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How to plot in 3D a given set of data
I would do something like this — x=[0:700:10800]; y=[0:770:11000]; [Xm,Ym] = ndgrid(x, y); Zm = griddata(x, y, z, Xm, Ym); ...

5 years ago | 1

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Answered
how plot two figures on same axis with two different origin points
If the x-axis is the same for both curves, while one curve has the origin (I assume this means the 0 value on the y-axis) at dif...

5 years ago | 1

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3D surface plot change origin of axis?
Perhaps — cs = cs - min(cs); Since ‘cs’ is likely a matrix, that will need to be changed to conform to the dimensions of ‘cs’...

5 years ago | 0

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Rebuild PDFs from original data
The is not an option for histfit or the others, however calculating the parameters is straightforward — LD = load('data.mat')...

5 years ago | 0

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Why can't I put the 1x3 matrix into 1x3 variable?
Try this — buf = [1 2 3] buf = num2cell(buf) [a b c] = buf{:} .

5 years ago | 2

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a system of non-linear equations (using fsolve in a loop)
Pass them as extra parameters. See Passing Extra Parameters for details. This appears to work — % Crating Solved Varia...

5 years ago | 0

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Trying to plot, no figure comes up
I suspect that the problem is that you simpoly need to call it correctly. The function must be at the end of the file, if it is...

5 years ago | 0

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How to determine how much RAM is available?
The memory function is the only option I’m aware of that would come close to providing that information. There are related func...

5 years ago | 0

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How can I use fmisearch() to evaluate the parameters in a matrix?
If the objective is to determine the parameter at a zero-crossing (root), use fsolve or fzero, not fminsearch. Try something ...

5 years ago | 0

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How to fix legend error??
Try this — K=1.38065e-23; %Boltzman Constant q=1.602e-19; ...

5 years ago | 0

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How to Store Time constant from "damp"
The is relatively easy to calculate — s = tf('s'); H = (s^2 - 2*s - 5) / (s^3 + 5*s^2 - 7*s - 20); damp(H) ...

5 years ago | 0

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Answered
Cosine of an angle
Experiment with vpasolve, and specifically Specify Ranges of Solutions .

5 years ago | 0

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0.14*100~=14
Not a bug! See Floating-Point Numbers for a detailed discussion.

5 years ago | 1

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Format exponent notation: start with 0
I am not certain what you are asking. I wrote a little utility function for my own use a while back to do something like this...

5 years ago | 0

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Getting incorrect plot – curve does not cross the x axis correctly
The roots are [0 2], so use those with the poly function: rts = [0 2]; coefs = poly(rts) figure fplot(@(x) x.^2 - 2.*x, [-5...

5 years ago | 1

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Answered
How can I split the columns of my text file as separate variables with textscan?
‘I do not want to take headings into account so I tried to use 'commentstyle'.’ The HeaderLines argument would likely be a be...

5 years ago | 0

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Function runs in one script but not another ?
Vectorise its calculation, then call it — conc function[] = conc() v = 0.00001 ; D = 0.0000001 ; t = 86400 ; X = 0 :...

5 years ago | 0

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How to make this contour plot like this ??
Increase the numnber of contours. See Contours at Ten Levels for an illustration.

5 years ago | 0

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error using integral function
‘but in directly i is depending on t because v is depending on t and y is depending on v’ True, however integral has no way o...

5 years ago | 0

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How to graph equations with different x domains?
First, code it correctly, then use logical indexing — t = linspace(0, 110); x1 = @(t) -10000*exp(-0.05*t) + 10000; x2 = @(t)...

5 years ago | 0

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Answered
How do I pass the signal through a low-pass FIR filter?
if ‘h’ are the numerator vector of the filter (and the filter is designed correctly) — signal_filtered = filtfilt(h, 1, signal...

5 years ago | 1

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problem with ode45 solving
Assuming both functions are functions of time — syms x(t) v(t) u = sym(1); ode1 = diff(x) == v ode2 = diff(v) == u [x(t)...

5 years ago | 1

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Answered
Lsqcurvefit and ode45 to fit data to system of differential equations
Note that neither ‘x’ or ‘t’ are explicity arguments to ‘Testv3Solver’, so nothing is passed to it and nothing ever changes — ...

5 years ago | 0

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Answered
Solving coupled second order differential equations using ODE
None of the variables you are passing to ‘ftotal’ have been defined numerically (at least in the posted code). They need to b...

5 years ago | 0

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How do I calculate power for each signal?
Use the buffer function to segment the signal into 1-second increments. Since you want 1-second samples, the vector length is s...

5 years ago | 1

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Answered
How to find what values of a and b give the minimum value in the sum
This is a relatively straightforward optmisation problem. Try this — x = randn(20,1); ...

5 years ago | 0

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fopen error using text file
Use the fullfile function to build the complete path.

5 years ago | 0

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How can I get the transfer function?
Using the Symbolic Math Toolbox is likely not appropriate here. Try this instead — s = tf('s'); G = (-3.2*s^2 - 2.9*s -0.0...

5 years ago | 0

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Array indices must be positive integers or logical values.
There were problems with indexing ‘freqArray’ and then ‘toneArray’. See if this does what you want — ...

5 years ago | 0

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how to get the plot from function
Uncomment this hold call — figure(1) plot(x1,u) % hold on N2=21 u=poisson(N2) and the code does what you want. N...

5 years ago | 0

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