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# William Rose

Active since 2007

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I want to optimize an ODE system of equations with constraints
@naiva saeedia, You stated goals such as Mass_C4_G-0.2985<0.1 I assume you really would like abs(Mass_C4_G-0.2985)<0. and ...

3 dagar ago | 0

Decrease Pattern antenna at certain azimuth.
[I will delete my comment, which I meant to be answer.] @Amer tawel, You cannot minimize the intensity in one direction witho...

13 dagar ago | 0

Passing audio file through a notch filter transfer function
@Nathaniel, [edit: remove junk text at the end] lsim() wants the input to be the time domain signal. You are passing the frequ...

15 dagar ago | 0

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MATLAB code of intersection
@Liza L, what have you tried so far? The first part of your question, drawing the straight lines, shouldn't be too hard. Draw a...

17 dagar ago | 0

Global min optimisation for aorta 3-element windkessel model
@Hussam, Use fmincon(). I have used it to optimize a model of the circulation with up to 9 parameters, in order to match presu...

17 dagar ago | 0

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Geoshow and grid points with polygonal shape
@Daniele, I recommend using meshgrid() to make the 2D mesh that covers and extends beyond the plygon of interest, the use resha...

17 dagar ago | 0

Traslate in matlab equations of rotational displacement
@Ilary, The equations you have given are for a rigid body. If you are comfortable regarding the earth as a rigid body within a...

18 dagar ago | 1

Fill area between two lines
@Amélia, Since we do not have your data (xxO, envelopeminO, envelopesupO), I have made up some values to use for the example be...

ungefär en månad ago | 0

Convert pixel/grayscale values ​​to decibels
@ESTER LIMA, given two levels, PVmin and PVmax, whose values are proportional to the intensity of the ultrasound signal, the dec...

ungefär en månad ago | 0

Enhancing Embolic Signal Visualization in Transcranial Doppler Graphs
@Patrícia, Please upload data files that go with the two screenshot images which show possible emboli. Adjust the color scale...

ungefär en månad ago | 1

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I need to call up a vertex from polyshape command
@Bruce Griffin If you have a polygon pgon, of unknown size, get the number of vertices: pgon=polyshape(cosd(0:40:320),sind(0:4...

ungefär en månad ago | 0

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HEART RATE from heart sound
@Monday David, If you attach the MP3 file, others can run your code. You will have to zip it first. [Edit: The sounds which ar...

ungefär 2 månader ago | 0

How can I Plot eigenvectors of a graph on the graph as bars coming out of vertices?
@Defne Odabasi, You can plot arrows representing a 2D eigenvectors, at specific locations, with quiver(X,Y,U,V), where X and Y ...

ungefär 2 månader ago | 2

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Determining the input from the output using IFFT
@Ganesh Prasad, Here is a script that does the deconvolution in the frequency domain, using the ideas in my comment above. It a...

ungefär 2 månader ago | 0

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Having trouble with lsqcurvefit for a heat transfer experiment.
@Nate, The plot below shows the measured data (red *), and the predicted temperature profile with h=150, 2000, and -4000. It s...

ungefär 2 månader ago | 0

Method used by fitnlm to estimate coefficients
@Alex, By default, fitnlm() minimizes the sum squared error. It uses the Levenberg-Marquardt algorithm to find its way downhil...

ungefär 2 månader ago | 0

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implicit numerical method: 1-D unsteady state heat transfer using finite difference method
@Joydeep Bagchi, I think you need to divide the long term (u(i+1,n)-2*u(i,n)+...) by 2, on the right side of your Crank-Nicolso...

ungefär 2 månader ago | 0

Interpolating data to get values at specific depth
@Luís Henrique Bordin, x=(0:10); y=(0:11)'; z=[1.0, 2.3, 5.6, 8.3]; % vectors x,y,z [X,Y]=meshgrid(x,y); %Make data() with de...

ungefär 2 månader ago | 1

How to find out the amplitude and duration of a sine wave of different amplitudes?
@A Lumbini, If you must use wavelets, do a continuous wavelet transform (cwt). THe Matlab documentation is good. Make a 50 Hz s...

ungefär 2 månader ago | 0

How to find out the amplitude and duration of a sine wave of different amplitudes?
@aswathy, @A Lumbini, I would not use wavelets. , I would use stft(). Make a signal which is 3 seconds long. The frequency is ...

ungefär 2 månader ago | 0

Which optimization tool should be used for solving my convex optimization problem?
@KAGANA SARATH, I agree with @Torsten: try fmincon. It allows you to specify linear and nonlinear equality constraints and ine...

ungefär 2 månader ago | 0

Plot the first-order autocorrelation functions for the following light sources: perfect monochromatic source, a thermal lamp((Lc=1 μm, a led =100 μm), lasersLc=1 m and 1 km
@OMEIR HUSSAIN, [Edit: fix spelling errors.] You can format your code as code, by highlighting your code, then click the "Code...

ungefär 2 månader ago | 0

Box plot function help
@Benjamin Wilson, Others cannot run the code you supplied, since we don;t have singlepricingprogrammenew(), and I'm not suggest...

ungefär 2 månader ago | 0

Sharpe ratio in Report
@jorge cogno, [edit: the 0 in the equation below is for the risk free rate] "RiskFreeRate=0 TotalReturn=0.22943, SharpeRatio=0...

ungefär 2 månader ago | 0

how can I create a simple clutter model?
@Kerem Yüksel, [edit: fix spelling errors] [Edit 2: My initial implementation had an exponential distribution of clutter radi...

ungefär 2 månader ago | 0

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How do I find the most stable N consecutive numbers?

ungefär 2 månader ago | 0

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Comparing Finite difference method answer with analytical for 2d plate heat transfer
@Christopher, [Edit: add a line of code to display the maximum temperature for each value of N.] Another excellent answer fro...

ungefär 2 månader ago | 0

how to plot eigenvector calculated from eigs from the matrices created by freefem++
@AMIT, quiver() is good for 2-D vectors; quiver3() for 3D. For an example, I will use the magic square matrix, but I could us...