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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)];...

13 years 前 | 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. ...

13 years 前 | 0

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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...

13 years 前 | 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...

13 years 前 | 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 ...

13 years 前 | 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...

13 years 前 | 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))

13 years 前 | 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...

13 years 前 | 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...

13 years 前 | 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...

13 years 前 | 1

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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...

13 years 前 | 1

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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/>

13 years 前 | 0

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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...

13 years 前 | 3

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

13 years 前 | 0

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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',... ...

13 years 前 | 0

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

13 years 前 | 1

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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...

13 years 前 | 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...

13 years 前 | 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 ...

13 years 前 | 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...

13 years 前 | 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. ...

13 years 前 | 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 ...

13 years 前 | 0

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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

13 years 前 | 0

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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))))

13 years 前 | 0

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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...

13 years 前 | 1

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

13 years 前 | 1

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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 ...

13 years 前 | 0

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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...

13 years 前 | 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...

13 years 前 | 0

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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...

13 years 前 | 0