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Angles from XY coordinates from a matrix
Seems like a simple FOR loop would do the trick. for ii = size(a,1):-1:1 P12 = [a(ii,3)-a(ii,1), a(ii,4)-a(ii,2)];...

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Logical -1 = Logical 1?
Yes: logical([-1 0 1 20 -10 .001 eps ]) The exception is NaN. NaN is non-zero, yet cannot be converted to logical. ...

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A function to draw a circle with only radius as parameter?
function [] = plot_circle(R) % Plots a circle of radius R [X,Y] = cylinder(R,1000); plot(X(1,:),Y(1,:)) axis equal...

casi 14 años hace | 1

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swap letters 2 by 2 in a string.
S = 'abcdefg' S = S([2 1 4 3 6 5 7]) Or, generally: for ii=1:2:numel(S)-mod(numel(S),2),S([ii,ii+1])=S([ii+1,ii]),e...

casi 14 años hace | 1

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imshow command not found
Apparently you do not have the IPT installed. Did you purchase this toolbox with MATLAB? You might have to talk to the system ...

casi 14 años hace | 1

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'eval' works on one computer but not on the other....
On the computer where it does not work, do this: which cd See if someone has saved a script named cd that is masking the...

casi 14 años hace | 0

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How do I deal with large modulus in mod function that produces a wrong result?
I would say you have to go symbolic. mod(sym(A),sym(B))

casi 14 años hace | 0

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Left - Rigth - double click on a plo
Look at this example for how to use this property. function [] = figselect() % Click in the axes figure('windowbu...

casi 14 años hace | 0

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Cell array....searching without a loop?
Post a simple, small example of the FOR loop you have been using to solve the problem. Say A = {rand(5,3,2);rand(5,3,2);r...

casi 14 años hace | 0

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Radio button panel prblm
In your Least_Sqaure_Optimization_OpeningFcn put this: set(handles.uipanel1,'SelectedObject',[]) Where uipanel1 is the...

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How can i skip iterations in for loop
Why not just give up on the FOR loop and use a WHILE loop? That way you control when to increment the index the whole time! As...

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what is global nummod
Why don't you ask the author. Hist email contact is listed on this page: <http://www.clear.rice.edu/elec301/Projects01/>

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Cool examples of how Matlab is useful
I would humbly submit this code I wrote for my M.S. in Mechanical Engineering. It calculates the resonant frequencies and plot...

casi 14 años hace | 3

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get a matrix of only zero
A = zeros(2,5)

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uicontrol assigning values a a user defined date
Here is one way to make the code return a value. function [userdate]= datepicker (~) figure('units','pix',... ...

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Trying to create an array of Matrices
Use t{i} instead of t(i)

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Why quad function can't communicate with my subfunction?
If that is the error message, communication is not the problem. Re-read the message.... there is a problem with what your funct...

casi 14 años hace | 0

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Why does this error occur when using simplify?
Because you are misusing the function. I think you want this: syms x eq = 3.1*cos(sin(x))*tanh(x) simplify(eq) % T...

casi 14 años hace | 0

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problem with combvec, allcomb
This will solve your problem. function M = expand_vects(A) % A is a cell array of 1-by-n vectors where n need not ...

casi 14 años hace | 0

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find simlar number in array
Similar or identical? Those are different! .5 is similar to .6, but not identical. If you mean identical, you can count how...

casi 14 años hace | 0

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Create changing variable names inside a loop
Don't program this way in MATLAB! Please take the time to learn proper programming techniques for the language you are using. ...

casi 14 años hace | 0

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Reading from GUI edit boxes using a self made function
Where is that function located? Is it in the GUI m-file or a separate m-file? From where are you calling it? Are you calling ...

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how to solve unknown coefficents in matrixs
Use the NULL command. A =[1 2 3;3 4 5]; X = null(A); A*X %Check

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Averaging a Random Walk with Numbers Spanning [-1,1]
Wouldn't this be easier? T = 2*rand(1,10)-1; Num_change = sum(logical(diff(sign(T))))

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Entering a whole word into an arary.
This works whether your user enters only commas between words, only spaces, or both (even colons or semicolons!). I test it out...

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change shorkeys "ctrl+shift+0" for editor
Why not just Alt+Tab your way through?

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append elements to a vector
The usual way to do it is something like this. v = []; for ii = 1:3 v = [v ii:4]; end v % Show v ...

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Array lengths and loops.
Couple of things. It looks like you are masking both the LENGTH function and the I function with a variable. Don't do that - c...

casi 14 años hace | 0

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Legends display incorrect markers
I would dispense with keeping track of all that stuff anyway. Switching current figures in a loop, keeping track of handles, ca...

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How do I create a set of 20 random binary numbers (only 0 and 1) but such that 0 or 1 does not repeat 4 times in a row?
Some methods proposed here don't seem to generate 'random' vectors. Here is an approach that is perhaps 'more random' than some...

casi 14 años hace | 0