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How to add text in plot?
delila, use the |text| command. See the <http://de.mathworks.com/help/matlab/ref/text.html documentation> for reference.

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How to returns combined data from a single vector with no repetitions?
Not quite sure what you are trying to do. Do you mean: A = [1 2 2 3 3 3]; B = unique(A) B = 1 2 3

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how do you plot signal like cos wt and 1/4 cycle time delayed version of signal on same axis
Amit, how about x = 0:0.01:2*pi; y = cos(x); yd = cos(x + pi/2); plot(x,y,x,yd)

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How can I derive solution in matrix form?
Hello Junsoo, what relevance has |eqn| in computing |y| as a function of |x|? In general, you need to use the dot notation w...

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'@' how to use this?
Victor, does this help? fh = @(x,y) x.*y.^2; fh(3,2) ans = 12 The example above shows a function handle for an a...

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find minima in 3D function/matrix
Joachim, use instead [r,c] = find(Z==MinV) % gives two arguments r = 28 14 c = 14 28 which will a...

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How to use subs with sym
hadi, you need to define |x| as a symbolic variable syms x y f = @(x,y) x^2 + y; f = sym(f); out = subs(f,x,2) out...

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Differentiation of Z, Symbolic toolbox?
Timothy, looks like you do not have access to the Symbolic Math Toolbox. See this <http://www.mathworks.com/matlabcentral/answer...

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Clarifications on using dsolve
Hirak, one simple way would be to add another initial condition (first derivative) f = dsolve('D2y + y = 0','Dy(0) = 1','y(0...

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why is my results coiming out as a single 0 while using matlab
|R| is a vector, |P| is a scalar. Do you mean to do R = rand (10,1)% generate a sample in Unif(0,1) P = 0.5; N = 10; for...

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partial differential for nonlinear equation
Use |gradient| syms X Y Z Eq = -31.65951 + sqrt((20460991.052399-X)^2+(11012393.207537-Y)^2+(13140061.841029-Z)^2)-sqrt((...

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how would i plot upper half of an ellipse in matlab using standar form?
With a bit of math, solve for |y| a = 2; b = 3; x = -a:0.1:a; y = sqrt(b^2 - b^2*(x.^2/a^2)); plot(x,y)

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Matlab Summation Cosine Sine operator
Correct. |b| is an array (e.g. vector). The command applies the sine to all the components of |b| and then sums all those sine t...

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what is the syntax to implement natural logrithamic function (ln) into coding
The natural log is simply |log| tim = (x/z)*log(u);

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Is it possible to multiply Matrices which contains variables?
Yes, it is. Symbolically (showing it for 2x2): syms a b c d e f g h mat1 = [a b; c d]; mat2 = [d e; f g]; mat3 = mat...

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Random number of nested for loops
Hadi, without any further requirements on output data type, etc., how about myarray = dec2bin([0:2^N-1],N-1)

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How can i display symbolic expressions using decimals instead of rational fractions?
Dennis, you could use something like vpa(strain,5)

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'int2str' - like operator for a symbolic matrix element
Do you mean, e.g. mystring = char(Cs(1))

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??? Undefined function or method 'power' for input arguments of type 'function_handle'.
Suj, two things: |root| and |Zed| are not defined. In x1 = y - (z1(z)/dz(z)); the running index is probably |u|, and not...

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Numerical instability of spherical pendulum
Bas, the plus sign in your equation does look a bit strange. Shouldn't that be a minus instead?

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import constants to simulink
Ameen, a standard approach is through callbacks. In your Simulink model go to > File > Model Properties > Model Properties, navi...

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How to plot a shaded range between a min and max y value for the same x value
Oliver, something like this? t = 0:0.1:10; y1 = sin(t); y2 = sin(t + 0.1) + 0.5; y3 = cos(t).^2; y4 = cos(t + 0.2)....

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Why function sym and syms dont work in R2012b?
Nikola, you probably don't have the Symbolic Math Toolbox installed/licensed. To check use ver to list all installed too...

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Question about mouse click on figure
This code snippet should get you started: button = 1; getpt = 1; [x,y,button] = ginput(1); XY = [x y]; wh...

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Plotting orbits of 3 ODE system
pj93, use something like function myorbit() x0 = [1 1 1]; tSpan = [0 10]; a = 1; b = 1; c = 1; I ...

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Get the mean of the matrix and extract the elemnts fromthe matrix that are greater than the mean
How about ouput = C(C<mean(C))

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Need help on using ODE45
John, your code is good. Is the code above all contained within *one* file with name |crosscatalator.m|? If so, try at the MA...

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How to use functions in matlab
Shinjin, your function is probably residing whithin a script, correct? If so, copy-paste the function into a new function window...

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Two matrix subtraction with each of different dimension
Pankaja, in general, you can only subtract matrices of equal size. What would you like to see happening?

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Matlab symbolic variables depending on time "t" and call of symbolic vector elements
Mohamed, to your first question: use instead Y = [0 cos(theta1);1 sin(theta2)] * [x; y] % note the last semi-colon Y = ...

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