Answered
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...

12 years ago | 1

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

12 years ago | 0

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Answered
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

12 years ago | 0

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Answered
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,[...

12 years ago | 0

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Answered
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...

12 years ago | 2

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Answered
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...

12 years ago | 0

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Answered
??? 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....

12 years ago | 0

Answered
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]...

12 years ago | 0

Answered
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);

12 years ago | 0

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Answered
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 = ...

12 years ago | 0

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Answered
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...

12 years ago | 1

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Answered
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,[]));

12 years ago | 0

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12 years ago | 0

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Answered
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. ...

12 years ago | 0

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Answered
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 ...

12 years ago | 5

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Answered
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...

12 years ago | 0

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Answered
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...

12 years ago | 1

Answered
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|. ...

12 years ago | 0

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Answered
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 ...

12 years ago | 0

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Answered
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...

12 years ago | 3

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Answered
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 =...

12 years ago | 1

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Answered
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)...

12 years ago | 0

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

12 years ago | 0

Answered
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;

12 years ago | 1

Answered
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...

12 years ago | 3

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Answered
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);

12 years ago | 1

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Answered
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));

12 years ago | 0

Answered
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...

12 years ago | 0

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

12 years ago | 0

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Answered
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--') ...

12 years ago | 0