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How to make an anonymous function whose variable is itself a function of another variable?
Salman, use phi = @(x) x.^3 + 4*x.^2 + x + 3; z = @(x) cos(phi(x)).^2 + 4*sin(phi(x)).^2; z(3) ans = 1.039526660...

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Why is this contradiction happening?
Use alpha = str2num(answer{1}) instead. |answer{1}| is a string that needs to be converted first.

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using math operation as string in array on an expression
yonatan, you are on the right track: carray = {'3+4','3/4'}; res = eval(carray{2}) res = 0.750000000000000

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How do i manage the number of input dialog box according to the user's choice?
DIJESH, you could use something like prompt = 'Enter data: '; title = 'Data input'; dlg_ans = inputdlg(prompt,title,[...

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How do i get multiple outputs in one dialog box?
DIJESH, do you mean something like x = 3; y = 4; z = 2; h = msgbox({['x = ',num2str(x)]... ['y = ',num2str(y...

environ 12 ans il y a | 2

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How do i understand the output of a solve function?
Mikkel, use X = vpa(solve(1*cos(gamma-eta)-1.2*cos(x-eta),x)) Y = vpa(solve(1*sin(gamma-eta)-1.2*sin(x-eta),x)) instead...

environ 12 ans il y a | 0

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??? Undefined function or variable 'blur' Why is that
Shehan, the error message seems to indicate that MATLAB is not able to determine the number of frames in nFrames = shainObj....

environ 12 ans il y a | 0

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How do I plot a particular solution (with given initial conditions) of 3 differential equations with 3 variables?
Andrew, use |ode45| and something like function Lorentz() sigma = 1; r = 1; b = 1; [~,S] = ode45(@EOM,[0 50]...

environ 12 ans il y a | 0

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spike genartion between time 0 to 1
Abhijit, use t = 0:100; d = zeros(1,numel(t)); d(t>=50 & t<=55) = 1; plot(t,d);

environ 12 ans il y a | 0

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index must be a positive integer or logical
Sabrina, difficult to say without seeing the code. However, in MATLAB indexing starts with 1, not 0: >> a = [4 3 2 1] a = ...

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how can i print 2 function?s results ?
Elia, you need to call the function, e.g., [X,niter] = bisection2([1,3],1e-6) Also, I assume the function |f| is properly...

environ 12 ans il y a | 1

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How to sum a specific number of observations through an entire dataset ?
TRAILOKYA, if it is a numeric array use |reshape| m_result = sum(reshape(m,75,[]));

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Please explain the above commands,
Ramya, |dd| contains the position numbers of all elements in matrix |a| that are smaller than 4, which would be 3, 2, and 1. ...

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How do i select data to legend in a plot ?
Blaise, use data1 = 10*ones(10,4)+randn(10,4); t1 = (0:1:9); figure(); p1 = plot(t1,data1,'bo'); hold on data2 ...

environ 12 ans il y a | 5

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hello,everyone.I'm new here.how can i get the whole answers of an one yuan polynomial equation using fsolve?thank you so much
How about syms x sol = solve(x^7 + 2*x^5 + 3*x^3 + x + 7==0) As described in the documentation, |fsolve| can only hand...

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How do I simulate simulink model using the ode45.m function at the command prompt or in an m file?
Osman, how about doing it all in Simulink? <</matlabcentral/answers/uploaded_files/12651/Unbenannt.PNG>> If you select...

environ 12 ans il y a | 1

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Why is the word "and" coming up in my output?
Lucy, for example, in the expression for |y5| there is a term cosh(p)*cosh(q)&cosh(t) (typo?) which results in an |and|. ...

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Are all add on products of Student version of MATLAB R2014a valid permanently?
Meghna, see the answer to your other question. In short, you can use all products (including add-ons) of/to the Student version ...

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I have purchased MATLAB Student Version. For how long the license is valid for this version?
Meghna, the MATLAB student version is a perpetual license. Which means you can use it indefinitely, as long as you are a student...

environ 12 ans il y a | 3

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using for loop with 2 variables.
Sermet, use a = [1;2;3;4] b = [5;6;7] kk = 1; for ii = 1:4 for jj = 1:3 x(kk) = a(ii) + b(jj) kk =...

environ 12 ans il y a | 1

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ODE45 for a system of diff eq with a vector eq
Barbara, check out function odetest() [t,y] = ode45(@rigid,[0 12],[0 0 0]); plot(t,y) end function dy = rigid(t,y)...

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how to change command window display options
GCE, try format compact

environ 12 ans il y a | 0

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How do I convert the weird magnitudes in the results to zero ?
JMS, use something like data = [1 2 NaN; 3 NaN 4]; data(isnan(data)) = 0;

environ 12 ans il y a | 1

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Finding index for minimum value in array
Bathrinath, use [val,ind] = min(pbest(~ismember(pbest,0))); or, the more general approach val = min(pbest(~ismember(p...

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how to multiply each of the array with another set of array
Grace, use a = [1,2,3,4]; j = [1,2,3]'; b = bsxfun(@power,a,j);

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sine wave max - min replacement
Zacharias, use something like x = 0:0.1:7; y = sin(x); y(y==max(y)) = y(circshift(y==max(y),1,2));

environ 12 ans il y a | 0

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How to use more that one initial conditions In ODE45
Velmurugan, see this <http://www.mathworks.de/matlabcentral/answers/118837-how-to-add-trajectory-into-a-phase-plane#answer_12589...

environ 12 ans il y a | 0

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how to change it?
Shi, check out fileID = fopen('num.txt','w'); while (i<10) x = input('enter the number: '); if isreal(x) ...

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Change time of a matlab simulation
Kelilah, you could use something like: dt = 1; T = 100; t = 0:dt:T; x1 = 1:100; y1 = sin(x1); plot(x1,y1,'b--') ...

environ 12 ans il y a | 0