can't just look at the absolute values? ( |abs| in MATLAB)

約15年前 | 0

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Dumb mistakes we make with MATLAB.
More in keeping with the OP, and another in the "physician heal thyself" category: [fiddling about at the command line, tryin...

約15年前 | 3

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Import Excel and plot
Run the line |[numbers,colNames] = xlsread(fileName);| from the Command Window (with the appropriate |fileName| filled in, obvio...

約15年前 | 0

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please help me in loading data to matlab
Similar to what Andrew said, but I'd go with fid = fopen('Adult.data'); A = textscan(fid,'%f%s%f%s%f%s%s%s%s%s%f%f%f%s%s,'d...

約15年前 | 2

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Saving memory by reusing a variable name?
I'd guess they'd be the same. Matrix multiply requires having to make an intermediate variable anyway (behind the scenes, if no...

約15年前 | 2

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GUI handles problem
It sounds like you're trying to refer to a local variable in a separate function. The GUI function created by GUIDE contains th...

約15年前 | 0

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Dumb mistakes we make with MATLAB.
I've been using MATLAB for 15 years or so - I teach people how to use it - and, of course, I stress the important difference bet...

約15年前 | 4

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vector to repeated matrix multiplication
Not being able to think up a more elegant solution off the top of my head, how about reshape(repmat(A(:),1,3)*(V'),2,2) Or, ...

約15年前 | 1