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Is there a better way to randomly generate a Doubly Stochastic Matrix?
This looks promising. I have kept some notes in the comments so you can see what I was doing... There are three lines of cod...

13 years 前 | 1

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I need to know how matlab do A(B) where A and B are 2 vectors
I believe that these basic things are done just like you show, but in *compiled C-code.* Thus it is much faster that using inte...

13 years 前 | 0

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how to use a simple statement to describe a repeat format output about the function "fprintf"?
fprintf(fid,repmat('%4.2f',1,5),data)

13 years 前 | 0

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Best way to share code within laboratory
We all use a shared network drive that is added to the path on everyone's MATLAB. Every function in the shared drive has a comm...

13 years 前 | 0

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Two y axes in subplot
You can use SUBPLOT to set the location for your PLOTYY call. % Data to plot. x = 0:0.01:20; y1 = 200*exp(-0.05*x)....

13 years 前 | 1

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How to plot the columns (second till 15) data against the firs column (simulation time) instead of plotting against the serial number in once by pressing the plot button?
Let's say your data looks like this: D = (0:.01:1).'; % Used to make the data array... D = [D bsxfun(@power,D,1:10)]; ...

13 years 前 | 0

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How to split a nxn matrix into n vectors
Jan is correct. Doing this is a bad idea. If you need to use the POLYDER function on each row of a large array, there are seve...

13 years 前 | 0

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how to find out the correct coefficients from a roots -vector
anonym, you need to think about what you are doing. When you have: a = [2 4 6 8]; this represents this polynomial: 2...

13 years 前 | 0

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Floating point accurarcy and COLON
This explains how the colon operator works. It is an interesting read. <http://www.mathworks.com/support/solutions/en/data...

13 years 前 | 5

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input for function drawgraph(coords)
Are you talking about the function on this page? <http://www.mathworks.com/help/dotnetbuilder/ug/c-integration-examples.html#...

13 years 前 | 0

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How to break a while loop in a gui toggle button callback?
Here is an example. Basically you have to flush the event queue by calling DRAWNOW or PAUSE to check if the state of the button...

13 years 前 | 1

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reshape function row wise
Since you don't give a small example of input and expected output (always a bad practice when asking for help!!), I will guess t...

13 years 前 | 1

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"Subscripted assignment dimension mismatch"
This error occurs, much like the message tells you, when you try to put the wrong number (or shape) of items into an array. Her...

13 years 前 | 0

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HISTEQ default not consistent with syntax?
IM = imread('cameraman.tif'); I = histeq(IM); I2 = histeq(IM,ones(1,64)*(numel(IM)/64)); isequal(I,I2) ans = ...

13 years 前 | 0

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change output filename in a loop
<http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F>

13 years 前 | 0

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Need an IF boolean that compares a number to all numbers in an array
a = [1,2,3]; b = 2; if any(b==a) disp('b in a') else disp('b not in a') end Also, see the help for ...

13 years 前 | 0

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search for string array index
That example fails... But let's try this one: x=['a b c0 d';'a b e1 f';'a x d2 f';'m b e1 f';'a b e1 f']; find(x(:,...

13 years 前 | 0

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Prevent rounding of a number.
Why do you think MATLAB is rounding 0.99998474121093744448884876 to 1? F = 0.99998474121093744448884876; F==1 % No ...

13 years 前 | 0

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Read text file containing string and numeric data
fid = fopen('Test.txt'); C = textscan(fid,repmat('%s',1,19),'Headerlines',1) fclose(fid) HeadDiam = str2double(C{8});...

13 years 前 | 0

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Given matrices XX and YY of sizes 3X3, how can I generate the following matrix: [XX(1,1) YY(1,1); XX(1,2) YY(1,2)... ?
For example: XX = magic(3); YY = cumsum(ones(3)); % Your requested matrix. ZZ = [reshape(XX.',[],1) reshape(YY.',[...

13 years 前 | 0

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axes problem in a plot
You can set the axes limits to be a certain percent of the data or fixed values, depending on what you want. x = -pi:.00...

13 years 前 | 0

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how to creat Multiplication table
I am not quite sure if this is what you want, but have a look at this: A = 1:5;, B = 1:10; C = bsxfun(@times,A,B.'...

13 years 前 | 0

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hii.. Is it possible to get the coordinates of all the points in a line drawn through plot function in an image?
Aren't there an infinite number of coordinates? Just look at the equation for a line: y = m*x + b; So if you have a s...

13 years 前 | 0

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Save data before error
I recommend you either wrap all of your code in a TRY-CATCH or use DBSTOP so that you don't lose your data again. Note that if ...

13 years 前 | 0

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Finding the numbers of a vector with the same length?
Here's another solution: D = diff(find([1 ~x 1]))-1; D = histc(D,1:max(D))

13 years 前 | 2

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Plotting Points from Cells
Say your cell array is called C, like this: C = cellfun(@(x) rand(1,3),cell(1000,1),'Un',0); Now we can plot the points ...

13 years 前 | 2

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Reboot a gui in Matlab
Here is a simple example: function [] = restart_gui() S.f = figure('menubar','none',... 'numbe...

13 years 前 | 0

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How can I generate a matrix with the same vector in all the lines?
I think this is what REPMAT probably is doing behind the scenes: V = 1:3; M = V(ones(1,4),:)

13 years 前 | 0

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Composing arrayfun syntax to extract data from structure
O.k., if you are just messing around with ARRAYFUN. C(1,1).idx = [1;1;2;3]; C(2,1).idx = [1;1;2]; C(1,1).s = {'a';'...

13 years 前 | 0

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3D Matrix to replace a square matrix in a for loop?
(To find your MATLAB version, type: ver) Have you looked at BSXFUN? For better suggestions, give some data and a loop that ...

13 years 前 | 0